超声纳米晶表面改性(FeCoNiCr)92Ti3.5Al4.5 HEA的变形机理研究

IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Yun Zou, Rongxin Liao, Rongtao Shen, Zhihua Liu, Yang Li
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引用次数: 0

摘要

高熵合金(HEAs)以其独特的特性而闻名,但大多数材料的失效都是由材料的表面特性决定的。本研究提出了一种有效的超声纳米晶表面改性(UNSM)处理方法,以进一步提高(FeCoNiCr)92Ti3.5Al4.5 HEA的表面力学性能。更重要的是,揭示了UNSM处理HEA的变形机理。我们的研究表明,在低应变下,位错滑移主导着粗晶的变形,{100}<001>;作为主要滑动系统的。相反,在高应变下,孪晶是细晶粒的主要变形机制。值得注意的是,在变形的初始阶段,粗晶粒的细化尤为明显。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating deformation mechanisms of (FeCoNiCr)92Ti3.5Al4.5 HEA treated by ultrasonic nanocrystal surface modification
High-entropy alloys (HEAs) are known for their unique characteristics, but most material failures are subjected to the material surface, which is determined by the surface properties of the material. This study proposes an effective ultrasonic nanocrystal surface modification (UNSM) treatment to further enhance the surface mechanical properties of (FeCoNiCr)92Ti3.5Al4.5 HEA. More importantly, the deformation mechanisms of HEA treated by UNSM were revealed. Our research revealed that dislocation slip predominantly governs the deformation of coarse grains under low strain, with {100}< 001 > acting as the primary slip system. Conversely, twinning emerges as the primary deformation mechanism for fine grains under high strain. Notably, the refinement of coarse grains is particularly pronounced during the initial stages of deformation.
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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