EFFECT OF SINTERING TEMPERATURE ON THE MICROSTRUCTURE AND PROPERTIES OF POWDER METALLURGY Hf0.5Nb0.5Ta0.5Ti1.5Zr REFRACTORY HIGH-ENTROPY ALLOY

被引:0
作者
Gouvea, Larissa A. [1 ]
Kovacova, Zuzana [2 ]
Jan, Vit [1 ]
Spotz, Zdenek [1 ]
Kitzmantel, Michael [2 ]
Neubauer, Erich [2 ]
Dlouhy, Ivo [1 ]
机构
[1] Brno Univ Technol, Fac Mech Engn, NETME Ctr, Inst Mat Sci & Engn, Brno, Czech Republic
[2] Forsch & Technol Zentrum, RHP Technol GmbH, Seibersdorf, Austria
来源
28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019) | 2019年
关键词
Compositionally complex alloys; refractory alloy; hot pressing; mechanical alloying; DESIGN;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The present work is focused on the synthesis and mechanical properties evaluation of non-equiatomic Hf0.5Nb0.5Ta0.5Ti1.5Zr Refractory High-Entropy Alloy (RHEA). For the alloy production, a combination of mechanical alloying (MA) process in a planetary ball mill and hot pressing (HP) for powder densification was utilized. The effect of different sintering temperatures was explored in a temperature range of 1200 degrees C up to 1600 degrees C. The bulk material was then subject to investigation in terms of its microstructural features, elemental and phase composition and basic mechanical properties by scanning electron microscopy (SEM), X-ray diffraction (XRD), as well as hardness testing, density determination by Archimedes' principle. The results show that very hard fine grained bulk materials were achieved in all microstructures, with an average hardness of (784 +/- 5) HV0.2, (793 +/- 3) HV0.2 and (814 +/- 5) HV0.2 for the sintering temperatures of 1200 degrees C, 1300 degrees C and 1600 degrees C respectively. The slightly minimum increase in hardness might be attributed to the partial dissolution of a second-phase triggered by the increase in temperature.
引用
收藏
页码:1486 / 1491
页数:6
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