Pub Date : 2023-08-02DOI: 10.1080/00325899.2023.2239608
Van Dao Nguyen, T. Kim, Yee-Un Lee, Soon-jik Hong
ABSTRACT A significant enhancement in the coercivity and grain refinement was revealed for the spark plasma sintered NdFeB magnets by doping eutectic alloy (Nd0.75Pr0.25)70Cu30 powders. The commercially available NdFeB powders were mixed with (Nd0.75Pr0.25)70Cu30 powders (0, 2 and 5 wt.%) and then consolidated by spark plasma sintering at 700°C under 50 MPa. Microstructure analysis shows that the addition of (Nd0.75Pr0.25)70Cu30 alloy reduces the formation of coarse grain zone and decreases the average Nd2Fe14B grain size by intergranular phase modification. The RE-rich phase containing Nd, Pr at the Nd2Fe14B grain boundary caused the magnetic isolation effect. Hence, the coercivity increased from 18.3 kOe for un-doped NdFeB to 20.3 and 21.6 kOe with doping content of 2 and 5 wt.%, respectively. This study provides an economic way to fabricate sintered NdFeB magnets with enhanced coercivity and homogeneous nanostructure.
{"title":"Grain refinement and coercivity enhancement of sintered Nd–Fe–B alloys by doping eutectic alloy (Nd0.75Pr0.25)70Cu30.","authors":"Van Dao Nguyen, T. Kim, Yee-Un Lee, Soon-jik Hong","doi":"10.1080/00325899.2023.2239608","DOIUrl":"https://doi.org/10.1080/00325899.2023.2239608","url":null,"abstract":"ABSTRACT A significant enhancement in the coercivity and grain refinement was revealed for the spark plasma sintered NdFeB magnets by doping eutectic alloy (Nd0.75Pr0.25)70Cu30 powders. The commercially available NdFeB powders were mixed with (Nd0.75Pr0.25)70Cu30 powders (0, 2 and 5 wt.%) and then consolidated by spark plasma sintering at 700°C under 50 MPa. Microstructure analysis shows that the addition of (Nd0.75Pr0.25)70Cu30 alloy reduces the formation of coarse grain zone and decreases the average Nd2Fe14B grain size by intergranular phase modification. The RE-rich phase containing Nd, Pr at the Nd2Fe14B grain boundary caused the magnetic isolation effect. Hence, the coercivity increased from 18.3 kOe for un-doped NdFeB to 20.3 and 21.6 kOe with doping content of 2 and 5 wt.%, respectively. This study provides an economic way to fabricate sintered NdFeB magnets with enhanced coercivity and homogeneous nanostructure.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47844231","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 : 2023-08-01DOI: 10.1080/00325899.2023.2239599
Myeongjun Ji, Hyun-Jun Shim, J. Kim, Yong-Seong Lee, Joonmmyung Choi, Young‐In Lee
ABSTRACT Owing to its processing freedom, additive manufacturing has emerged as a promising material processing method for Fe–Si alloys. In this process, the melt pool fused by selective laser undergoes rapid cooling, which results in non-equilibrium solidifications. Therefore, it is essential to systematically investigate the relationship between process parameters, microstructure and magnetic properties of the Fe–Si alloys manufactured by the L-PBF process. However, the conventional experimental approaches require time-consuming and costly procedures and a great deal of trial and error. In this regard, an efficient and cost-effective tool is needed to investigate the effect of process parameters on the microstructure and magnetic properties under a wide range of process conditions. In this study, the processing parameter correlations were conducted based on the statistical methods using the design of experiments. Through this method, the effect of process parameters on various properties, including relative density, coercivity and saturation magnetisation, was systematically investigated.
{"title":"Processing parameter correlations in powder bed fusion additive manufacturing for Fe–Si soft magnetic materials through design of experiments","authors":"Myeongjun Ji, Hyun-Jun Shim, J. Kim, Yong-Seong Lee, Joonmmyung Choi, Young‐In Lee","doi":"10.1080/00325899.2023.2239599","DOIUrl":"https://doi.org/10.1080/00325899.2023.2239599","url":null,"abstract":"ABSTRACT Owing to its processing freedom, additive manufacturing has emerged as a promising material processing method for Fe–Si alloys. In this process, the melt pool fused by selective laser undergoes rapid cooling, which results in non-equilibrium solidifications. Therefore, it is essential to systematically investigate the relationship between process parameters, microstructure and magnetic properties of the Fe–Si alloys manufactured by the L-PBF process. However, the conventional experimental approaches require time-consuming and costly procedures and a great deal of trial and error. In this regard, an efficient and cost-effective tool is needed to investigate the effect of process parameters on the microstructure and magnetic properties under a wide range of process conditions. In this study, the processing parameter correlations were conducted based on the statistical methods using the design of experiments. Through this method, the effect of process parameters on various properties, including relative density, coercivity and saturation magnetisation, was systematically investigated.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42970653","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 : 2023-07-31DOI: 10.1080/00325899.2023.2241245
Y. Kim, Hae-Kyoung Park, Young Seong Eom, D. Ahn, K. Kim, Ji-Hun Yu, Yoon Suk Choi, Jeong Min Park
ABSTRACT H13 tool steel was additively manufactured by selective laser melting (SLM). The sample printed at a higher laser scan speed exhibited higher strength and ductility than those of the sample printed at a lower speed. The samples were repeatedly exposed to a massive heat input during the SLM. The in-situ tempering effect was applied to the sample; the phase fraction is changed by varying the heat input by controlling the laser scan speed. The microstructure analysis showed that the sample printed at a higher scan speed had a higher fraction of retained austenite than at a lower speed. The former was affected by deformation-induced martensitic transformation with enhanced strain-hardening ability. This study entailed the control of process parameters to improve the mechanical properties and the productivity of SLM-printed H13 tool steel. It investigated the relationship between the laser scan speed and the phase fraction, whose effect on the mechanical properties was confirmed.
{"title":"High-speed manufacturing-driven strength-ductility improvement of H13 tool steel fabricated by selective laser melting","authors":"Y. Kim, Hae-Kyoung Park, Young Seong Eom, D. Ahn, K. Kim, Ji-Hun Yu, Yoon Suk Choi, Jeong Min Park","doi":"10.1080/00325899.2023.2241245","DOIUrl":"https://doi.org/10.1080/00325899.2023.2241245","url":null,"abstract":"ABSTRACT H13 tool steel was additively manufactured by selective laser melting (SLM). The sample printed at a higher laser scan speed exhibited higher strength and ductility than those of the sample printed at a lower speed. The samples were repeatedly exposed to a massive heat input during the SLM. The in-situ tempering effect was applied to the sample; the phase fraction is changed by varying the heat input by controlling the laser scan speed. The microstructure analysis showed that the sample printed at a higher scan speed had a higher fraction of retained austenite than at a lower speed. The former was affected by deformation-induced martensitic transformation with enhanced strain-hardening ability. This study entailed the control of process parameters to improve the mechanical properties and the productivity of SLM-printed H13 tool steel. It investigated the relationship between the laser scan speed and the phase fraction, whose effect on the mechanical properties was confirmed.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44023020","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 : 2023-07-27DOI: 10.1080/00325899.2023.2239615
Hansung Lee, Minsu Kim, Ashutosh Sharma, B. Ahn
ABSTRACT In this study, dry sliding wear of AlSi0.75TiMnFeCux (x = 0, 0.25, 0.5) high-entropy alloy (HEA) produced through mechanical alloying (MA) and spark plasma sintering (SPS) was studied. The microstructure and phase evolution were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wear behaviour of HEAs was assessed by reciprocating wear monitor under a dry air atmosphere. The findings demonstrated that AlSi0.75TiMnFeCux HEAs were multiphase body-centred cubic (BCC/B2) solid solution structured with complex µ-, L21, and Laves. It was discovered that the microhardness and wear behaviour of AlSi0.75TiMnFeCux were comparable to AlSi0.75TiMnFe HEA after the addition of Cu up to 0.25 molar ratio. The maximum hardness of the AlCu0-0.5FeMnTiSi0.75 HEAs reached around 1021–1035 HV. The tribology results show that an oxidative wear in AlSi0.75TiMnFe while the mixed adhesive-abrasive wear mechanism was prominent in the AlSi0.75TiMnFeCu0.25-0.5 HEAs.
{"title":"Oxidative and abrasive wear of multiphase AlSi0.75TiMnFeCux (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion","authors":"Hansung Lee, Minsu Kim, Ashutosh Sharma, B. Ahn","doi":"10.1080/00325899.2023.2239615","DOIUrl":"https://doi.org/10.1080/00325899.2023.2239615","url":null,"abstract":"ABSTRACT In this study, dry sliding wear of AlSi0.75TiMnFeCux (x = 0, 0.25, 0.5) high-entropy alloy (HEA) produced through mechanical alloying (MA) and spark plasma sintering (SPS) was studied. The microstructure and phase evolution were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wear behaviour of HEAs was assessed by reciprocating wear monitor under a dry air atmosphere. The findings demonstrated that AlSi0.75TiMnFeCux HEAs were multiphase body-centred cubic (BCC/B2) solid solution structured with complex µ-, L21, and Laves. It was discovered that the microhardness and wear behaviour of AlSi0.75TiMnFeCux were comparable to AlSi0.75TiMnFe HEA after the addition of Cu up to 0.25 molar ratio. The maximum hardness of the AlCu0-0.5FeMnTiSi0.75 HEAs reached around 1021–1035 HV. The tribology results show that an oxidative wear in AlSi0.75TiMnFe while the mixed adhesive-abrasive wear mechanism was prominent in the AlSi0.75TiMnFeCu0.25-0.5 HEAs.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44025568","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 : 2023-07-26DOI: 10.1080/00325899.2023.2239597
Min-Soo Park, J. Gwak, Kyeong-mi Jang, G. Ha
ABSTRACT Tungsten contains cemented carbide and is an industrially important material. Tungsten oxide is also used as a hardmetal; thus, there is an increased demand for nanosized and highly purified products. This has spurred considerable research interest toward developing a controlled technique for oxidising cemented carbide scraps to directly recycle them into powders. Cemented carbide is converted into tungsten oxide in an oxidising atmosphere, and is characterised as a porous powder formed by expansion during the oxidation reaction. Uniformly oxidising powdery cemented carbide during oxidation heat treatment is difficult, and tungsten oxide particles grow when oxidised at a high temperature for long durations. To study the uniform oxidation of WC–Co cemented carbide, the oxidation behaviour of powdered WC–Co was analysed by varying the temperature and atmospheric oxygen concentration. The phases of the produced oxide powder were analysed, and the specific surface area was measured to confirm the average particle size.
{"title":"Fabrication of tungsten oxide powder from WC–Co cemented carbide scraps by oxidation behaviour","authors":"Min-Soo Park, J. Gwak, Kyeong-mi Jang, G. Ha","doi":"10.1080/00325899.2023.2239597","DOIUrl":"https://doi.org/10.1080/00325899.2023.2239597","url":null,"abstract":"ABSTRACT Tungsten contains cemented carbide and is an industrially important material. Tungsten oxide is also used as a hardmetal; thus, there is an increased demand for nanosized and highly purified products. This has spurred considerable research interest toward developing a controlled technique for oxidising cemented carbide scraps to directly recycle them into powders. Cemented carbide is converted into tungsten oxide in an oxidising atmosphere, and is characterised as a porous powder formed by expansion during the oxidation reaction. Uniformly oxidising powdery cemented carbide during oxidation heat treatment is difficult, and tungsten oxide particles grow when oxidised at a high temperature for long durations. To study the uniform oxidation of WC–Co cemented carbide, the oxidation behaviour of powdered WC–Co was analysed by varying the temperature and atmospheric oxygen concentration. The phases of the produced oxide powder were analysed, and the specific surface area was measured to confirm the average particle size.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47938875","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 : 2023-07-25DOI: 10.1080/00325899.2023.2239609
Yong-Hoon Cho, So-Yeon Park, G. Ham, C. Kim, Sung-Cheol Park, Kee‐Ahn Lee
ABSTRACT In this study, new metamorphic alloy powder (M+) with an optimised composition of Fe-Cr-B-Mo-Nb appropriate for thermal spray process was developed by adding Mo and Nb, and the novel metamorphic alloy coating was fabricated by atmospheric plasma spray (APS) process. Thereafter, the corrosion resistances of the coatings were investigated and compared with those of commercial Fe-Cr-B based metamorphic alloy (M). The high-temperature oxidation resistance of the developed M+ powder feedstock was 2.18 times better than that of the commercial M. The in-flight oxidation occurring during APS process in M+ alloy decreased by 39.5% compared to that in M alloy. The passivation behaviour of M+ alloy was more stable than that of M alloy in a 3.5 wt% NaCl solution. The effect of adding Nb and Mo on the corrosion resistance of M+ coatings was also discussed in connection with microstructural changes.
{"title":"Improved corrosion properties of novel Fe-Cr-B based metamorphic alloy designed for thermal spray process by adding Nb and Mo","authors":"Yong-Hoon Cho, So-Yeon Park, G. Ham, C. Kim, Sung-Cheol Park, Kee‐Ahn Lee","doi":"10.1080/00325899.2023.2239609","DOIUrl":"https://doi.org/10.1080/00325899.2023.2239609","url":null,"abstract":"ABSTRACT In this study, new metamorphic alloy powder (M+) with an optimised composition of Fe-Cr-B-Mo-Nb appropriate for thermal spray process was developed by adding Mo and Nb, and the novel metamorphic alloy coating was fabricated by atmospheric plasma spray (APS) process. Thereafter, the corrosion resistances of the coatings were investigated and compared with those of commercial Fe-Cr-B based metamorphic alloy (M). The high-temperature oxidation resistance of the developed M+ powder feedstock was 2.18 times better than that of the commercial M. The in-flight oxidation occurring during APS process in M+ alloy decreased by 39.5% compared to that in M alloy. The passivation behaviour of M+ alloy was more stable than that of M alloy in a 3.5 wt% NaCl solution. The effect of adding Nb and Mo on the corrosion resistance of M+ coatings was also discussed in connection with microstructural changes.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49255351","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 : 2023-07-20DOI: 10.1080/00325899.2023.2236907
S. Graham, Y. Azakli, J. Withey, M. Jackson
ABSTRACT A novel, two-step, solid-state method to produce complex geometry titanium parts was investigated by combining Cold Isostatic Pressing (CIP) with Field Assisted Sintering Technology (FAST). Hydride-dehydride powders of commercially pure titanium and Ti-6Al-4V were CIP’ed into shaped compacts using silicone moulds, then further consolidated using FAST, with ZrO2 powder as a secondary pressing media. The final parts retained the complex features from the CIP moulds but were compressed in the pressing axis. Densities >99% were achieved, with optimised FAST processing parameters required for the different alloys. High hardness and fine equiaxed microstructures were observed at the edges of the parts, suggesting oxygen transfer from the ZrO2 pressing media had occurred, with more investigation needed to better understand and prevent this. Despite this, the CIP-FAST process route has been demonstrated to be a fast, low-cost and material-efficient option to produce a wide variety of complex titanium parts. GRAPHICAL ABSTRACT
{"title":"CIP-FAST: assessing the production of complex geometry titanium components from powders by combining Cold Isostatic Pressing (CIP) and Field Assisted Sintering Technology (FAST)","authors":"S. Graham, Y. Azakli, J. Withey, M. Jackson","doi":"10.1080/00325899.2023.2236907","DOIUrl":"https://doi.org/10.1080/00325899.2023.2236907","url":null,"abstract":"ABSTRACT A novel, two-step, solid-state method to produce complex geometry titanium parts was investigated by combining Cold Isostatic Pressing (CIP) with Field Assisted Sintering Technology (FAST). Hydride-dehydride powders of commercially pure titanium and Ti-6Al-4V were CIP’ed into shaped compacts using silicone moulds, then further consolidated using FAST, with ZrO2 powder as a secondary pressing media. The final parts retained the complex features from the CIP moulds but were compressed in the pressing axis. Densities >99% were achieved, with optimised FAST processing parameters required for the different alloys. High hardness and fine equiaxed microstructures were observed at the edges of the parts, suggesting oxygen transfer from the ZrO2 pressing media had occurred, with more investigation needed to better understand and prevent this. Despite this, the CIP-FAST process route has been demonstrated to be a fast, low-cost and material-efficient option to produce a wide variety of complex titanium parts. GRAPHICAL ABSTRACT","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49085866","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 : 2023-07-17DOI: 10.1080/00325899.2023.2236381
Kunpot Banjongaxsorn, A. Khantachawana, Chihiro Watanabe, Kasama Srirussamee, K. Kondoh
{"title":"Microstructure and mechanical properties of Ti-Zr alloys fabricated by two-step spark plasma sintering from TiH2 and ZrH2 powders","authors":"Kunpot Banjongaxsorn, A. Khantachawana, Chihiro Watanabe, Kasama Srirussamee, K. Kondoh","doi":"10.1080/00325899.2023.2236381","DOIUrl":"https://doi.org/10.1080/00325899.2023.2236381","url":null,"abstract":"","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43757538","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 : 2023-07-14DOI: 10.1080/00325899.2023.2235143
J. Parida, S. Mishra, B. C. Marupalli, A. Behera
ABSTRACT In this research work, the effect of Fe additions on the phase evolution, microstructure, chemical composition, transformation behaviour and properties of Ni(50−X)Ti50FeX shape memory alloys has been investigated. The elemental Ti, Ni and Fe mixed powders are compacted at 600 MPa, followed by sintering at 1100°C for 4hr in an Ar atmosphere. Phase analysis and microstructural studies confirmed the presence of the NiTi phase besides other Ni-rich and Ti-rich phases. The 8at.-% Fe sample shows higher relative density, lower porosity, higher hardness, higher elastic modulus and higher wear resistance owing to the presence of a higher amount of secondary intermetallic phases compared to other composition samples. Interestingly, the 4at.-% Fe sample has a higher percentage of NiTi (B19’) phase and shows a better shape memory effect and elastic recovery than other composition samples. FESEM morphology of worn surface explained various wear mechanisms with respect to shape memory behaviour.
{"title":"Fabrication of nickel-titanium-iron shape memory alloys by powder metallurgy route and analyses of their physical and mechanical behaviour","authors":"J. Parida, S. Mishra, B. C. Marupalli, A. Behera","doi":"10.1080/00325899.2023.2235143","DOIUrl":"https://doi.org/10.1080/00325899.2023.2235143","url":null,"abstract":"ABSTRACT In this research work, the effect of Fe additions on the phase evolution, microstructure, chemical composition, transformation behaviour and properties of Ni(50−X)Ti50FeX shape memory alloys has been investigated. The elemental Ti, Ni and Fe mixed powders are compacted at 600 MPa, followed by sintering at 1100°C for 4hr in an Ar atmosphere. Phase analysis and microstructural studies confirmed the presence of the NiTi phase besides other Ni-rich and Ti-rich phases. The 8at.-% Fe sample shows higher relative density, lower porosity, higher hardness, higher elastic modulus and higher wear resistance owing to the presence of a higher amount of secondary intermetallic phases compared to other composition samples. Interestingly, the 4at.-% Fe sample has a higher percentage of NiTi (B19’) phase and shows a better shape memory effect and elastic recovery than other composition samples. FESEM morphology of worn surface explained various wear mechanisms with respect to shape memory behaviour.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43963984","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 : 2023-07-12DOI: 10.1080/00325899.2023.2233823
T. Kang, Amol B. Kale, Han-Soo Kim, Kee‐Ahn Lee
ABSTRACT Microstructural characteristics and wear properties of Fe-16Mn-10Al-5Ni-0.86C lightweight steel (LWS) manufactured by laser powder bed fusion (LPBF) process were investigated and compared with conventional LWS. Both LWS alloys constituted an austenite matrix and B2-IMC. The LPBF LWS sample showed polygonal-typed B2-IMC, whereas conventional LWS had rod-typed B2-IMC. The ball-on-disk method was used to perform a wear test at 25°C under three different load conditions of 20N, 3N and 40N. The wear results indicated that the LPBF LWS sample exhibited a similar amount of wear loss under the 20N and 30N load conditions, but it showed better wear resistance under the 40N compared to conventional LWS. After the wear test, the abrasive wear behaviour was confirmed as the main wear mechanism in both LWSs. The formation of oxide layers and debris was analysed through observation of the cross-sectional area of the worn surface.
{"title":"Wear properties of Fe-16Mn-10Al-5Ni-0.86C lightweight steel manufactured by laser powder bed fusion","authors":"T. Kang, Amol B. Kale, Han-Soo Kim, Kee‐Ahn Lee","doi":"10.1080/00325899.2023.2233823","DOIUrl":"https://doi.org/10.1080/00325899.2023.2233823","url":null,"abstract":"ABSTRACT Microstructural characteristics and wear properties of Fe-16Mn-10Al-5Ni-0.86C lightweight steel (LWS) manufactured by laser powder bed fusion (LPBF) process were investigated and compared with conventional LWS. Both LWS alloys constituted an austenite matrix and B2-IMC. The LPBF LWS sample showed polygonal-typed B2-IMC, whereas conventional LWS had rod-typed B2-IMC. The ball-on-disk method was used to perform a wear test at 25°C under three different load conditions of 20N, 3N and 40N. The wear results indicated that the LPBF LWS sample exhibited a similar amount of wear loss under the 20N and 30N load conditions, but it showed better wear resistance under the 40N compared to conventional LWS. After the wear test, the abrasive wear behaviour was confirmed as the main wear mechanism in both LWSs. The formation of oxide layers and debris was analysed through observation of the cross-sectional area of the worn surface.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47526933","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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