Excellent strength-ductility combination in the absence of twinning in a novel single-phase VMnFeCoNi high-entropy alloy

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub Date : 2024-11-05 DOI:10.1016/j.scriptamat.2024.116430
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Abstract

In the field of single-phase high-entropy alloys (HEAs), most research has been limited to a few systems. For example, among the face-centered cubic (FCC) alloys, the Cantor alloy (equiatomic CrMnFeCoNi) and its derivatives have received the greatest attention. Subsequent attempts to produce quinary single-phase FCC HEAs have been largely unsuccessful, except for a few examples such as NiCuPdPtAu (the Freundenberger alloy). In the present work, we show for the first time that the equiatomic VMnFeCoNi alloy, which is not a subset of any previously reported system, has been successfully synthesized as single-phase FCC, with homogeneous composition and random texture. Its room-temperature tensile properties were investigated and compared with those of CrMnFeCoNi. VMnFeCoNi exhibits superior tensile properties to CrMnFeCoNi in terms of yield strength, work hardening behavior, ultimate tensile strength, and ductility. Surprisingly, its remarkable strength-ductility combination was achieved despite the absence of deformation twinning, as confirmed by transmission electron microscopy.

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新型单相 VMnFeCoNi 高熵合金在无孪晶的情况下具有优异的强度-电导率组合性能
在单相高熵合金(HEAs)领域,大多数研究仅限于少数几个体系。例如,在面心立方(FCC)合金中,Cantor 合金(等价铬锰铁钴镍)及其衍生物最受关注。除了 NiCuPdPtAu(Freundenberger 合金)等少数几个例子之外,后来生产二元单相 FCC HEA 的尝试基本上都不成功。在本研究中,我们首次展示了等原子 VMnFeCoNi 合金,它不是以前报道过的任何体系的子集,而是以单相催化裂化的形式成功合成的,具有均匀的成分和无规的质地。对其室温拉伸性能进行了研究,并与铬锰铁钴镍进行了比较。VMnFeCoNi 在屈服强度、加工硬化行为、极限拉伸强度和延展性方面的拉伸性能均优于 CrMnFeCoNi。令人惊讶的是,尽管没有变形孪晶,但透射电子显微镜证实了其卓越的强度-韧性组合。
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来源期刊
Scripta Materialia
Scripta Materialia 工程技术-材料科学:综合
CiteScore
11.40
自引率
5.00%
发文量
581
审稿时长
34 days
期刊介绍: Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.
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