Pub Date : 2025-01-10DOI: 10.1016/j.wear.2025.205735
Kedong Zhang , Mingjing Jiang , Haishan Li , Xuhong Guo , Yayun Liu , Chuanyang Wang
The micro-texture fabricated on the cubic boron nitride (CBN) tool surface is an established method for enhancing the penetration ability of nanofluids into the tool/chip interface. However, achieving efficient and continuous cooling lubrication at the micro-textured tool/chip interface continues to pose significant challenges. In this study, we employed an external magnetic field to enhance the permeability of nanofluids, while also taking into account the effects of electroosmosis. The turning experiments conducted on superalloys using micro-textured CBN tools (named TSN) have validated the effectiveness of the proposed method. By increasing the magnetic field intensity to 1200 Gs and integrating an electroosmotic accelerator into Fe3O4 nanofluids, the anti-wear properties of TSN were enhanced. This enhancement resulted in a reduction of cutting force by approximately 18 %, a decrease in cutting temperature by 9.1 %, and a reduction in surface roughness of machined workpiece by 43.04 %. Finally, the mechanism was discussed.
{"title":"Anti-wear behaviors of nanofluids at the micro-textured tool/chip interface of CBN tools with electromagnetic field effects","authors":"Kedong Zhang , Mingjing Jiang , Haishan Li , Xuhong Guo , Yayun Liu , Chuanyang Wang","doi":"10.1016/j.wear.2025.205735","DOIUrl":"10.1016/j.wear.2025.205735","url":null,"abstract":"<div><div>The micro-texture fabricated on the cubic boron nitride (CBN) tool surface is an established method for enhancing the penetration ability of nanofluids into the tool/chip interface. However, achieving efficient and continuous cooling lubrication at the micro-textured tool/chip interface continues to pose significant challenges. In this study, we employed an external magnetic field to enhance the permeability of nanofluids, while also taking into account the effects of electroosmosis. The turning experiments conducted on superalloys using micro-textured CBN tools (named TSN) have validated the effectiveness of the proposed method. By increasing the magnetic field intensity to 1200 Gs and integrating an electroosmotic accelerator into Fe<sub>3</sub>O<sub>4</sub> nanofluids, the anti-wear properties of TSN were enhanced. This enhancement resulted in a reduction of cutting force by approximately 18 %, a decrease in cutting temperature by 9.1 %, and a reduction in surface roughness of machined workpiece by 43.04 %. Finally, the mechanism was discussed.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205735"},"PeriodicalIF":5.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-10DOI: 10.1016/j.wear.2025.205737
Haishan Li , Kedong Zhang , Yayun Liu , Tongshun Liu , Xuhong Guo , Youqiang Xing
Nanofluid as cooling and lubrication medium at the micro-textured contact interface is common. It is a promising approach to employ electroosmosis effect to improve the infiltration of nanofluid into the micro-textured interface, thereby enhancing the tribological performance. In this study, the effects of Fe3O4 nanofluids with different surfactant additions on the friction and wear performance of micro-textured specimens were investigated through ball-on-disc friction experiments under self-excited electric fields. Results showed that micro-textured specimens combined with 0.5 vol% sodium lauriminodipropionate (SLI) surfactant exhibited the lowest friction temperature, smallest average friction coefficient, and least ball wear. Moreover, CBN specimen wear was significantly reduced. Combining capillary electroosmosis experiments and tribological test results revealed the penetration mechanism of Fe3O4 nanofluids.
{"title":"Enhancing tribological performance of CBN materials by Fe3O4 nanofluid and wedge-shaped micro-texture considering electroosmosis effect","authors":"Haishan Li , Kedong Zhang , Yayun Liu , Tongshun Liu , Xuhong Guo , Youqiang Xing","doi":"10.1016/j.wear.2025.205737","DOIUrl":"10.1016/j.wear.2025.205737","url":null,"abstract":"<div><div>Nanofluid as cooling and lubrication medium at the micro-textured contact interface is common. It is a promising approach to employ electroosmosis effect to improve the infiltration of nanofluid into the micro-textured interface, thereby enhancing the tribological performance. In this study, the effects of Fe<sub>3</sub>O<sub>4</sub> nanofluids with different surfactant additions on the friction and wear performance of micro-textured specimens were investigated through ball-on-disc friction experiments under self-excited electric fields. Results showed that micro-textured specimens combined with 0.5 vol% sodium lauriminodipropionate (SLI) surfactant exhibited the lowest friction temperature, smallest average friction coefficient, and least ball wear. Moreover, CBN specimen wear was significantly reduced. Combining capillary electroosmosis experiments and tribological test results revealed the penetration mechanism of Fe<sub>3</sub>O<sub>4</sub> nanofluids.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205737"},"PeriodicalIF":5.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-07DOI: 10.1016/j.wear.2024.205730
Shuang Yu , Shuqi Wang , Yaming Wang , Zhiyun Ye , Guoliang Chen , Qiang Zhao , Yang Li , Dawei Ren , Yongchun Zou , Jiahu Ouyang , Dechang Jia , Yu Zhou
Designing and preparing engineering abradable seal coatings (ASCs) with excellent abrasibility and adequate mechanical stability at extremely high temperatures is exceptionally challenging. Inspired by the unique structural features of articulation, we designed a YSZ/BN-polyester coating with polyester to form a cancellous-like structure and a smooth “glaze” layer to form a cartilage-like structure-combined, the two formed an ASC with improved abrasibility at both room temperature and a high temperature of 1000 °C. The cancellous-like structure in the YSZ/BN-polyester coating effectively reduced the number of spalling pits caused by stress concentration and brittle fracture, which contributed to a reduction in the coefficient of friction (COF, 0.33) at room temperature. At 1000 °C, the wear debris rich in h-BN and B2O3 produced by the oxidation of h-BN compressed to form a cartilage-like smooth “glaze” layer. Moreover, B2O3, as a “sintering agent”, improved the stability of the cartilage-like structure and caused “healing”, which effectively reduced the COF (0.22) and its fluctuation amplitude at 1000 °C. The cartilage-like structure helped to improve the mechanical stability of the coating, which further extended the service durability of the YSZ/BN-polyester sealing coating. Thus, the YSZ/BN-polyester coating with an articulation-mimicking structure demonstrates significant promise for the development of a high-temperature ASC system.
{"title":"Inspired articular structure for enhancing high-temperature abrasibility of as-sprayed YSZ/BN-polyester sealing coating","authors":"Shuang Yu , Shuqi Wang , Yaming Wang , Zhiyun Ye , Guoliang Chen , Qiang Zhao , Yang Li , Dawei Ren , Yongchun Zou , Jiahu Ouyang , Dechang Jia , Yu Zhou","doi":"10.1016/j.wear.2024.205730","DOIUrl":"10.1016/j.wear.2024.205730","url":null,"abstract":"<div><div>Designing and preparing engineering abradable seal coatings (ASCs) with excellent abrasibility and adequate mechanical stability at extremely high temperatures is exceptionally challenging. Inspired by the unique structural features of articulation, we designed a YSZ/BN-polyester coating with polyester to form a cancellous-like structure and a smooth “glaze” layer to form a cartilage-like structure-combined, the two formed an ASC with improved abrasibility at both room temperature and a high temperature of 1000 °C. The cancellous-like structure in the YSZ/BN-polyester coating effectively reduced the number of spalling pits caused by stress concentration and brittle fracture, which contributed to a reduction in the coefficient of friction (COF, 0.33) at room temperature. At 1000 °C, the wear debris rich in <em>h</em>-BN and B<sub>2</sub>O<sub>3</sub> produced by the oxidation of <em>h</em>-BN compressed to form a cartilage-like smooth “glaze” layer. Moreover, B<sub>2</sub>O<sub>3</sub>, as a “sintering agent”, improved the stability of the cartilage-like structure and caused “healing”, which effectively reduced the COF (0.22) and its fluctuation amplitude at 1000 °C. The cartilage-like structure helped to improve the mechanical stability of the coating, which further extended the service durability of the YSZ/BN-polyester sealing coating. Thus, the YSZ/BN-polyester coating with an articulation-mimicking structure demonstrates significant promise for the development of a high-temperature ASC system.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205730"},"PeriodicalIF":5.3,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-07DOI: 10.1016/j.wear.2025.205734
Xiao Yu , Youqiang Wang , Chengyong Wang , Ping Zhang
Cutting processes can form microtextures with alternating peaks and valleys on the surface, while ultrasonic rolling can cause material flow from peaks to valleys and bring about plastic deformation strengthening, which avoids the reduction in surface strength associated with microstructures processed by material removal. This study utilizes a combined approach of cutting and ultrasonic rolling process (CURP) to create high-strength, wear-resistant microtextured surfaces on aluminum alloys. The research investigates the principles of point contact wear on microtextured surfaces. Models were developed for the contact area between cutting roughness peaks and the rolling element to analyze the shape of the contact area and the forces acting on the rolling element under different processing parameters. Experiments were conducted with single and multiple passes of ultrasonic rolling under different cutting parameters to establish the relationship between indentation size and processing parameters. Friction and wear experiments were performed to explore the wear mechanisms on surfaces with microtexturing. The results revealed that the length of the indentation is positively correlated with the cutting feed rate. At the same indentation depth, a larger feed rate results in a longer indentation length. As the angle φ between the rolling direction and the cutting mark decreases, single indentations shift from symmetrically distributed along the midline of the rolling to one side. When the feed rate is high and the overlap rate is low, the roller-burnished surface exhibits a uniformly distributed sector-shaped pit area. However, with an overlap rate of 25 %, sector-shaped pits disappear under smaller feed rates. Microtextured surfaces are less prone to microcracks and material peeling abrasion under light loading conditions. With an increase in contact stress during heavy loading, surfaces with higher degrees of work hardening, such as the CURP specimens, become more susceptible to material peeling.
{"title":"Surface preparation and wear mechanism of high-strength microtextured aluminum alloys using combined cutting and ultrasonic rolling process","authors":"Xiao Yu , Youqiang Wang , Chengyong Wang , Ping Zhang","doi":"10.1016/j.wear.2025.205734","DOIUrl":"10.1016/j.wear.2025.205734","url":null,"abstract":"<div><div>Cutting processes can form microtextures with alternating peaks and valleys on the surface, while ultrasonic rolling can cause material flow from peaks to valleys and bring about plastic deformation strengthening, which avoids the reduction in surface strength associated with microstructures processed by material removal. This study utilizes a combined approach of cutting and ultrasonic rolling process (CURP) to create high-strength, wear-resistant microtextured surfaces on aluminum alloys. The research investigates the principles of point contact wear on microtextured surfaces. Models were developed for the contact area between cutting roughness peaks and the rolling element to analyze the shape of the contact area and the forces acting on the rolling element under different processing parameters. Experiments were conducted with single and multiple passes of ultrasonic rolling under different cutting parameters to establish the relationship between indentation size and processing parameters. Friction and wear experiments were performed to explore the wear mechanisms on surfaces with microtexturing. The results revealed that the length of the indentation is positively correlated with the cutting feed rate. At the same indentation depth, a larger feed rate results in a longer indentation length. As the angle φ between the rolling direction and the cutting mark decreases, single indentations shift from symmetrically distributed along the midline of the rolling to one side. When the feed rate is high and the overlap rate is low, the roller-burnished surface exhibits a uniformly distributed sector-shaped pit area. However, with an overlap rate of 25 %, sector-shaped pits disappear under smaller feed rates. Microtextured surfaces are less prone to microcracks and material peeling abrasion under light loading conditions. With an increase in contact stress during heavy loading, surfaces with higher degrees of work hardening, such as the CURP specimens, become more susceptible to material peeling.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205734"},"PeriodicalIF":5.3,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-06DOI: 10.1016/j.wear.2024.205723
Huajie Tang , Xinchun Chen , Chunhui Zhao , Daoxin Su , Jinshan Pan , Jianlin Sun
Abnormal wear has always been a common concern in engineering lubrication, which sometimes depends on the lubrication. The present work aimed to elucidate the formation mechanism of abnormal non-circular wear scar of GCr15 ball-ball contact in the presence of dibutyl phosphite (DBPI). A detailed characterization of morphology, composition, and structure was performed. The results show that the abnormal wear depended on the chemical reactivity of DBPI, structure and size of wear products. Importantly, wear products exhibited a flocculent structure at the macroscale and had a capsule structure with metal debris encapsulated into an amorphous shell at the microscale. The redeposition of wear products formed a multilayered tribofilm, containing a metal-debris-dominated layer and multiple organic-dominated amorphous layers. The total thickness of tribofilm can be up to 268 nm. Fe3(POx)2, FePOx, Fe[DBPI]2, and Fe[DBPI]3 were the principal composition of tribofilm. The present work elucidates the molecule-dependent abnormal wear of ball-ball contact, which will have wide potential for the additives design and the corresponding lubrication mechanism research.
{"title":"Molecule-dependent abnormal wear of GCr15 ball-ball contact: Morphological, chemical, and structural characterization","authors":"Huajie Tang , Xinchun Chen , Chunhui Zhao , Daoxin Su , Jinshan Pan , Jianlin Sun","doi":"10.1016/j.wear.2024.205723","DOIUrl":"10.1016/j.wear.2024.205723","url":null,"abstract":"<div><div>Abnormal wear has always been a common concern in engineering lubrication, which sometimes depends on the lubrication. The present work aimed to elucidate the formation mechanism of abnormal non-circular wear scar of GCr15 ball-ball contact in the presence of dibutyl phosphite (DBPI). A detailed characterization of morphology, composition, and structure was performed. The results show that the abnormal wear depended on the chemical reactivity of DBPI, structure and size of wear products. Importantly, wear products exhibited a flocculent structure at the macroscale and had a capsule structure with metal debris encapsulated into an amorphous shell at the microscale. The redeposition of wear products formed a multilayered tribofilm, containing a metal-debris-dominated layer and multiple organic-dominated amorphous layers. The total thickness of tribofilm can be up to 268 nm. Fe<sub>3</sub>(PO<sub><em>x</em></sub>)<sub>2</sub>, FePO<sub><em>x</em></sub>, Fe[DBPI]<sub>2</sub>, and Fe[DBPI]<sub>3</sub> were the principal composition of tribofilm. The present work elucidates the molecule-dependent abnormal wear of ball-ball contact, which will have wide potential for the additives design and the corresponding lubrication mechanism research.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205723"},"PeriodicalIF":5.3,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-05DOI: 10.1016/j.wear.2025.205733
Paulo Sérgio Martins , Ramon Martins Drumond , Ernane Rodrigues da Silva , Elhadji Cheikh Talibouya Ba , Pedro Miraglia Firpe
Research aimed at enhancing cutting tools’ wear resistance made from Diamond-Like Carbon (DLC) coated high-speed steel has demonstrated potential applications in the metal-mechanical and medical sectors. While numerous wear testing techniques exist, many encounter challenges when dealing with thin films, primarily due to the uncertainty in distinguishing between the substrate and the coating. Therefore, this study intents to evaluate the tribological behavior of the DLC deposited on AISI M − 35 steel, aiming to predict its behavior under machining conditions through structural characterizations, chemical mapping, adhesion and micro abrasion wear tests, as well as SEM to analyze the coating thickness, indentations and wear craters. The results showed the DLC production consisting mainly of sp2 and about 18 % of sp3 hybridizations. The deposition process on the substrate did not cause significant alterations in the Ra values. The adhesion quality to be classified as HF3, which falls within the acceptable limits according to the standard used. Compared to AISI M − 35 steel, DLC provided a reduction of about 71 % in micro abrasion wear and an average specific wear of 142 times lower. In this regard, it can be concluded that using DLC coating on cutting tools made from AISI M − 35 steel may be a promising alternative when seeking better wear resistance and, consequently, longer tool life.
{"title":"Comparison between the tribological aspects of AISI M-35 with and without diamond-like carbon coating","authors":"Paulo Sérgio Martins , Ramon Martins Drumond , Ernane Rodrigues da Silva , Elhadji Cheikh Talibouya Ba , Pedro Miraglia Firpe","doi":"10.1016/j.wear.2025.205733","DOIUrl":"10.1016/j.wear.2025.205733","url":null,"abstract":"<div><div>Research aimed at enhancing cutting tools’ wear resistance made from Diamond-Like Carbon (DLC) coated high-speed steel has demonstrated potential applications in the metal-mechanical and medical sectors. While numerous wear testing techniques exist, many encounter challenges when dealing with thin films, primarily due to the uncertainty in distinguishing between the substrate and the coating. Therefore, this study intents to evaluate the tribological behavior of the DLC deposited on AISI M − 35 steel, aiming to predict its behavior under machining conditions through structural characterizations, chemical mapping, adhesion and micro abrasion wear tests, as well as SEM to analyze the coating thickness, indentations and wear craters. The results showed the DLC production consisting mainly of sp<sup>2</sup> and about 18 % of sp<sup>3</sup> hybridizations. The deposition process on the substrate did not cause significant alterations in the R<sub>a</sub> values. The adhesion quality to be classified as HF3, which falls within the acceptable limits according to the standard used. Compared to AISI M − 35 steel, DLC provided a reduction of about 71 % in micro abrasion wear and an average specific wear of 142 times lower. In this regard, it can be concluded that using DLC coating on cutting tools made from AISI M − 35 steel may be a promising alternative when seeking better wear resistance and, consequently, longer tool life.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205733"},"PeriodicalIF":5.3,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-02DOI: 10.1016/j.wear.2024.205695
Jianhao Peng , Zhipeng Xu , Ruihong Zhou , Rui Wang , Guojun Li , Xuebin Yao , Biao Zhao , Wenfeng Ding , Jiuhua Xu
Silicon carbide particle-reinforced aluminum matrix composite (SiCp/Al) has been widely utilized in aerospace, rail transportation, and electronic components, owing to its high-performance properties such as high specific strength and stiffness, wear and fatigue resistance, good thermal stability, simple manufacturing process, and adjustable properties. However, its exceptional performance presents challenges to the material removal process as it leads to rapid tool wear, high and fluctuating cutting forces, affecting the processing efficiency and quality. The present study focuses on investigating the tool wear mechanism and failure process in the side milling of SiCp/Al composite materials with polycrystalline cubic boron nitride (PCBN) and polycrystalline diamond (PCD) cutting tools. The results indicate that the wear characteristics of PCBN cutter flank face are blunt tip and rapid expansion of large wear area, whereas PCD cutter wear primarily manifests as minor chipping at the tip and gradual wear on the flank face. The cutting force of PCBN cutter is significantly higher than that of PCD cutter, exhibiting an average increase of 38.1 %. The PCBN cutter undergoes gradual and continuous material loss during the machining process, resulting in erosion and dulling of the cutting edge. In contrast, PCD cutter exhibits higher resistance to erosion and retains its sharp cutting edge even during normal wear conditions. The rake face of a PCBN cutter exhibits characteristics of build-up edge and scratches, with abrasive wear, adhesive wear, and possible diffusion wear. The tip of the PCD cutter displays a distinct serrated cutting edge, with minor scratches on the flank face and chip adhesion observed on the rake face. Here, the primary modes include adhesive wear, brittle fracture, and slight abrasive wear. These findings are expected to serve as valuable references for the efficient and high-quality machining of SiCp/Al materials.
{"title":"Wear mechanisms of superhard cutting tools in machining of SiCp/Al composites","authors":"Jianhao Peng , Zhipeng Xu , Ruihong Zhou , Rui Wang , Guojun Li , Xuebin Yao , Biao Zhao , Wenfeng Ding , Jiuhua Xu","doi":"10.1016/j.wear.2024.205695","DOIUrl":"10.1016/j.wear.2024.205695","url":null,"abstract":"<div><div>Silicon carbide particle-reinforced aluminum matrix composite (SiC<sub>p</sub>/Al) has been widely utilized in aerospace, rail transportation, and electronic components, owing to its high-performance properties such as high specific strength and stiffness, wear and fatigue resistance, good thermal stability, simple manufacturing process, and adjustable properties. However, its exceptional performance presents challenges to the material removal process as it leads to rapid tool wear, high and fluctuating cutting forces, affecting the processing efficiency and quality. The present study focuses on investigating the tool wear mechanism and failure process in the side milling of SiC<sub>p</sub>/Al composite materials with polycrystalline cubic boron nitride (PCBN) and polycrystalline diamond (PCD) cutting tools. The results indicate that the wear characteristics of PCBN cutter flank face are blunt tip and rapid expansion of large wear area, whereas PCD cutter wear primarily manifests as minor chipping at the tip and gradual wear on the flank face. The cutting force of PCBN cutter is significantly higher than that of PCD cutter, exhibiting an average increase of 38.1 %. The PCBN cutter undergoes gradual and continuous material loss during the machining process, resulting in erosion and dulling of the cutting edge. In contrast, PCD cutter exhibits higher resistance to erosion and retains its sharp cutting edge even during normal wear conditions. The rake face of a PCBN cutter exhibits characteristics of build-up edge and scratches, with abrasive wear, adhesive wear, and possible diffusion wear. The tip of the PCD cutter displays a distinct serrated cutting edge, with minor scratches on the flank face and chip adhesion observed on the rake face. Here, the primary modes include adhesive wear, brittle fracture, and slight abrasive wear. These findings are expected to serve as valuable references for the efficient and high-quality machining of SiC<sub>p</sub>/Al materials.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205695"},"PeriodicalIF":5.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-02DOI: 10.1016/j.wear.2024.205729
Carlos Alberto Souto , Ronaldo Câmara Cozza , Sydney F. Santos , Filipe Caldatto Dalan , Kátia Regina Cardoso
In this study the development and characterization of the high-entropy alloys (HEAs) AlCoCrFeNiV and AlCo0.25CrNi1.75V for applications requiring high hardness, elastic modulus, and wear resistance was investigated. Both compositions were designed through thermodynamic calculations and empirical parameters, produced by electric arc melting, and subjected to homogenization heat treatments. X-ray diffraction demonstrated that both alloys are biphasic, featuring A2 and B2 structures. SEM analysis revealed that AlCoCrFeNiV in the as-cast (AC) condition exhibited large columnar grains, while heat treatment (HT) results in the precipitation of the A2 phase at the grain boundaries. In contrast, AlCo0.25CrNi1.75V exhibits a dendritic microstructure in both as-cast and heat-treated conditions. This alloy is composed of A2 and B2 phases, formed by spinodal decomposition. These microstructural differences significantly influenced the mechanical properties and wear resistance of the alloys. The more uniform microstructure of the equimolar alloy resulted in more stable hardness and elastic modulus values in both the as-cast and heat-treated conditions. Nanoindentation tests showed that AlCoCrFeNiV maintained stable hardness and elastic modulus after heat treatment, attributed to its more uniform microstructure. Conversely, AlCo0.25CrNi1.75V experienced a reduction in these properties after heat treatment, linked to its basket weave morphology, which led to a less uniform distribution of phases. Tribological tests revealed contrasting behaviors between the alloys: AlCoCrFeNiV exhibited superior wear resistance and a lower coefficient of friction in ball-cratering microabrasion, attributed to its uniform microstructure. In contrast, AlCo0.25CrNi1.75V demonstrated better wear resistance and a reduced coefficient of friction in reciprocating nano-wear tests, probably due to the formation of protective oxide films during the wear process.
{"title":"Microstructural analysis, hardness evaluation and wear behavior of AlCoCrFeNiV and AlCo0.25CrNi1.75V high-entropy alloys","authors":"Carlos Alberto Souto , Ronaldo Câmara Cozza , Sydney F. Santos , Filipe Caldatto Dalan , Kátia Regina Cardoso","doi":"10.1016/j.wear.2024.205729","DOIUrl":"10.1016/j.wear.2024.205729","url":null,"abstract":"<div><div>In this study the development and characterization of the high-entropy alloys (HEAs) AlCoCrFeNiV and AlCo<sub>0.25</sub>CrNi<sub>1.75</sub>V for applications requiring high hardness, elastic modulus, and wear resistance was investigated. Both compositions were designed through thermodynamic calculations and empirical parameters, produced by electric arc melting, and subjected to homogenization heat treatments. X-ray diffraction demonstrated that both alloys are biphasic, featuring A2 and B2 structures. SEM analysis revealed that AlCoCrFeNiV in the as-cast (AC) condition exhibited large columnar grains, while heat treatment (HT) results in the precipitation of the A2 phase at the grain boundaries. In contrast, AlCo<sub>0.25</sub>CrNi<sub>1.75</sub>V exhibits a dendritic microstructure in both as-cast and heat-treated conditions. This alloy is composed of A2 and B2 phases, formed by spinodal decomposition. These microstructural differences significantly influenced the mechanical properties and wear resistance of the alloys. The more uniform microstructure of the equimolar alloy resulted in more stable hardness and elastic modulus values in both the as-cast and heat-treated conditions. Nanoindentation tests showed that AlCoCrFeNiV maintained stable hardness and elastic modulus after heat treatment, attributed to its more uniform microstructure. Conversely, AlCo<sub>0.25</sub>CrNi<sub>1.75</sub>V experienced a reduction in these properties after heat treatment, linked to its basket weave morphology, which led to a less uniform distribution of phases. Tribological tests revealed contrasting behaviors between the alloys: AlCoCrFeNiV exhibited superior wear resistance and a lower coefficient of friction in ball-cratering microabrasion, attributed to its uniform microstructure. In contrast, AlCo<sub>0.25</sub>CrNi<sub>1.75</sub>V demonstrated better wear resistance and a reduced coefficient of friction in reciprocating nano-wear tests, probably due to the formation of protective oxide films during the wear process.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205729"},"PeriodicalIF":5.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-02DOI: 10.1016/j.wear.2024.205731
Tao Wang , Jingze Wu , Yining Hu , Lei Zhou , Lei Zhu
Utilizing the oscillation laser deposition, nano-WC, micron-WC, and nano/micron-WC ceramic particle-reinforced Hastelloy-X(HX) composites were fabricated, a comprehensive analysis was conducted to investigate their microstructures, microhardness, wear performance, and tribological mechanisms. The results indicate that compared to HX, the microhardness of micron WC/HX and nano WC/HX composites increased by 24.81 %, 37.10 %, respectively. And the wear test of the tribological counterbody made of GCr15 is carried out under three different loads: 200N, 230N and 260N. They were calculated to have improved by an average of the anti-wear performance improved by 67.9 %, 73.0 %. In the composite microstructure, nano-WC particles completely dissolved, while micro-WC particles partially dissolved. The disparity in dissolution degree led to differences in the hardness and anti-wear strengthening mechanisms of the composites. TEM analysis revealed that the completely dissolved nano-WC formed recrystallized grain boundary phases composed of M6C, Cr7C3, and Laves phases, which significantly strengthened the hardness and anti-wear performance of material. Conversely, the reinforcement effect of micron-WC mainly stems from the unmelted particles formed by WC and W2C.
{"title":"Comparative investigation on anti-wear mechanism and properties of nano and micron WC reinforce Hastelloy-X composites using oscillating laser deposition","authors":"Tao Wang , Jingze Wu , Yining Hu , Lei Zhou , Lei Zhu","doi":"10.1016/j.wear.2024.205731","DOIUrl":"10.1016/j.wear.2024.205731","url":null,"abstract":"<div><div>Utilizing the oscillation laser deposition, nano-WC, micron-WC, and nano/micron-WC ceramic particle-reinforced Hastelloy-X(HX) composites were fabricated, a comprehensive analysis was conducted to investigate their microstructures, microhardness, wear performance, and tribological mechanisms. The results indicate that compared to HX, the microhardness of micron WC/HX and nano WC/HX composites increased by 24.81 %, 37.10 %, respectively. And the wear test of the tribological counterbody made of GCr15 is carried out under three different loads: 200N, 230N and 260N. They were calculated to have improved by an average of the anti-wear performance improved by 67.9 %, 73.0 %. In the composite microstructure, nano-WC particles completely dissolved, while micro-WC particles partially dissolved. The disparity in dissolution degree led to differences in the hardness and anti-wear strengthening mechanisms of the composites. TEM analysis revealed that the completely dissolved nano-WC formed recrystallized grain boundary phases composed of M<sub>6</sub>C, Cr<sub>7</sub>C<sub>3</sub>, and Laves phases, which significantly strengthened the hardness and anti-wear performance of material. Conversely, the reinforcement effect of micron-WC mainly stems from the unmelted particles formed by WC and W<sub>2</sub>C.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205731"},"PeriodicalIF":5.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
NiTi alloy fabricated by laser directed energy deposition (LDED) have gained widely attention in tribological applications. But the interplay effects of between superelasticity and hardness on the wear resistance are not clarified clearly. In this work, six NiTi sample with various superelasticity and hardness are fabricated using LDED to analyze the trade–off between the conflicting factors of superelasticity and hardness in terms of wear resistance under heavy load and high–speed condition. The ball–on–flat dry reciprocating sliding wear test are conducted on NiTi samples against an alumina ball. The result indicated that all samples are exhibited superelasticity of 17.6%–29.9 % and mean microhardness of 345–416HV0.5. Importantly, the effects on wear resistance obey the following rules: superelasticity > synergistic enhancement of superelasticity and hardness > hardness > superelasticity and hardness mutually restricted. Additionally, the wear resistance mechanism is discussed in depth via wear morphology and acoustic emission signal.
{"title":"Evalution of trade–off between superelasticity and hardness of NiTi alloy regarding wear resistance under heavy load and high–speed","authors":"Zhongxiong Kang, Deyin Kong, Chaorui Jiang, Mengqi Liu, Zhihui Zhang, Jie Zhao","doi":"10.1016/j.wear.2025.205732","DOIUrl":"10.1016/j.wear.2025.205732","url":null,"abstract":"<div><div>NiTi alloy fabricated by laser directed energy deposition (LDED) have gained widely attention in tribological applications. But the interplay effects of between superelasticity and hardness on the wear resistance are not clarified clearly. In this work, six NiTi sample with various superelasticity and hardness are fabricated using LDED to analyze the trade–off between the conflicting factors of superelasticity and hardness in terms of wear resistance under heavy load and high–speed condition. The ball–on–flat dry reciprocating sliding wear test are conducted on NiTi samples against an alumina ball. The result indicated that all samples are exhibited superelasticity of 17.6%–29.9 % and mean microhardness of 345–416HV<sub>0.5</sub>. Importantly, the effects on wear resistance obey the following rules: superelasticity > synergistic enhancement of superelasticity and hardness > hardness > superelasticity and hardness mutually restricted. Additionally, the wear resistance mechanism is discussed in depth via wear morphology and acoustic emission signal.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205732"},"PeriodicalIF":5.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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