铸态CoCrFeNi和CoCrFeMnNi高熵合金的拉伸响应

IF 2.4 4区材料科学 Q2 CRYSTALLOGRAPHY

Crystals Pub Date : 2022-01-21 DOI:10.3390/cryst12020157

T. Lam, Mao-Yuan Luo, T. Kawasaki, S. Harjo, J. Jain, S. Lee, An-Chou Yeh, E. Huang

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引用次数: 4

摘要

本研究系统地研究了等原子CoCrFeNi和CoCrFeMnNi高熵合金(HEAs)。这两种HEA系统都是单相、面心立方(FCC)结构。具体来说，我们研究了铸态四元CoCrFeNi和五元CoCrFeMnNi HEAs在室温下的拉伸响应。与CoCrFeNi HEA相比，CoCrFeMnNi HEA的延伸率降低了14%，但屈服强度和极限抗拉强度分别提高了17%和6%。通过原位中子衍射测量获得了结构缺陷在单轴应变过程中的直接实时演化。利用卷积多整体剖面(CMWP)软件对铸态CoCrFeNi和CoCrFeMnNi HEAs进行峰值剖面拟合，揭示了铸态CoCrFeNi和CoCrFeMnNi HEAs各变形阶段塑性变形机制的主导组织。报告了可能的机制。

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Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys

In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.

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来源期刊

Crystals CRYSTALLOGRAPHYMATERIALS SCIENCE, MULTIDIS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

4.20

自引率

11.10%

发文量

1527

审稿时长

16.12 days

期刊介绍： Crystals (ISSN 2073-4352) is an open access journal that covers all aspects of crystalline material research. Crystals can act as a reference, and as a publication resource, to the community. It publishes reviews, regular research articles, and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Full experimental details must be provided to enable the results to be reproduced. Crystals provides a forum for the advancement of our understanding of the nucleation, growth, processing, and characterization of crystalline materials. Their mechanical, chemical, electronic, magnetic, and optical properties, and their diverse applications, are all considered to be of importance.