Lattice structure and mechanical behavior of DyGdYHoTbhigh-entropy alloy
首发时间:2017-05-23
Abstract:A new kind of equiatomicDyGdYHoTb solid solution high entropy alloy (HEA) was synthesized by arc-melting. The hexagonal close packed (HCP) lattice structure of this HEA was revealed by X-ray diffraction (XRD) pattern. A series of disks, 2.0 mm in thickness and 10.0 mm in diameter, were applied to semi-constraint high pressure torsion (HPT) under a pressure of 5.0GPa with 0.0, 0.5, 2.5 and 5.0 turns, respectively. Vickers hardness (HV) of the twisteddisks, showing great relevance to the number of turns, complies well with the strain-hardening theory. Compression behavior of three samples, one as-cast, one just pressed under 5.0 GPa and one annealed at 1273K under 5.0GPa were researched.After different heat treatments, strengths of all these samples werequite limited and not very different from each other.
keywords: High-entropy alloy Hexagonal close packed High pressure torsion
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对DyGdYHoTb高熵合金的晶体结构与力学行为的研究
摘要:通过电弧熔炼制备了一种新型等原子比高熵合金DyGdYHoTb。通过XRD表征该合金的晶体结构为密排六方(HCP)。将一系列厚度为2.0mm直径为10.0mm的圆盘试样施加5.0GPa的压力下,分别进行高压扭转(HPT)0.0,0.5,2.5和5.0圈。扭转后的维氏硬度显示硬度与扭转圈数有很大的关系,这很符合加工硬化理论。铸态、5.0GPa扭转和5.0GPa扭转后1273K退火后的试样进行了压缩行为研究。经过不同的热处理后,试样的强度相当有限,并且个样品之间相差不大。
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No.4734058120166814****
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