三次trip诱导的高熵合金超高室温延展性策略

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-04-03 DOI:10.1016/j.scriptamat.2025.116683

Jinke Han , Ge Zhou , Haoyu Zhang , Siqian Zhang , Mingjiu Zhao , Chenyang Lu , Zhengxiong Su , Yuhan Peng , Xin Che , Lijia Chen , Peter K. Liaw

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引用次数: 0

摘要

具有细晶结构的亚稳态双相HEAs在室温拉伸测试中表现出B-TRIP效应，其最大断裂伸长率为77%。本文采用SFE计算、细晶结构制备和相比控制三种策略，设计制备了一种新的Fe49Mn33.2Cr9.6Co8.2 HEA，该HEA在热力学上可以实现FCC与HCP相之间的多种互转化条件，以充分利用SFE相组成和稳定晶粒尺寸对室温延性的协同作用。结果表明：在B-TRIP作用下，合金未发生断裂，在70%变形时再次发生FCC相到HCP相的转变，直至断裂。断裂时，HCP相含量保持在40%左右，合金表现出特殊的五阶段应变硬化行为。在三重trip效应下，迄今为止报道的室温断裂后伸长率最高，达到91%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A strategy for Triple-TRIP-induced ultra-high room-temperature ductility of high-entropy alloys

查看原文本刊更多论文

A strategy for Triple-TRIP-induced ultra-high room-temperature ductility of high-entropy alloys

Metastable dual-phase HEAs with fine-grain structure exhibit the B-TRIP effect during room-temperature tensile testing, with a maximum elongation at a break of 77 %. This paper adopts three strategies: SFE calculation, fine grain structure preparation, and phase ratio control, to design and prepare a new Fe₄₉Mn_33.2Cr_9.6Co_8.2 HEA that can achieve multiple interconversion conditions between FCC and HCP phases thermodynamically in order to fully leverage the synergistic effect of SFE phase composition and stability grain size on room-temperature ductility. The results showed that the alloy did not fracture after undergoing the B-TRIP effect but underwent FCC phase to HCP phase transformation again at a deformation of 70 % until the fracture process. At the time of fracture, the HCP phase content remained at around 40 %, and the alloy exhibited a particular five-stage strain-hardening behavior. Under the Triple-TRIP effect, the highest post-fracture elongation at room temperature reported so far was obtained, which was 91 %.

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来源期刊

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.