通过合金化碳原子改善FCC-HCP马氏体相变（CrFeMn）60Co35Ni4.8C0.2高熵合金单晶的形状记忆效应

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-05-30 DOI:10.1016/j.matlet.2025.138851

I.V. Kireeva, Yu. I. Chumlyakov, A.A. Saraeva, D.A. Kuksgauzen

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引用次数: 0

摘要

在[1¯44]−取向（CrFeMn）60Co35Ni4.8C0.2高熵合金晶体中，在“加载-卸载”循环拉伸和随后在自由状态下加热的情况下，FCC-HCP马氏体转变（MT）的形状记忆效应（SME）为17%，接近该取向的理论转变应变值17.5%。在应力作用下的“冷热”循环中，当σex = 150 MPa时，SME最大值为13.8%。σex >应力下FCC相与FCC - hcp MT在冷却过程中的塑性变形竞争150mpa不允许获得大于13.8%的SME。

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Improving shape memory effect of the (CrFeMn)60Co35Ni4.8C0.2 high-entropy alloy single crystals with FCC–HCP martensitic transformation via alloying carbon atoms

For the first time, in the

[\bar{1} 44]

−oriented (CrFeMn)₆₀Co₃₅Ni_4.8C_0.2 high-entropy alloy crystals, under tension in a “load-unloading” cycle and subsequent heating in a free state, a shape memory effect (SME) of 17 % was obtained for the FCC–HCP martensitic transformation (MT), close to theoretical value of the transformation strain of 17.5 % for this orientation. In “cooling-heating” cycle under stress, the maximum SME was 13.8 % at stress of σ_ex = 150 MPa. The competition between the plastic deformation of the FCC phase and FCC–HCP MT during cooling under stress at σ_ex > 150 MPa does not allow obtaining SME greater than 13.8 %.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive