Pub Date : 2021-04-12DOI: 10.1080/17515831.2021.1898899
L. B. Varela, M.F.C. Ordoñez, C. Pinedo, A. P. Tschiptschin
ABSTRACT In this study, the microabrasive wear of a plasma nitrided Inconel 625 superalloy was studied. Nitrogen supersaturation in the expanded FCC layer promoted hardening due to the higher compressive residual stresses. The results showed the formation of a nitrided layer consisting of nitrogen expanded FCC phase (γN) and CrN nitride, respectively. Friction coefficient, mechanical failure mode and critical loads for damaging the nitrided case, using the linear scratch test, were carried out at a linearly increased normal force. The scratch test results showed that the nitrided layer strongly decreased the apparent friction coefficient in comparison with the non-nitrided alloy. Tensile cracking was the prevalent mechanical failure mode of the nitrided layer. Microabrasion results showed that the nitriding layer improving the wear resistance. For the nitrided samples, wear coefficients were determined for the nitrided layer and the substrate, indicating a change in the wear volume loss rate with the test distance. GRAPHICAL ABSTRACT
{"title":"Micro-abrasive wear study of a low-temperature plasma nitrided Inconel 625 superalloy","authors":"L. B. Varela, M.F.C. Ordoñez, C. Pinedo, A. P. Tschiptschin","doi":"10.1080/17515831.2021.1898899","DOIUrl":"https://doi.org/10.1080/17515831.2021.1898899","url":null,"abstract":"ABSTRACT In this study, the microabrasive wear of a plasma nitrided Inconel 625 superalloy was studied. Nitrogen supersaturation in the expanded FCC layer promoted hardening due to the higher compressive residual stresses. The results showed the formation of a nitrided layer consisting of nitrogen expanded FCC phase (γN) and CrN nitride, respectively. Friction coefficient, mechanical failure mode and critical loads for damaging the nitrided case, using the linear scratch test, were carried out at a linearly increased normal force. The scratch test results showed that the nitrided layer strongly decreased the apparent friction coefficient in comparison with the non-nitrided alloy. Tensile cracking was the prevalent mechanical failure mode of the nitrided layer. Microabrasion results showed that the nitriding layer improving the wear resistance. For the nitrided samples, wear coefficients were determined for the nitrided layer and the substrate, indicating a change in the wear volume loss rate with the test distance. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"16 1","pages":"119 - 129"},"PeriodicalIF":1.3,"publicationDate":"2021-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2021.1898899","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49584015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-12DOI: 10.1080/17515831.2021.1898887
S. Rukhande, W. Rathod, D. Bhosale
ABSTRACT In numerous high-temperature applications like hot forming, power generation and aerospace, many components are coated by thermal spraying to counter wear and high-temperature oxidation. In this paper, the unidirectional dry sliding wear and friction behaviour of APS (atmospheric plasma spray) and HVOF (high velocity oxy-fuel) sprayed NiCrBSiFe coatings have been investigated at 300, 500, and 700°C temperature. The high-temperature dry sliding wear tests were performed at 18 m/min sliding velocity, 10 N normal load, and silicon nitride (1580 HV0.3) as counter material on the pin on disc tribometer, as per ASTM G99 standard. The specific wear rate and the coefficient of friction were compared to assess the behaviour of APS and HVOF coatings. For both coatings, the specific wear rates increased with the temperature. As compared to the APS coating, the HVOF coating had enhanced wear resistance at high-temperature, due to the close packed partially melted particles, low oxide inclusion, low porosity and high hardness. GRAPHICAL ABSTRACT
{"title":"High-temperature tribological investigation of APS and HVOF sprayed NiCrBSiFe coatings on SS 316L","authors":"S. Rukhande, W. Rathod, D. Bhosale","doi":"10.1080/17515831.2021.1898887","DOIUrl":"https://doi.org/10.1080/17515831.2021.1898887","url":null,"abstract":"ABSTRACT In numerous high-temperature applications like hot forming, power generation and aerospace, many components are coated by thermal spraying to counter wear and high-temperature oxidation. In this paper, the unidirectional dry sliding wear and friction behaviour of APS (atmospheric plasma spray) and HVOF (high velocity oxy-fuel) sprayed NiCrBSiFe coatings have been investigated at 300, 500, and 700°C temperature. The high-temperature dry sliding wear tests were performed at 18 m/min sliding velocity, 10 N normal load, and silicon nitride (1580 HV0.3) as counter material on the pin on disc tribometer, as per ASTM G99 standard. The specific wear rate and the coefficient of friction were compared to assess the behaviour of APS and HVOF coatings. For both coatings, the specific wear rates increased with the temperature. As compared to the APS coating, the HVOF coating had enhanced wear resistance at high-temperature, due to the close packed partially melted particles, low oxide inclusion, low porosity and high hardness. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"16 1","pages":"98 - 109"},"PeriodicalIF":1.3,"publicationDate":"2021-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2021.1898887","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42299779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-04DOI: 10.1080/17515831.2021.1898898
Ogunlakin Nasirudeen Olalekan, M. Abdul Samad, S. Hassan, M. M. Elhady
ABSTRACT Elemental nickel particle was incorporated into magnesium matrix using blend-spark plasma sintering powder metallurgy technique without the use of ball milling and its effect on the hardness and tribological behaviour of magnesium was evaluated. Ball-on-disc wear tests were carried out using a 440C hardened stainless steel ball as a counter-face with a constant linear speed of 0.1 m/s under varying normal loads of 2.5, 5 and 10 N, respectively. The wear track on the disk samples was characterised using a FESEM equipped with energy dispersive spectrometer to investigate the wear mechanisms and features. Results showed that the reinforced magnesium composite showed excellent tribological properties as compared to the monolithic samples in terms of a reduction of up to 27.5% in the coefficient of friction and a reduction of up to 53.7% in weight loss. Microstructural analysis of the wear track established different wear mechanisms of abrasion, adhesive, delamination and oxidative wear. GRAPHICAL ABSTRACT
{"title":"Tribological evaluations of spark plasma sintered Mg–Ni composite","authors":"Ogunlakin Nasirudeen Olalekan, M. Abdul Samad, S. Hassan, M. M. Elhady","doi":"10.1080/17515831.2021.1898898","DOIUrl":"https://doi.org/10.1080/17515831.2021.1898898","url":null,"abstract":"ABSTRACT Elemental nickel particle was incorporated into magnesium matrix using blend-spark plasma sintering powder metallurgy technique without the use of ball milling and its effect on the hardness and tribological behaviour of magnesium was evaluated. Ball-on-disc wear tests were carried out using a 440C hardened stainless steel ball as a counter-face with a constant linear speed of 0.1 m/s under varying normal loads of 2.5, 5 and 10 N, respectively. The wear track on the disk samples was characterised using a FESEM equipped with energy dispersive spectrometer to investigate the wear mechanisms and features. Results showed that the reinforced magnesium composite showed excellent tribological properties as compared to the monolithic samples in terms of a reduction of up to 27.5% in the coefficient of friction and a reduction of up to 53.7% in weight loss. Microstructural analysis of the wear track established different wear mechanisms of abrasion, adhesive, delamination and oxidative wear. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"16 1","pages":"110 - 118"},"PeriodicalIF":1.3,"publicationDate":"2021-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2021.1898898","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48812094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/17515831.2020.1829879
G. Trummer, S. Scheriau, P. Dietmaier, K. Six
ABSTRACT For the development of rail materials with improved properties regarding rolling contact fatigue and wear, it is at first important to know and understand the loading conditions in railway operation. Based on the loading conditions, crack initiation can be predicted. This has been done by a local analysis of the wheel/rail contact conditions with the so-called wedge model. This model takes the plastic shear deformation condition in a layer near the rail surface into account. Results for a specific railway operation scenario and test rig experiments are analysed to demonstrate how such different scenarios can be compared. The work contributes to the understanding of the transferability of test rig results to the behaviour in the field. GRAPHICAL ABSTRACT
{"title":"Reproducing rolling contact fatigue relevant loading conditions of railway operation on a test rig","authors":"G. Trummer, S. Scheriau, P. Dietmaier, K. Six","doi":"10.1080/17515831.2020.1829879","DOIUrl":"https://doi.org/10.1080/17515831.2020.1829879","url":null,"abstract":"ABSTRACT For the development of rail materials with improved properties regarding rolling contact fatigue and wear, it is at first important to know and understand the loading conditions in railway operation. Based on the loading conditions, crack initiation can be predicted. This has been done by a local analysis of the wheel/rail contact conditions with the so-called wedge model. This model takes the plastic shear deformation condition in a layer near the rail surface into account. Results for a specific railway operation scenario and test rig experiments are analysed to demonstrate how such different scenarios can be compared. The work contributes to the understanding of the transferability of test rig results to the behaviour in the field. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"15 1","pages":"127 - 137"},"PeriodicalIF":1.3,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2020.1829879","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48003776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.1080/17515831.2021.1881876
Keyan Enayati, F. Sayyedan
ABSTRACT The aim of this research was to study the tribological behaviour of Ti–48Al–2Nb–2Cr alloy under dry sliding reciprocating conditions. A reciprocating wear machine was employed to evaluate the typical abrasion resistance of the alloy. Infrastructure assessment of worn surfaces was performed by scanning electron microscopy (SEM) analysis equipped with Energy Dispersive X-Ray Spectroscopy (EDS). The average surface roughness of initial specimen was 32 nm. According to the SEM observations of worn surfaces and debris, the dominant wear mechanism under defined tribosystem was identified to be abrasive and delamination wear. The weight loss measurements showed that by increasing the applied load from 10 to 40 N, the weight loss was significantly increased from 5.4 to 18.5 µg after passing 1000 m slip distance. GRAPHICAL ABSTRACT
{"title":"Study of dry sliding wear behaviour of Ti-48Al-2Nb-2Cr alloy","authors":"Keyan Enayati, F. Sayyedan","doi":"10.1080/17515831.2021.1881876","DOIUrl":"https://doi.org/10.1080/17515831.2021.1881876","url":null,"abstract":"ABSTRACT The aim of this research was to study the tribological behaviour of Ti–48Al–2Nb–2Cr alloy under dry sliding reciprocating conditions. A reciprocating wear machine was employed to evaluate the typical abrasion resistance of the alloy. Infrastructure assessment of worn surfaces was performed by scanning electron microscopy (SEM) analysis equipped with Energy Dispersive X-Ray Spectroscopy (EDS). The average surface roughness of initial specimen was 32 nm. According to the SEM observations of worn surfaces and debris, the dominant wear mechanism under defined tribosystem was identified to be abrasive and delamination wear. The weight loss measurements showed that by increasing the applied load from 10 to 40 N, the weight loss was significantly increased from 5.4 to 18.5 µg after passing 1000 m slip distance. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"16 1","pages":"91 - 97"},"PeriodicalIF":1.3,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2021.1881876","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45452045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-27DOI: 10.1080/17515831.2021.1872931
Siddhant Kaushik, Ranvir Singh Panwar
ABSTRACT Coating on a connecting rod of steel (AISI 1078) may be used to reduce the friction and improve the wear resistance to enhance the durability. In this study, the tribological behaviour of uncoated, steam-coated and manganese phosphate-coated steel (AISI 1078) specimens was investigated. Wear tests were carried out by using a pin on disc apparatus operating at a constant velocity of 1.6 m/s under the normal load from 9.8 to 49 N at room temperature. Increment in wear rate was observed by increasing the applied load. However, steam-coated specimen shows better wear resistance than all other specimens at both low and high loads. For a better understanding of the involved wear mechanism, worn surfaces and collected debris were analysed under a scanning electron microscope, which point out that both adhesive and abrasive mechanism were involved during wear testing of specimens. GRAPHICAL ABSTRACT
{"title":"Dry sliding wear behaviour of steel (AISI 1078) after coating with steam treatment and manganese phosphating","authors":"Siddhant Kaushik, Ranvir Singh Panwar","doi":"10.1080/17515831.2021.1872931","DOIUrl":"https://doi.org/10.1080/17515831.2021.1872931","url":null,"abstract":"ABSTRACT Coating on a connecting rod of steel (AISI 1078) may be used to reduce the friction and improve the wear resistance to enhance the durability. In this study, the tribological behaviour of uncoated, steam-coated and manganese phosphate-coated steel (AISI 1078) specimens was investigated. Wear tests were carried out by using a pin on disc apparatus operating at a constant velocity of 1.6 m/s under the normal load from 9.8 to 49 N at room temperature. Increment in wear rate was observed by increasing the applied load. However, steam-coated specimen shows better wear resistance than all other specimens at both low and high loads. For a better understanding of the involved wear mechanism, worn surfaces and collected debris were analysed under a scanning electron microscope, which point out that both adhesive and abrasive mechanism were involved during wear testing of specimens. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"15 1","pages":"292 - 302"},"PeriodicalIF":1.3,"publicationDate":"2021-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2021.1872931","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46960206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.1080/17515831.2020.1871244
A. Jain, Manoj Kumar, G. D. Thakre
ABSTRACT An experimental study on the use of Cu nanofluids as engine oils for reduction of friction in piston ring–liner contact is presented. The Cu nanofluids were prepared using CuS and CuO nanoparticles and blending them in 0.1–6% concentration by weight in the commercial engine oils. The Cu nanoparticles were synthesised and characterised after mixing with the lubricant for their physico-chemical characteristics. The experiments were performed on a reciprocating tribo-tester using actual piston rings and the liners as test specimens. Experiments were performed to investigate the effect of nanoparticle concentration with the change of contact loads and reciprocating frequency on the coefficient of friction. The study reveals that the Cu nanoparticles blended in the engine lubricating oils can significantly reduce friction between piston ring–liner contact, desirable for fuel economy improvement. The Cu nanoparticles are compatible with base lubricants and result in significant friction reduction. The CuS nanoparticles performed significantly better than the CuO nanoparticles. GRAPHICAL ABSTRACT
{"title":"Potential of CuS and CuO nanoparticles for friction reduction in piston ring–liner contact","authors":"A. Jain, Manoj Kumar, G. D. Thakre","doi":"10.1080/17515831.2020.1871244","DOIUrl":"https://doi.org/10.1080/17515831.2020.1871244","url":null,"abstract":"ABSTRACT An experimental study on the use of Cu nanofluids as engine oils for reduction of friction in piston ring–liner contact is presented. The Cu nanofluids were prepared using CuS and CuO nanoparticles and blending them in 0.1–6% concentration by weight in the commercial engine oils. The Cu nanoparticles were synthesised and characterised after mixing with the lubricant for their physico-chemical characteristics. The experiments were performed on a reciprocating tribo-tester using actual piston rings and the liners as test specimens. Experiments were performed to investigate the effect of nanoparticle concentration with the change of contact loads and reciprocating frequency on the coefficient of friction. The study reveals that the Cu nanoparticles blended in the engine lubricating oils can significantly reduce friction between piston ring–liner contact, desirable for fuel economy improvement. The Cu nanoparticles are compatible with base lubricants and result in significant friction reduction. The CuS nanoparticles performed significantly better than the CuO nanoparticles. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"15 1","pages":"278 - 291"},"PeriodicalIF":1.3,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2020.1871244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42034116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-26DOI: 10.1080/17515831.2020.1844518
K. Khlifi, N. Barhoumi, H. Dhiflaoui, A. Ben Cheikh Larbi
ABSTRACT In this study, chromium nitride-based CrSiN coatings were deposited by PVD (physical vapour deposition) magnetron sputtering on XC100 steel substrate. Mechanical properties of CrSiN were investigated using monotonic nanoindentation test. It was found that CrSiN coatings had excellent mechanical properties, hardness of 30.52 ± 1.85 GPa and elastic modulus of 338.32 ± 13.5 GPa. Fatigue behaviour of CrSiN thin film was studied using multi-cycles nanoindentation test. Under cyclic nanoindentation, the unloading–reloading paths produced the hysteresis loops which reflect a fatigue effect. In addition, the increase in the number of indentation cycle induced the degradation of the film mechanical proprieties and the evolution of damage mechanism. The similarity between the indentation fatigue depth propagation and the conventional fatigue crack growth was exploited based on Manson–Coffin law to extract the fatigue properties of CrSiN coating. The obtained fatigue ductility coefficient was and the fatigue ductility exponent was c = −0.96.
{"title":"Fatigue behaviour and mechanical properties of PVD CrSiN coating using cyclic nanoindentation","authors":"K. Khlifi, N. Barhoumi, H. Dhiflaoui, A. Ben Cheikh Larbi","doi":"10.1080/17515831.2020.1844518","DOIUrl":"https://doi.org/10.1080/17515831.2020.1844518","url":null,"abstract":"ABSTRACT In this study, chromium nitride-based CrSiN coatings were deposited by PVD (physical vapour deposition) magnetron sputtering on XC100 steel substrate. Mechanical properties of CrSiN were investigated using monotonic nanoindentation test. It was found that CrSiN coatings had excellent mechanical properties, hardness of 30.52 ± 1.85 GPa and elastic modulus of 338.32 ± 13.5 GPa. Fatigue behaviour of CrSiN thin film was studied using multi-cycles nanoindentation test. Under cyclic nanoindentation, the unloading–reloading paths produced the hysteresis loops which reflect a fatigue effect. In addition, the increase in the number of indentation cycle induced the degradation of the film mechanical proprieties and the evolution of damage mechanism. The similarity between the indentation fatigue depth propagation and the conventional fatigue crack growth was exploited based on Manson–Coffin law to extract the fatigue properties of CrSiN coating. The obtained fatigue ductility coefficient was and the fatigue ductility exponent was c = −0.96.","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"15 1","pages":"252 - 257"},"PeriodicalIF":1.3,"publicationDate":"2020-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2020.1844518","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47066789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-10DOI: 10.1080/17515831.2020.1838100
S. Bhowmick, B. Eskandari, G. Krishnamurthy, A. Alpas
ABSTRACT Tribological behaviour of Ti–6Al–4V alloy sliding against WC-Co was evaluated by employing WS2 nanoparticles blended in a cutting fluid used for machining of this alloy. Pin-on disk tests were carried out under boundary-lubricated condition using a cutting fluid (70% water and 30% oil) blended with WS2 nanoparticles (CF + WS2). When a cutting fluid with ≥ 0.5 wt.% WS2 was used, the COF of the tribosystem was reduced compared to CF + 0%WS2. The lowest COF of 0.05 was obtained when 1.0 wt.% WS2 was used. Low and stable COF values were accompanied by the formation of a tribolayer incorporating WS2 and WO3 on the WC-Co surfaces. During orthogonal machining of Ti–6Al–4V using CF + 1.0%WS2, a tribolayer with the similar composition was formed on the cutting edge of the WC-Co tool and the average cutting force was reduced by 35% compared to cutting with CF + 0%WS2. Machining with CF + 1.0%WS2 produced thinner chips. Other improvements in machining performance attained using CF + 1.0%WS2 included reduction of adhesive wear on the tool and a lower roughness of the machined surface. GRAPHICAL ABSTRACT
{"title":"Effect of WS2 particles in cutting fluid on tribological behaviour of Ti–6Al–4V and on its machining performance","authors":"S. Bhowmick, B. Eskandari, G. Krishnamurthy, A. Alpas","doi":"10.1080/17515831.2020.1838100","DOIUrl":"https://doi.org/10.1080/17515831.2020.1838100","url":null,"abstract":"ABSTRACT Tribological behaviour of Ti–6Al–4V alloy sliding against WC-Co was evaluated by employing WS2 nanoparticles blended in a cutting fluid used for machining of this alloy. Pin-on disk tests were carried out under boundary-lubricated condition using a cutting fluid (70% water and 30% oil) blended with WS2 nanoparticles (CF + WS2). When a cutting fluid with ≥ 0.5 wt.% WS2 was used, the COF of the tribosystem was reduced compared to CF + 0%WS2. The lowest COF of 0.05 was obtained when 1.0 wt.% WS2 was used. Low and stable COF values were accompanied by the formation of a tribolayer incorporating WS2 and WO3 on the WC-Co surfaces. During orthogonal machining of Ti–6Al–4V using CF + 1.0%WS2, a tribolayer with the similar composition was formed on the cutting edge of the WC-Co tool and the average cutting force was reduced by 35% compared to cutting with CF + 0%WS2. Machining with CF + 1.0%WS2 produced thinner chips. Other improvements in machining performance attained using CF + 1.0%WS2 included reduction of adhesive wear on the tool and a lower roughness of the machined surface. GRAPHICAL ABSTRACT","PeriodicalId":23331,"journal":{"name":"Tribology - Materials, Surfaces & Interfaces","volume":"15 1","pages":"229 - 242"},"PeriodicalIF":1.3,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17515831.2020.1838100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42837841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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