Microstructures, transformation temperatures and superelastic properties of the rapidly solidified (TiZrHf)50Ni25Co10Cu15 HESMAs

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-04-07 DOI:10.1016/j.intermet.2024.108274

Izaz Ur Rehman , Yeon-wook Kim , Shuanglei Li , Tae-Hyun Nam

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引用次数: 0

Abstract

In this study, the effects of the rapid solidification process on microstructures, transformation behaviors and superelastic properties of the multi-component (TiZrHf)₅₀Ni₂₅Co₁₀Cu₁₅ (at%) high-entropy shape memory alloy (HESMA) were investigated. The as-spun (TiZrHf)₅₀Ni₂₅Co₁₀Cu₁₅ fibers were prepared by a rapid solidification process. The solution-treated (TiZrHf)₅₀Ni₂₅Co₁₀Cu₁₅ alloy bulk specimen consisted of a (NiCoCu)-rich matrix, (TiZrHf)₂(NiCoCu)-type phase and carbide, while the as-spun fiber specimen consisted of (TiZrHf)-rich matrix and carbide. The (TiZrHf)₂(NiCoCu)-type phase is dissolved in the matrix of as-spun fibers due to the rapid solidification process. The martensitic transformation start temperature of the (TiZrHf)₅₀Ni₂₅Co₁₀Cu₁₅ alloy increased from 53.5 °C to 91.5 °C after the rapid solidification process. Both the (TiZrHf)₅₀Ni₂₅Co₁₀Cu₁₅ alloy bulk and fiber specimens showed clear superelasticity and the total superelastic recovery strain increased from 4.6 % to 5.7% after the rapid solidification process.

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快速凝固的 (TiZrHf)50Ni25Co10Cu15 HESMA 的微观结构、转变温度和超弹性特性

本研究探讨了快速凝固工艺对多组分（TiZrHf）50Ni25Co10Cu15（at%）高熵形状记忆合金（HESMA）的微观结构、转变行为和超弹性性能的影响。通过快速凝固工艺制备了原样纺制的 (TiZrHf)50Ni25Co10Cu15 纤维。固溶处理的 (TiZrHf)50Ni25Co10Cu15 合金块体试样由富含 (NiCoCu) 的基体、(TiZrHf)2(NiCoCu) 型相和碳化物组成，而无纺丝纤维试样由富含 (TiZrHf) 的基体和碳化物组成。由于快速凝固过程，(TiZrHf)2(NiCoCu)型相溶解在无纺纤维的基体中。在快速凝固过程后，(TiZrHf)50Ni25Co10Cu15 合金的马氏体转变起始温度从 53.5 ℃升至 91.5 ℃。在快速凝固过程后，(TiZrHf)50Ni25Co10Cu15 合金块体和纤维试样都显示出明显的超弹性，总超弹性恢复应变从 4.6% 增加到 5.7%。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.

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