Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides
A TiTaNbZrHf refractory high-entropy alloy (RHEA) was synthesized through a cold isostatic pressing and a pressure-less sintering process in a hydrogen atmosphere using a powder mixture of metal hydride prepared either by mechanical alloying (MA) or by rotating mixing. This study investigates how di...
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2023-02-01
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| author | Yubing Chen Peidong Liu Zhaowang Dong Hanning Liu Junjie Wang Xueyi Guo Yang Xia Qinmeng Wang |
| author_facet | Yubing Chen Peidong Liu Zhaowang Dong Hanning Liu Junjie Wang Xueyi Guo Yang Xia Qinmeng Wang |
| author_sort | Yubing Chen |
| collection | DOAJ |
| description | A TiTaNbZrHf refractory high-entropy alloy (RHEA) was synthesized through a cold isostatic pressing and a pressure-less sintering process in a hydrogen atmosphere using a powder mixture of metal hydride prepared either by mechanical alloying (MA) or by rotating mixing. This study investigates how differences in powder particle sizes impact the RHEA’s microstructure and mechanical properties. HCP (a = b = 3.198 Å, c = 5.061 Å) and BCC2 (a = b = c = 3.40 Å) phases were observed in the microstructure of coarse powder TiTaNbZrHf RHEAs at 1400 °C. In contrast, fine powder RHEAs were found to possess two-phase structures of HCP and BCC1 (a = b = c = 3.36 Å) with a higher hardness of 431 HV, compression strength of 1620 MPa, and a plasticity of >20%. |
| first_indexed | 2024-03-11T07:19:15Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T07:19:15Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-08e489c97a91420a908afa6084972acf2023-11-17T08:02:31ZengMDPI AGMaterials1996-19442023-02-01165175910.3390/ma16051759Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of HydridesYubing Chen0Peidong Liu1Zhaowang Dong2Hanning Liu3Junjie Wang4Xueyi Guo5Yang Xia6Qinmeng Wang7School of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaA TiTaNbZrHf refractory high-entropy alloy (RHEA) was synthesized through a cold isostatic pressing and a pressure-less sintering process in a hydrogen atmosphere using a powder mixture of metal hydride prepared either by mechanical alloying (MA) or by rotating mixing. This study investigates how differences in powder particle sizes impact the RHEA’s microstructure and mechanical properties. HCP (a = b = 3.198 Å, c = 5.061 Å) and BCC2 (a = b = c = 3.40 Å) phases were observed in the microstructure of coarse powder TiTaNbZrHf RHEAs at 1400 °C. In contrast, fine powder RHEAs were found to possess two-phase structures of HCP and BCC1 (a = b = c = 3.36 Å) with a higher hardness of 431 HV, compression strength of 1620 MPa, and a plasticity of >20%.https://www.mdpi.com/1996-1944/16/5/1759powder metallurgyrefractory high-entropy alloyspowder sizeelement diffusionhigh mechanical properties |
| spellingShingle | Yubing Chen Peidong Liu Zhaowang Dong Hanning Liu Junjie Wang Xueyi Guo Yang Xia Qinmeng Wang Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides Materials powder metallurgy refractory high-entropy alloys powder size element diffusion high mechanical properties |
| title | Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides |
| title_full | Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides |
| title_fullStr | Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides |
| title_full_unstemmed | Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides |
| title_short | Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides |
| title_sort | sintering microstructure and mechanical properties of titanbzrhf high entropy alloys prepared by cold isostatic pressing and pressure less sintering of hydrides |
| topic | powder metallurgy refractory high-entropy alloys powder size element diffusion high mechanical properties |
| url | https://www.mdpi.com/1996-1944/16/5/1759 |
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