The (La0.5Eu0.25Y0.25)2Zr2O7 (LEYZ) ceramic powder for spraying was prepared and synthesised by combining spray granulation and solid phase reaction phase, and a double ceramic layer structure with (La0.5Eu0.25Y0.25)2Zr2O7 ceramic surface coating and YSZ intermediate coating was prepared by atmospheric plasma spraying. Experimental characterisation revealed that the moulding state of spray granulated powders was significantly influenced by the solid content. When the solid content is small, the viscosity of the slurry is insufficient, and the prepared powder has poor formability and small overall particle size. When the solid content is large, the slurry is too viscous, which easily leads to unfavourable conditions such as sticky walls. The best formability of the pelletised powder was obtained with a solid content of 55 wt-% and a binder content of 2.0 wt-%. Compared with La2Zr2O7 (LZ) ceramics, the fracture toughness of the rare-earth co-doped modified LEYZ ceramic coating was increased by 8.4% and the bond strength was increased by 49.9%, showing good toughness and crack resistance. Moreover, LEYZ coating has significantly better resistance to solid phase particle erosion than LZ coating, with 46.3% and 45.4% reduction in erosion rate at 45° and 90°, respectively.
{"title":"Synthesis and coating properties of (La0.5Eu0.25Y0.25)2Zr2O7 ceramic powder","authors":"Chao Yan, Xiufang Cui, Yongzhi Jing, Zhuo Chen, Rui Wang, Guo Jin, Jinna Liu","doi":"10.1177/02670836241247751","DOIUrl":"https://doi.org/10.1177/02670836241247751","url":null,"abstract":"The (La0.5Eu0.25Y0.25)2Zr2O7 (LEYZ) ceramic powder for spraying was prepared and synthesised by combining spray granulation and solid phase reaction phase, and a double ceramic layer structure with (La0.5Eu0.25Y0.25)2Zr2O7 ceramic surface coating and YSZ intermediate coating was prepared by atmospheric plasma spraying. Experimental characterisation revealed that the moulding state of spray granulated powders was significantly influenced by the solid content. When the solid content is small, the viscosity of the slurry is insufficient, and the prepared powder has poor formability and small overall particle size. When the solid content is large, the slurry is too viscous, which easily leads to unfavourable conditions such as sticky walls. The best formability of the pelletised powder was obtained with a solid content of 55 wt-% and a binder content of 2.0 wt-%. Compared with La2Zr2O7 (LZ) ceramics, the fracture toughness of the rare-earth co-doped modified LEYZ ceramic coating was increased by 8.4% and the bond strength was increased by 49.9%, showing good toughness and crack resistance. Moreover, LEYZ coating has significantly better resistance to solid phase particle erosion than LZ coating, with 46.3% and 45.4% reduction in erosion rate at 45° and 90°, respectively.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140663282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-22DOI: 10.1177/02670836241245205
G. Scampone, G. Timelli
To study the influence of the surface roughness and eutectic silicon segregation on the anodising of diecast Al-Si-Cu alloys, an AlSi11Cu2(Fe) alloy was high-pressure diecast and hard anodised. The microstructure and surface topography of milled and grit-blasted regions were investigated to analyse their effect on the growth of the anodic layer. The surface mechanical properties of the anodised surfaces were also studied. The results showed how high surface roughness and silicon segregation present in the grit-blasted surface hindered the thickening of the oxide layer. After anodising, the milled surface exhibited better mechanical properties than the grit-blasted one. The wear resistance was enhanced by a thicker anodic layer, while the scratch resistance was positively affected by a lower surface roughness.
{"title":"Effect of surface roughness and eutectic segregation on anodising of Al-Si-Cu alloys","authors":"G. Scampone, G. Timelli","doi":"10.1177/02670836241245205","DOIUrl":"https://doi.org/10.1177/02670836241245205","url":null,"abstract":"To study the influence of the surface roughness and eutectic silicon segregation on the anodising of diecast Al-Si-Cu alloys, an AlSi11Cu2(Fe) alloy was high-pressure diecast and hard anodised. The microstructure and surface topography of milled and grit-blasted regions were investigated to analyse their effect on the growth of the anodic layer. The surface mechanical properties of the anodised surfaces were also studied. The results showed how high surface roughness and silicon segregation present in the grit-blasted surface hindered the thickening of the oxide layer. After anodising, the milled surface exhibited better mechanical properties than the grit-blasted one. The wear resistance was enhanced by a thicker anodic layer, while the scratch resistance was positively affected by a lower surface roughness.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140673479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-18DOI: 10.1177/02670836241247721
Yun Zou, Rongtao Shen, Yang Lian, Yang Li
The effects of thermo-mechanical treatment on the mechanical properties and corrosion resistance behaviour of the (FeCoNiCr)92Ti3.5Al4.5 (at.-%) high-entropy alloy (HEA) were studied. Compared with the untreated specimen, the yield and ultimate tensile strength increased by 227.5% and 129.4% after thermo-mechanical treatment, with ductility remaining almost constant. The results indicated that the grain size refined from 233.44 to 2.31 μm, and the dislocation density considerably increased from 2.69 × 1012 to 1.23 × 1014. Notably, after thermo-mechanical treatment, the formation of precipitates can narrow the passivation zone, thus increasing the tendency of pitting corrosion. The corrosion current decreased and the radius of the impedance curve increased, indicating the corrosion resistance behaviour improved, which was attributed to the grain refinement.
{"title":"Enhancement of strength–ductility combination and corrosion resistance behaviour in (FeCoNiCr)92Ti3.5Al4.5 high-entropy alloy","authors":"Yun Zou, Rongtao Shen, Yang Lian, Yang Li","doi":"10.1177/02670836241247721","DOIUrl":"https://doi.org/10.1177/02670836241247721","url":null,"abstract":"The effects of thermo-mechanical treatment on the mechanical properties and corrosion resistance behaviour of the (FeCoNiCr)92Ti3.5Al4.5 (at.-%) high-entropy alloy (HEA) were studied. Compared with the untreated specimen, the yield and ultimate tensile strength increased by 227.5% and 129.4% after thermo-mechanical treatment, with ductility remaining almost constant. The results indicated that the grain size refined from 233.44 to 2.31 μm, and the dislocation density considerably increased from 2.69 × 1012 to 1.23 × 1014. Notably, after thermo-mechanical treatment, the formation of precipitates can narrow the passivation zone, thus increasing the tendency of pitting corrosion. The corrosion current decreased and the radius of the impedance curve increased, indicating the corrosion resistance behaviour improved, which was attributed to the grain refinement.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140689319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-18DOI: 10.1177/02670836241246663
Yang Qu, Qi Zhao, Dongwei Ma
In this work, a three-dimensional crystal plasticity (CP) model was constructed to study the texture evolution behaviour and stress distribution of AA2024 alloy under uniaxial tensile conditions. After parameter calibration, the accuracy of simulated stress–strain curve reached 98.82%, and with good convergence. It was found that the {111} plane dots of Brass in (111) pole figure predominantly prolong at an angle of approximately 35.8° with respect to the RD, while those of Copper, S, Goss and Cube scatter towards almost all directions by the way in a circular augmentation. Moreover, it was revealed that Brass orientation is more conducive to alleviating stress during deformation process, while Copper is the least effective. The situations for Cube and Goss orientations are similar.
{"title":"Texture evolution and stress formation behaviour during tensile deformation using crystalplasticity finite element method","authors":"Yang Qu, Qi Zhao, Dongwei Ma","doi":"10.1177/02670836241246663","DOIUrl":"https://doi.org/10.1177/02670836241246663","url":null,"abstract":"In this work, a three-dimensional crystal plasticity (CP) model was constructed to study the texture evolution behaviour and stress distribution of AA2024 alloy under uniaxial tensile conditions. After parameter calibration, the accuracy of simulated stress–strain curve reached 98.82%, and with good convergence. It was found that the {111} plane dots of Brass in (111) pole figure predominantly prolong at an angle of approximately 35.8° with respect to the RD, while those of Copper, S, Goss and Cube scatter towards almost all directions by the way in a circular augmentation. Moreover, it was revealed that Brass orientation is more conducive to alleviating stress during deformation process, while Copper is the least effective. The situations for Cube and Goss orientations are similar.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fe-based amorphous coatings (AMCs) were deposited using detonation spraying technology to investigate its performance in high-temperature wear conditions. The results indicate that the detonation-sprayed Fe-based AMC possesses a dense structure, low porosity, high amorphous phase content. At 300 °C, the coating has a maximum wear rate of 6.53 × 10−6 mm3 N−1 m−1, which is almost three times that at room temperature. The main wear mechanisms are oxidative wear, accompanied by fatigue stripping wear and adhesive wear. At 500 °C, the wear scar surface demonstrates increased toughness, resisting plastic deformation due to high-temperature softening. Additionally, partial crystallisation occurs, leading to an overall increase in the hardness of coating. Combined, these factors reduce the wear rate of the coating.
{"title":"Tribological behaviour of Fe-based amorphous coating at elevated temperatures","authors":"Yongkang Zhang, Haimin Zhai, Yu Bian, Wensheng Li, S. Cui, Zhornik Viktor, Uladzimir Seniuts","doi":"10.1177/02670836241247739","DOIUrl":"https://doi.org/10.1177/02670836241247739","url":null,"abstract":"Fe-based amorphous coatings (AMCs) were deposited using detonation spraying technology to investigate its performance in high-temperature wear conditions. The results indicate that the detonation-sprayed Fe-based AMC possesses a dense structure, low porosity, high amorphous phase content. At 300 °C, the coating has a maximum wear rate of 6.53 × 10−6 mm3 N−1 m−1, which is almost three times that at room temperature. The main wear mechanisms are oxidative wear, accompanied by fatigue stripping wear and adhesive wear. At 500 °C, the wear scar surface demonstrates increased toughness, resisting plastic deformation due to high-temperature softening. Additionally, partial crystallisation occurs, leading to an overall increase in the hardness of coating. Combined, these factors reduce the wear rate of the coating.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140691125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High-manganese steels, due to their unique combination of strength and elongation, have been widely used in aerospace, petrochemical and rail transportation. However, a prevalent challenge in advancing the utilization of high-manganese steel is the need for corresponding welding consumables. The deformation mechanism of high-manganese steel encompasses three primary mechanisms: martensitic phase transformation, twinning and dislocation movement. The stacking fault energy (SFE) is a critical factor in determining the dominant deformation mechanism in high-manganese austenitic steels. Furthermore, the magnitude of the SFE is principally influenced by the alloying elements present and the temperature at which deformation occurs. Alloying elements can significantly influence the microstructure and mechanical properties of wire arc additive manufacturing (WAAM) of high-manganese steels. The metal powder-cored wire of high-manganese steel with full austenitic microstructure was designed in this paper. The effects of C, Mn and Cu on the microstructure, solute segregation and properties of WAAM of high-manganese steels were systematically investigated by optical microscopy, electron microscopy and mechanical testing. The influence of SFE on the microstructure characteristics and work hardening behaviour were also studied. The results showed that as an increase of the C content, the tensile strength and elongation of deposited metals were improved. The corresponding low-temperature impact toughness increased at first and then decreased. The highest value of impact toughness was 68.5 J with 0.79%C. As the Mn increased, the strength decreased, the elongation increased and the low-temperature impact toughness value displayed an initial increase followed by a subsequent decrease. With the increase of Cu, the yield strength and elongation improved significantly. The tensile strength exhibited a marginal initial increase followed by a decrease, whereas the change was not substantial. In contrast, the low-temperature impact toughness value showed a substantial increase followed by a decrease. The developed M3 wire containing 1.10%C-21%Mn-0.3%Cu possessed the optimum performance (yield strength of 551 MPa, tensile strength of 909 MPa, elongation at break of 30.2%, impact toughness value of 57.5J), with the good mechanical stability and low solidification cracking sensitivity.
{"title":"Effect of C-Mn-Cu on microstructure and properties of wire arc additive manufacturing of high-manganese steels","authors":"Jingjing Peng, Tianli Zhang, Lianyong Xu, Geng Chen, Donghai Hu, Zhiming Zhu, Jianguo Ma, Kou Sindo","doi":"10.1177/02670836241242566","DOIUrl":"https://doi.org/10.1177/02670836241242566","url":null,"abstract":"High-manganese steels, due to their unique combination of strength and elongation, have been widely used in aerospace, petrochemical and rail transportation. However, a prevalent challenge in advancing the utilization of high-manganese steel is the need for corresponding welding consumables. The deformation mechanism of high-manganese steel encompasses three primary mechanisms: martensitic phase transformation, twinning and dislocation movement. The stacking fault energy (SFE) is a critical factor in determining the dominant deformation mechanism in high-manganese austenitic steels. Furthermore, the magnitude of the SFE is principally influenced by the alloying elements present and the temperature at which deformation occurs. Alloying elements can significantly influence the microstructure and mechanical properties of wire arc additive manufacturing (WAAM) of high-manganese steels. The metal powder-cored wire of high-manganese steel with full austenitic microstructure was designed in this paper. The effects of C, Mn and Cu on the microstructure, solute segregation and properties of WAAM of high-manganese steels were systematically investigated by optical microscopy, electron microscopy and mechanical testing. The influence of SFE on the microstructure characteristics and work hardening behaviour were also studied. The results showed that as an increase of the C content, the tensile strength and elongation of deposited metals were improved. The corresponding low-temperature impact toughness increased at first and then decreased. The highest value of impact toughness was 68.5 J with 0.79%C. As the Mn increased, the strength decreased, the elongation increased and the low-temperature impact toughness value displayed an initial increase followed by a subsequent decrease. With the increase of Cu, the yield strength and elongation improved significantly. The tensile strength exhibited a marginal initial increase followed by a decrease, whereas the change was not substantial. In contrast, the low-temperature impact toughness value showed a substantial increase followed by a decrease. The developed M3 wire containing 1.10%C-21%Mn-0.3%Cu possessed the optimum performance (yield strength of 551 MPa, tensile strength of 909 MPa, elongation at break of 30.2%, impact toughness value of 57.5J), with the good mechanical stability and low solidification cracking sensitivity.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140692414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tempering a medium carbon carbide-free bainite steel led to two distinct microstructures and properties below and above the bainitic start (Bs) temperature. Austenite decomposition during tempering, depended on carbon content, tempering temperatures and time, determining retained austenite (RA) stability. Up to 400 °C, most RA remained intact, but a significant reduction occurred above the Bs temperature. Film austenite primarily turned into carbides within the bainitic–ferrite matrix and form lines of carbide particles, while blocky austenite decomposed into troostite at 500 °C and sorbite at 600 °C. During tempering, on the other hand, bainitic ferrite lost tetragonality losing its carbon and resulting in the growth of bainitic–ferrite plates through grain boundary migration and misorientation annihilation. Above Bs, drastic microstructural changes caused significant alterations in tensile properties.
{"title":"Microstructure and property evolution during tempering of a medium carbon bainitic steel","authors":"Sumanta Mandal, Pampa Ghosh, Ajeet Singh Rajput, Sonu Yadav, Arunansu Haldar","doi":"10.1177/02670836241240370","DOIUrl":"https://doi.org/10.1177/02670836241240370","url":null,"abstract":"Tempering a medium carbon carbide-free bainite steel led to two distinct microstructures and properties below and above the bainitic start (Bs) temperature. Austenite decomposition during tempering, depended on carbon content, tempering temperatures and time, determining retained austenite (RA) stability. Up to 400 °C, most RA remained intact, but a significant reduction occurred above the Bs temperature. Film austenite primarily turned into carbides within the bainitic–ferrite matrix and form lines of carbide particles, while blocky austenite decomposed into troostite at 500 °C and sorbite at 600 °C. During tempering, on the other hand, bainitic ferrite lost tetragonality losing its carbon and resulting in the growth of bainitic–ferrite plates through grain boundary migration and misorientation annihilation. Above Bs, drastic microstructural changes caused significant alterations in tensile properties.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-15DOI: 10.1177/02670836241245817
Mengyuan Xia, Hui-wen Zhu, B. Yu, Li Zheng, Shunning Lv, Lei Li, Tao Huang
The WE43-0.5Ca alloy was processed by the combination of extrusion, ageing treatment and rolling in the present study. The results showed that the strength of the alloy is better at an extrusion temperature of 470 °C. The alloy was then subjected to ageing treatment. The alloy aged for 14 h had the highest strength. However, there was still a high amount of the second phase enriched at the shear bands. The as-extruded state alloy was rolled. The strength of the alloy in the rolled state was significantly increased. Broken into fine second-phase particles during rolling, these second-phase particles are diffusely distributed in the matrix, resulting in second-phase strengthening that enhances the strength of the alloy.
{"title":"Influence of second phase precipitates on the microstructure and mechanical properties of WE43-0.5Ca alloy during hot deformation process","authors":"Mengyuan Xia, Hui-wen Zhu, B. Yu, Li Zheng, Shunning Lv, Lei Li, Tao Huang","doi":"10.1177/02670836241245817","DOIUrl":"https://doi.org/10.1177/02670836241245817","url":null,"abstract":"The WE43-0.5Ca alloy was processed by the combination of extrusion, ageing treatment and rolling in the present study. The results showed that the strength of the alloy is better at an extrusion temperature of 470 °C. The alloy was then subjected to ageing treatment. The alloy aged for 14 h had the highest strength. However, there was still a high amount of the second phase enriched at the shear bands. The as-extruded state alloy was rolled. The strength of the alloy in the rolled state was significantly increased. Broken into fine second-phase particles during rolling, these second-phase particles are diffusely distributed in the matrix, resulting in second-phase strengthening that enhances the strength of the alloy.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140699956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-13DOI: 10.1177/02670836241245811
Vikesh Kumar, Nilesh K. Kumbhar, Manoj D. Joshi, Yuan-Ron Ma, Indrasen Singh, S. Hosmani
This study thoroughly examines the influence of conventional and selective laser melting (SLM) routes and surface mechanical attrition treatment (SMAT) on the microstructural and electrochemical properties of 316L steel. Compared to wrought specimens, the SLM specimens exhibit significantly smaller grains (∼41 vs. ∼83 µm) and higher dislocation density (∼7.2 × 1013 vs. ∼3.7 × 1012 m−2). Both specimens show nearly doubled surface hardness after SMAT, with the SLM surface displaying a ∼30 nm grain size and minimal α’ phase. The microstructure significantly influences passivation and corrosion behaviour. The SLM specimens exhibit superior electrochemical characteristics to wrought counterparts in SMATed (0.00299 mmpy) and non-SMATed (0.00771 mmpy) conditions. SMAT effectively eliminates surface porosity, enhancing the passivation and corrosion resistance of SLM steel.
{"title":"Microstructural and electrochemical behaviour of severely surface-deformed 316L steel manufactured by conventional and selective laser melting routes","authors":"Vikesh Kumar, Nilesh K. Kumbhar, Manoj D. Joshi, Yuan-Ron Ma, Indrasen Singh, S. Hosmani","doi":"10.1177/02670836241245811","DOIUrl":"https://doi.org/10.1177/02670836241245811","url":null,"abstract":"This study thoroughly examines the influence of conventional and selective laser melting (SLM) routes and surface mechanical attrition treatment (SMAT) on the microstructural and electrochemical properties of 316L steel. Compared to wrought specimens, the SLM specimens exhibit significantly smaller grains (∼41 vs. ∼83 µm) and higher dislocation density (∼7.2 × 1013 vs. ∼3.7 × 1012 m−2). Both specimens show nearly doubled surface hardness after SMAT, with the SLM surface displaying a ∼30 nm grain size and minimal α’ phase. The microstructure significantly influences passivation and corrosion behaviour. The SLM specimens exhibit superior electrochemical characteristics to wrought counterparts in SMATed (0.00299 mmpy) and non-SMATed (0.00771 mmpy) conditions. SMAT effectively eliminates surface porosity, enhancing the passivation and corrosion resistance of SLM steel.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140708229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-13DOI: 10.1177/02670836241245214
Matthew Mills, Meurig Thomas
This paper presents a survey of the published high-cycle fatigue (hcf) data for the nickel–iron superalloy alloy 718 fabricated by additive manufacture. Approximately 680 fatigue data points were collected from the published literature and the reported data are presented in the form of stress versus cycles to failure curves for load ratios of R = −1, 0 and 0.1. Following this, curves showing estimated survival probabilities of 0.5, 0.95 and 0.99 are constructed using a statistical analysis based on the Weibull probability density function. Finally, a comparison between the fatigue performance of additively manufactured and wrought alloy 718 under fully reversed loading conditions ( R = −1) is provided.
{"title":"A survey of the high-cycle fatigue performance of additively manufactured alloy 718","authors":"Matthew Mills, Meurig Thomas","doi":"10.1177/02670836241245214","DOIUrl":"https://doi.org/10.1177/02670836241245214","url":null,"abstract":"This paper presents a survey of the published high-cycle fatigue (hcf) data for the nickel–iron superalloy alloy 718 fabricated by additive manufacture. Approximately 680 fatigue data points were collected from the published literature and the reported data are presented in the form of stress versus cycles to failure curves for load ratios of R = −1, 0 and 0.1. Following this, curves showing estimated survival probabilities of 0.5, 0.95 and 0.99 are constructed using a statistical analysis based on the Weibull probability density function. Finally, a comparison between the fatigue performance of additively manufactured and wrought alloy 718 under fully reversed loading conditions ( R = −1) is provided.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140707040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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