Pub Date : 2024-02-05DOI: 10.1088/2051-672x/ad237e
Turali Narayana, Sheikh Shahid Saleem
In the present work, surface modification of Ti-6Al-4V alloy was carried out using Laser surface texturing (LST). The investigation aims to explore the synergetic impact of LST and molybdenum disulfide (MoS2), as a solid lubricant, on the tribological properties of Ti-6Al-4V alloy. Three types of LST textures (Circular, triangular, and square textures) were created on the Ti6Al4V alloy. Subsequently, tribological tests were conducted on a universal tribometer (ball-on-disc), at a load of 20 N with a frequency of 15 Hz. The worn surface was analyzed using various methods, including optical microscopy, 3D-profilometer, FESEM, EDAX analysis, and Raman spectroscopy. The study compared the coefficient of friction (COF) and wear behavior of un-textured surfaces (UTS) with those of textured surfaces (TS) under both dry sliding conditions (DSC) and lubricated sliding conditions (LSC). The results demonstrated a significant reduction in the COF and wear coefficients on the TS. Specifically, the circular texture exhibited significant results with a 10.30%, 10.42%, and 28.80% decrease in COF and a remarkable reduction of 39.22%, 47.51%, and 77.90% in wear coefficients compared to the UTS tested under DSC and LSC (using PAO-4 and PAO-4 + 1% wt MoS2). Severe abrasion, adhesion, and delamination as the primary wear mechanisms were observed on the UTS and TS under DSC, while the LSC was characterized by mild adhesive and delamination wear on the UTS and TS. The carbon layer formation and concentration of Mo and S particles resulted in lower friction and wear coefficients for the UTS, and TS under LSC (PAO-4 + 1% wt MoS2). The analysis indicated that the use of LST and solid lubricant nanoparticles on a Ti-6Al-4V alloy would result in improved service life and better endurance in cutting tools and tribo-mating parts.
{"title":"Synergetic effect of oleophilic textured surfaces and MoS2 on the tribological properties of Ti-6Al-4V alloy under dry and lubricated sliding conditions","authors":"Turali Narayana, Sheikh Shahid Saleem","doi":"10.1088/2051-672x/ad237e","DOIUrl":"https://doi.org/10.1088/2051-672x/ad237e","url":null,"abstract":"In the present work, surface modification of Ti-6Al-4V alloy was carried out using Laser surface texturing (LST). The investigation aims to explore the synergetic impact of LST and molybdenum disulfide (MoS<sub>2</sub>), as a solid lubricant, on the tribological properties of Ti-6Al-4V alloy. Three types of LST textures (Circular, triangular, and square textures) were created on the Ti6Al4V alloy. Subsequently, tribological tests were conducted on a universal tribometer (ball-on-disc), at a load of 20 N with a frequency of 15 Hz. The worn surface was analyzed using various methods, including optical microscopy, 3D-profilometer, FESEM, EDAX analysis, and Raman spectroscopy. The study compared the coefficient of friction (COF) and wear behavior of un-textured surfaces (U<sub>TS</sub>) with those of textured surfaces (T<sub>S</sub>) under both dry sliding conditions (D<sub>SC</sub>) and lubricated sliding conditions (L<sub>SC</sub>). The results demonstrated a significant reduction in the COF and wear coefficients on the T<sub>S</sub>. Specifically, the circular texture exhibited significant results with a 10.30%, 10.42%, and 28.80% decrease in COF and a remarkable reduction of 39.22%, 47.51%, and 77.90% in wear coefficients compared to the U<sub>TS</sub> tested under D<sub>SC</sub> and L<sub>SC</sub> (using PAO-4 and PAO-4 + 1% wt MoS<sub>2</sub>). Severe abrasion, adhesion, and delamination as the primary wear mechanisms were observed on the U<sub>TS</sub> and T<sub>S</sub> under D<sub>SC</sub>, while the L<sub>SC</sub> was characterized by mild adhesive and delamination wear on the U<sub>TS</sub> and T<sub>S</sub>. The carbon layer formation and concentration of Mo and S particles resulted in lower friction and wear coefficients for the U<sub>TS</sub>, and T<sub>S</sub> under L<sub>SC</sub> (PAO-4 + 1% wt MoS<sub>2</sub>). The analysis indicated that the use of LST and solid lubricant nanoparticles on a Ti-6Al-4V alloy would result in improved service life and better endurance in cutting tools and tribo-mating parts.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"17 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139756917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2024-01-09DOI: 10.1088/2051-672x/ad1c71
Huaian Yi, Jiefeng Huang, Ai-qin Shu, Kun Song
Deep learning can realize the self-extraction of grinding surface features so that end-to-end roughness measurement can be realized. Still, due to the grinding surface texture being random, the features are weak, the self-extracted grinding surface features of the same surface under different lighting environments are different, and the training data and the test data when the lighting environments are inconsistent with the recognition of the measurement of the accuracy of the lower. To address these issues, this paper proposes an adversarial domain self-adaptation (NMDANN) based visual measurement method for grinding surface roughness under variable illumination. An improved residual network is used as a generator to extract more effective metastable features, and multi-head attention is introduced into the domain discriminator to enhance its domain adaptive capability. The experimental results show that the method can recognize different grades of roughness on the grinding surface under changing light environments, laying the foundation for online visual measurement of grinding surface roughness under variable light environments.
{"title":"Recognition of grinding surface roughness grade based on adversarial domain adaptation under variable illumination","authors":"Huaian Yi, Jiefeng Huang, Ai-qin Shu, Kun Song","doi":"10.1088/2051-672x/ad1c71","DOIUrl":"https://doi.org/10.1088/2051-672x/ad1c71","url":null,"abstract":"\u0000 Deep learning can realize the self-extraction of grinding surface features so that end-to-end roughness measurement can be realized. Still, due to the grinding surface texture being random, the features are weak, the self-extracted grinding surface features of the same surface under different lighting environments are different, and the training data and the test data when the lighting environments are inconsistent with the recognition of the measurement of the accuracy of the lower. To address these issues, this paper proposes an adversarial domain self-adaptation (NMDANN) based visual measurement method for grinding surface roughness under variable illumination. An improved residual network is used as a generator to extract more effective metastable features, and multi-head attention is introduced into the domain discriminator to enhance its domain adaptive capability. The experimental results show that the method can recognize different grades of roughness on the grinding surface under changing light environments, laying the foundation for online visual measurement of grinding surface roughness under variable light environments.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"85 6","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139444708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-12-15DOI: 10.1088/2051-672x/ad1607
Avinash S, Vineeta Yadav, M. Duraiselvam
Laser shock peening (LSP) is emerging as an advanced technology to improve the fatigue life of engineering products. Also, this can improve wear and corrosion resistance as add-on benefits to the properties of the materials. In the present investigation, a systematic understanding of the hybrid surface treatment that combines LSP with ion nitriding, also known as plasma nitriding (PN) of precipitated hardened (PH) stainless steel was conducted to improve the effective case hardening layer. The effect of input parameters such as laser spot diameter, the number of superimposed layers, and overlap rate was investigated on the performance characteristics, which include surface morphology, microhardness, and the change in microstructure after the proposed treatment. The surface characterization results reveal that an 80% laser overlap rate modified the surface roughness of PN samples owing to higher surface roughness values induced by ablation during the LSP treatment. The microhardness and optical microscopy (OM) results revealed an increase in the effective hardening layer thickness of about 115% for a 40% overlap rate owing to the absence of blind spots. In addition, XRD analysis revealed the presence of Fe4N and CrN compounds on the surface of the PN samples. Scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) elemental mapping reveals the presence of a nitrogen-rich phase in the effective hardened layer and increased effective hardened layer thickness owing to grain refinement of LSP pre-processing.
{"title":"Effect of laser shock peening as a pretreatment on ion nitriding of precipitation hardened stainless steel","authors":"Avinash S, Vineeta Yadav, M. Duraiselvam","doi":"10.1088/2051-672x/ad1607","DOIUrl":"https://doi.org/10.1088/2051-672x/ad1607","url":null,"abstract":"\u0000 Laser shock peening (LSP) is emerging as an advanced technology to improve the fatigue life of engineering products. Also, this can improve wear and corrosion resistance as add-on benefits to the properties of the materials. In the present investigation, a systematic understanding of the hybrid surface treatment that combines LSP with ion nitriding, also known as plasma nitriding (PN) of precipitated hardened (PH) stainless steel was conducted to improve the effective case hardening layer. The effect of input parameters such as laser spot diameter, the number of superimposed layers, and overlap rate was investigated on the performance characteristics, which include surface morphology, microhardness, and the change in microstructure after the proposed treatment. The surface characterization results reveal that an 80% laser overlap rate modified the surface roughness of PN samples owing to higher surface roughness values induced by ablation during the LSP treatment. The microhardness and optical microscopy (OM) results revealed an increase in the effective hardening layer thickness of about 115% for a 40% overlap rate owing to the absence of blind spots. In addition, XRD analysis revealed the presence of Fe4N and CrN compounds on the surface of the PN samples. Scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) elemental mapping reveals the presence of a nitrogen-rich phase in the effective hardened layer and increased effective hardened layer thickness owing to grain refinement of LSP pre-processing.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"29 4","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138999791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-28DOI: 10.1088/2051-672x/ad0d79
Saravana Kumar P, Arun Pillai K V
μED-milling is an excellent micro machining process for machining of complex micro structures on conducting materials. In this paper, the feasibility of SiC nano powder mixed Pongamia BD as a dielectric medium while μED-milling of Inconel 718 alloy at different parametric settings namely capacitance (10 nf, 100 nf, 400 nf), powder concentration (0 g l−1, 0.1 g l−1, 0.3 g l−1) and voltage (120 v, 130 v, 140 v) is analysed. Further, the craters dimensions are correlated with the 3D roughness parameters (Spk, Sk and Svk) in this investigation. Lower settings of capacitance (10 nF) offered a maximum MRR (601767.1 μm3 s−1) compared to intermediate (398080.62 μm3 s−1) and higher (273498.29 μm3 s−1) settings of capacitance. MRR is increased around 1.3 times with Pongamia BD compared to SiC nano powder mixed Pongamia BD at considered parametric settings. Crater diameter is decreased by 24.1% with SiC nano powder mixed Pongamia BD due to lesser amount heat transfer to workpiece. Droplet angle of machined surface with SiC nano powder mixed Pongamia BD is 20% higher than Pongamia BD at considered parametric settings. Capacitance and voltage have the significant influence on crater diameter and roughness. Maximum MRR (1034239.41 μm3 s−1) is achieved with machining condition (10 nF, 120 V, 0 g l−1) for considered biodiesels. RLT appears to be higher around 27% with the processed surface of SiC nano powder mixed Pongamia BD as compared to Pongamia BD due to reaction of powder particles with work material. 3D roughness parameters (Spk, Sk and Svk) were greatly reduced due to inclusion of powder in biodiesels. Sk (core zone) are decreased (42.8%) with 0.3 g/l SiC nano powder mixed Pongamia BD compared to Pongamia BD.
{"title":"Experimental investigation on micro ED milling of inconel alloy with SiC nano powder mixed Pongamia BD at different parametric condition","authors":"Saravana Kumar P, Arun Pillai K V","doi":"10.1088/2051-672x/ad0d79","DOIUrl":"https://doi.org/10.1088/2051-672x/ad0d79","url":null,"abstract":"<italic toggle=\"yes\">μ</italic>ED-milling is an excellent micro machining process for machining of complex micro structures on conducting materials. In this paper, the feasibility of SiC nano powder mixed Pongamia BD as a dielectric medium while <italic toggle=\"yes\">μ</italic>ED-milling of Inconel 718 alloy at different parametric settings namely capacitance (10 nf, 100 nf, 400 nf), powder concentration (0 g l<sup>−1</sup>, 0.1 g l<sup>−1</sup>, 0.3 g l<sup>−1</sup>) and voltage (120 v, 130 v, 140 v) is analysed. Further, the craters dimensions are correlated with the 3D roughness parameters (Spk, Sk and Svk) in this investigation. Lower settings of capacitance (10 nF) offered a maximum MRR (601767.1 <italic toggle=\"yes\">μ</italic>m<sup>3</sup> s<sup>−1</sup>) compared to intermediate (398080.62 <italic toggle=\"yes\">μ</italic>m<sup>3</sup> s<sup>−1</sup>) and higher (273498.29 <italic toggle=\"yes\">μ</italic>m<sup>3</sup> s<sup>−1</sup>) settings of capacitance. MRR is increased around 1.3 times with Pongamia BD compared to SiC nano powder mixed Pongamia BD at considered parametric settings. Crater diameter is decreased by 24.1% with SiC nano powder mixed Pongamia BD due to lesser amount heat transfer to workpiece. Droplet angle of machined surface with SiC nano powder mixed Pongamia BD is 20% higher than Pongamia BD at considered parametric settings. Capacitance and voltage have the significant influence on crater diameter and roughness. Maximum MRR (1034239.41 <italic toggle=\"yes\">μ</italic>m<sup>3 </sup>s<sup>−1</sup>) is achieved with machining condition (10 nF, 120 V, 0 g l<sup>−1</sup>) for considered biodiesels. RLT appears to be higher around 27% with the processed surface of SiC nano powder mixed Pongamia BD as compared to Pongamia BD due to reaction of powder particles with work material. 3D roughness parameters (Spk, Sk and Svk) were greatly reduced due to inclusion of powder in biodiesels. Sk (core zone) are decreased (42.8%) with 0.3 g/l SiC nano powder mixed Pongamia BD compared to Pongamia BD.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"131 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The tribological properties of two mercaptoimidazolines, with amino (2-MBTA) and hydroxyl (2-MBTD) functional groups, as lubricating additives in a water-based rapeseed oil emulsion were investigated. The results of tribological tests on a four-ball tester showed that both mercaptoimidazolines had effective anti-wear and friction reduction properties. The optimal tribological performance of the 2-MBTD was found to be 98 N and could be scribed to the hydroxyl group, whereas the amino group in 2-MBTA created a more effective wear-reducing tribofilm on the rubbing surfaces at 294 N. EDS analysis on the worn surface areas showed that the difference in tribological properties between 2-MBTA and 2-MBTD was attributed to the different contents of the active elements N and S. In addition, XPS results indicated that sulfates were prevalent in the tribofilm for 2-MBTA, whereas sulfides that could reduce the coefficient of friction (COF) were present in the tribofilm for 2-MBTD. The friction mechanism of 2-MBTA and 2-MBTD is that different functional groups influence the composition of the boundary lubrication film formed, which in turn affects the tribological properties of the additives.
{"title":"Tribochemistry of mercaptoimidazoline as an additive in emulsion between self-mated GCr15 ball interfaces and its friction-reduction mechanism","authors":"Sier Kuang, Xiaoya Sun, Liping Xiong, Yinglei Wu, Lili Li, Lei Guo, zhongyi He, Renhui Zhang","doi":"10.1088/2051-672x/ad0ca0","DOIUrl":"https://doi.org/10.1088/2051-672x/ad0ca0","url":null,"abstract":"Abstract The tribological properties of two mercaptoimidazolines, with amino (2-MBTA) and hydroxyl (2-MBTD) functional groups, as lubricating additives in a water-based rapeseed oil emulsion were investigated. The results of tribological tests on a four-ball tester showed that both mercaptoimidazolines had effective anti-wear and friction reduction properties. The optimal tribological performance of the 2-MBTD was found to be 98 N and could be scribed to the hydroxyl group, whereas the amino group in 2-MBTA created a more effective wear-reducing tribofilm on the rubbing surfaces at 294 N. EDS analysis on the worn surface areas showed that the difference in tribological properties between 2-MBTA and 2-MBTD was attributed to the different contents of the active elements N and S. In addition, XPS results indicated that sulfates were prevalent in the tribofilm for 2-MBTA, whereas sulfides that could reduce the coefficient of friction (COF) were present in the tribofilm for 2-MBTD. The friction mechanism of 2-MBTA and 2-MBTD is that different functional groups influence the composition of the boundary lubrication film formed, which in turn affects the tribological properties of the additives.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"19 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134953572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-09DOI: 10.1088/2051-672x/ad0452
Rajaram S. Sutar, Bairu Shi, Susmita S. Kanchankoti, Sagar S. Ingole, Wahida S. Jamadar, Alsaba J. Sayyad, Priyanka B. Khot, Kishor Kumar Sadasivuni, Sanjay S. Latthe, shanhu liu, Appasaheb K. Bhosale
Abstract The lotus effect informs that self-cleaning superhydrophobic surfaces can be obtained by creating rough surface structures and modifying them with chemicals that have low surface energy. Herein, the composite of hydrophobic silica nanoparticles (SNPs) and polydimethylsiloxane (PDMS) was deposited on cotton fabric by multiple dip cycles. At optimal condition, the agglomerated SNPs in PDMS produces a hierarchical rough surface, as a result the coated cotton fabric has revealed a water contact angle (WCA) of 158.41 ± 1.58° and 4° of sliding angle. Due to negligible water adhesion to a superhydrophobic surface, coated cotton fabric reveals excellent self-cleaning behavior, which was tested by dust particles, muddy water and tea droplets. Furthermore, coated cotton fabric sustains superhydrophobicity over the mechanical robustness tests including adhesive tape peeling test, sandpaper abrasion test, and ultrasonication. Therefore, such an approach may be applicable in textile industries for self-cleaning purposes.
{"title":"Development of Self-cleaning Superhydrophobic Cotton Fabric through Silica/PDMS Composite Coating","authors":"Rajaram S. Sutar, Bairu Shi, Susmita S. Kanchankoti, Sagar S. Ingole, Wahida S. Jamadar, Alsaba J. Sayyad, Priyanka B. Khot, Kishor Kumar Sadasivuni, Sanjay S. Latthe, shanhu liu, Appasaheb K. Bhosale","doi":"10.1088/2051-672x/ad0452","DOIUrl":"https://doi.org/10.1088/2051-672x/ad0452","url":null,"abstract":"Abstract The lotus effect informs that self-cleaning superhydrophobic surfaces can be obtained by creating rough surface structures and modifying them with chemicals that have low surface energy. Herein, the composite of hydrophobic silica nanoparticles (SNPs) and polydimethylsiloxane (PDMS) was deposited on cotton fabric by multiple dip cycles. At optimal condition, the agglomerated SNPs in PDMS produces a hierarchical rough surface, as a result the coated cotton fabric has revealed a water contact angle (WCA) of 158.41 ± 1.58° and 4° of sliding angle. Due to negligible water adhesion to a superhydrophobic surface, coated cotton fabric reveals excellent self-cleaning behavior, which was tested by dust particles, muddy water and tea droplets. Furthermore, coated cotton fabric sustains superhydrophobicity over the mechanical robustness tests including adhesive tape peeling test, sandpaper abrasion test, and ultrasonication. Therefore, such an approach may be applicable in textile industries for self-cleaning purposes.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":" 67","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135191845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-09DOI: 10.1088/2051-672x/ad0b18
wei Zhang, Peibin Su, Minli Zheng, Lei Zhang, Fengsong Bai
Abstract The surface topography of the processed workpiece has a significant impact on its service performance, and the tool undergoes passive vibration due to the influence of milling forces during the machining process. This article focuses on the influence of milling parameters and tool passive vibration on the formation process of surface topography. Firstly, the forming mechanism of surface topography during passive vibration of cutting tools was studied, and a cutting edge motion trajectory model considering milling parameters and passive vibration of cutting tools was established; And the influence of milling parameters on surface topography with and without tool passive vibration was analyzed through experiments and simulations; A prediction model for the maximum height Sz and three-dimensional arithmetic mean height Sa of surface topography was established using least squares support vector machine (LSSVM). We used the Improved Particle Swarm Optimization (PSO) algorithm to search for optimal solutions for kernel width coefficients and regularization parameters in LSSVM, and wrote a program to improve the PSO-LSSVM prediction model. The results indicate that the proposed prediction model can provide a certain basis for the selection of actual milling experimental parameters.
{"title":"Analysis and prediction of surface topography characteristics and influence factors of tool passive vibration in milling process","authors":"wei Zhang, Peibin Su, Minli Zheng, Lei Zhang, Fengsong Bai","doi":"10.1088/2051-672x/ad0b18","DOIUrl":"https://doi.org/10.1088/2051-672x/ad0b18","url":null,"abstract":"Abstract The surface topography of the processed workpiece has a significant impact on its service performance, and the tool undergoes passive vibration due to the influence of milling forces during the machining process. This article focuses on the influence of milling parameters and tool passive vibration on the formation process of surface topography. Firstly, the forming mechanism of surface topography during passive vibration of cutting tools was studied, and a cutting edge motion trajectory model considering milling parameters and passive vibration of cutting tools was established; And the influence of milling parameters on surface topography with and without tool passive vibration was analyzed through experiments and simulations; A prediction model for the maximum height Sz and three-dimensional arithmetic mean height Sa of surface topography was established using least squares support vector machine (LSSVM). We used the Improved Particle Swarm Optimization (PSO) algorithm to search for optimal solutions for kernel width coefficients and regularization parameters in LSSVM, and wrote a program to improve the PSO-LSSVM prediction model. The results indicate that the proposed prediction model can provide a certain basis for the selection of actual milling experimental parameters.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":" 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135192319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-09DOI: 10.1088/2051-672x/ad0b17
Bo Lin, Li Zhang, Meng Cai, Jingfen Lu, Jianing Yin, Yu Huang, Yihan Zhang, Xiaoqiang Fan, Min-Hao Zhu
Abstract The synergy of tribology design and surface engineering is vitally important for fulfilling the long-term anti-wear requirements of mechanical equipment. Here, Q345 steel was processed by shot peening (SP) for forming a volcano-like hardened layer (77.72 HV) with high surface roughness (3.77 μm) and low residual tensile stress (210.75 MPa). Then, a zinc-rich epoxy coating was painted on SP-strengthened Q345 steel to construct the double-layer protection. The double-layer system shows excellent tribological behaviors, especially wear resistance being reduced by 76.50% and 38.75%, respectively, with Q345 steel and that sprayed by epoxy coating as a comparison. Crucially, SP layer plays a role in mechanical support, while epoxy coating acts as a cushion to friction force, thus achieving the synergy for enhancing the anti-friction/wear abilities.
{"title":"Synergistic anti-wear performance of zinc-rich epoxy coating on shot peening strengthened Q345 steel","authors":"Bo Lin, Li Zhang, Meng Cai, Jingfen Lu, Jianing Yin, Yu Huang, Yihan Zhang, Xiaoqiang Fan, Min-Hao Zhu","doi":"10.1088/2051-672x/ad0b17","DOIUrl":"https://doi.org/10.1088/2051-672x/ad0b17","url":null,"abstract":"Abstract The synergy of tribology design and surface engineering is vitally important for fulfilling the long-term anti-wear requirements of mechanical equipment. Here, Q345 steel was processed by shot peening (SP) for forming a volcano-like hardened layer (77.72 HV) with high surface roughness (3.77 μm) and low residual tensile stress (210.75 MPa). Then, a zinc-rich epoxy coating was painted on SP-strengthened Q345 steel to construct the double-layer protection. The double-layer system shows excellent tribological behaviors, especially wear resistance being reduced by 76.50% and 38.75%, respectively, with Q345 steel and that sprayed by epoxy coating as a comparison. Crucially, SP layer plays a role in mechanical support, while epoxy coating acts as a cushion to friction force, thus achieving the synergy for enhancing the anti-friction/wear abilities.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":" 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135192328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-10-16DOI: 10.1088/2051-672x/ad00ce
Jitendra Basrani, Manoj Kumar, Pramod Kumar
Abstract The aim of this study is to examine the stress–strain behavior of Glass Fibre Reinforced Polymer (GFRP) composite with three different orientations, namely [0°/90°]s, [±45]s, [0°/+45°/−45°/90°] T . To achieve this, the GFRP was simulated using the Split Hopkinson Bar (SHPB) setup in ABAQUS/CAE. The striker bar was used at three different velocities (9.7 m s −1 , 12.7 m s −1 , and 14.3 m s −1 ) to produce strain rates ranging from 1000 s −1 to 2000 s −1 . The dynamic response of the GFRP composite was studied by considering its stress–strain behavior. The effect of strain rate on the elastic modulus and energy absorption capacity of GFRP laminates was analyzed through complete stress versus strain curves. The results showed that the elastic modulus and energy absorption capacity of GFRP laminates were sensitive to strain rates, with an increase in strain rate leading to an increase in the elastic modulus and energy absorption capacity.
摘要本研究的目的是研究玻璃纤维增强聚合物(GFRP)复合材料在[0°/90°]s、[±45]s、[0°/+45°/−45°/90°]T三种不同取向下的应力应变行为。为了实现这一点，使用ABAQUS/CAE中的Split Hopkinson Bar (SHPB)设置对GFRP进行了模拟。在三种不同的速度下(9.7 m s−1、12.7 m s−1和14.3 m s−1)使用冲击杆，产生的应变率范围从1000 s−1到2000 s−1。考虑GFRP复合材料的应力-应变特性，对其动力响应进行了研究。通过完整的应力应变曲线分析了应变率对玻璃钢复合材料弹性模量和吸能能力的影响。结果表明:GFRP复合材料的弹性模量和吸能能力对应变速率敏感，应变速率的增大导致弹性模量和吸能能力的增大;
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Abstract Surface texturing is recognized as an effective solution for reducing friction on stainless-steel contact interfaces. Previous studies mainly focused on the influence of the texture parameters and lubricant-film depths on their tribology performances. Notably, whether the lubricant can penetrate texture and the lubricant infiltration capacity may significantly affect the tribology performances of the contact interfaces. They have been rarely considered, which may cause some well-designed textures to fail to perform their roles and be abandoned. Herein, a novel lubricant model is developed to explore the tribology performances of the contact interfaces with different lubricant infiltration capacities in textures and the influence factors of the lubricant infiltration capacities. Textured surfaces with different dimensions are fabricated by the femtosecond laser to explore the effects of the texture dimensions on the lubricant infiltration capacities. The results indicate that texture width, depth and lubricant viscosity could significantly affect the lubricant infiltration capacities. Moreover, the results indicate that the lubricant infiltration capacity would significantly affect the tribology performances of the contact interfaces. This work indicates that the impact of the lubricant infiltration should be considered in texture design. This work can be widely used to guide the texture design applied in plenty of fields.
{"title":"Effect of lubricant infiltration into the groove-like surface texture on the friction response of the textured stainless-steel contact surface","authors":"Dinghuai Yang, Jian Cheng, Linjie Zhao, Mingjun Chen, Henan Liu, Jinghe Wang, Chengshun Han, Yazhou Sun","doi":"10.1088/2051-672x/acfc5a","DOIUrl":"https://doi.org/10.1088/2051-672x/acfc5a","url":null,"abstract":"Abstract Surface texturing is recognized as an effective solution for reducing friction on stainless-steel contact interfaces. Previous studies mainly focused on the influence of the texture parameters and lubricant-film depths on their tribology performances. Notably, whether the lubricant can penetrate texture and the lubricant infiltration capacity may significantly affect the tribology performances of the contact interfaces. They have been rarely considered, which may cause some well-designed textures to fail to perform their roles and be abandoned. Herein, a novel lubricant model is developed to explore the tribology performances of the contact interfaces with different lubricant infiltration capacities in textures and the influence factors of the lubricant infiltration capacities. Textured surfaces with different dimensions are fabricated by the femtosecond laser to explore the effects of the texture dimensions on the lubricant infiltration capacities. The results indicate that texture width, depth and lubricant viscosity could significantly affect the lubricant infiltration capacities. Moreover, the results indicate that the lubricant infiltration capacity would significantly affect the tribology performances of the contact interfaces. This work indicates that the impact of the lubricant infiltration should be considered in texture design. This work can be widely used to guide the texture design applied in plenty of fields.","PeriodicalId":22028,"journal":{"name":"Surface Topography: Metrology and Properties","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136057792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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