Sintering, Microstructure, and Mechanical Properties of TiTaNbZrHf High-Entropy Alloys Prepared by Cold Isostatic Pressing and Pressure-Less Sintering of Hydrides

Autor:	Yubing Chen, Peidong Liu, Zhaowang Dong, Hanning Liu, Junjie Wang, Xueyi Guo, Yang Xia, Qinmeng Wang
Rok vydání:	2023
Předmět:	powder metallurgy element diffusion powder size General Materials Science high mechanical properties refractory high-entropy alloys
Zdroj:	Materials Volume 16 Issue 5 Pages: 1759
ISSN:	1996-1944
DOI:	10.3390/ma16051759
Popis:	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%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e17d99d95a44280f0bb93ff526aa61f https://doi.org/10.3390/ma16051759 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.