Influence of Heat Treatment on Microstructures and Shape Memory Effect of Cu-28Zn-2.5Al wt. % Produced by Gravity Casting

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-06-30 DOI:10.15282/ijame.20.2.2023.07.0805

A. Setyani, I. A. Setiawan, P. R. Pamungkas, N. Sofyan, B. T. Sofyan

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引用次数: 0

Abstract

Cu-Zn-Al is one of the prospective shape memory alloys due to its promisingly good shape memory effect (SME), obtainable at a lower price through an easier fabrication process. Several hindrances that lower the SME of the Cu-Zn-Al can be improved by applying modified quenching methods and media. This study comprehensively studied the effects of quenching methods and media on Cu-28Zn- 2.5Al wt.% alloy. The alloy was fabricated by gravity casting and homogenized at 850 °C for 2 h. It was then betatized at 850 °C for 30 minutes and subsequently quenched using two different methods: direct quenching (DQ) and up quenching (UQ) with two different cooling media: water + dry ice (WD) and saltwater + dry ice (SD). Several characterizations to determine the material properties, such as morphology, structure, and hardness, were held, and additional semi-empirical bending tests were also conducted to determine the SME performance. The results showed that all quenched samples consisted of βʹ martensite [M18R] and retained α [A1] after quenching, regardless of the quenching method and cooling media. Upon analysis, the quenching with UQ method in SD media was found to be the most effective quenching process, as the method yields in an alloy with the highest SME performance. The pathway for achieving a high SME performance of Cu-Zn-Al alloy was thoroughly discussed in the article.

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热处理对重力铸造Cu-28Zn-2.5Al合金组织及形状记忆效应的影响

Cu-Zn-Al合金具有良好的形状记忆效果，且制备工艺简单、价格低廉，是一种有发展前景的形状记忆合金。通过改进淬火方法和淬火介质，可以改善降低Cu-Zn-Al合金SME的几种障碍。本研究全面研究了淬火方式和淬火介质对Cu-28Zn- 2.5Al wt.%合金的影响。采用重力铸造法制备合金，850℃下均质2小时，850℃下保温30分钟，用水+干冰(WD)和盐水+干冰(SD)两种不同的冷却介质进行直接淬火(DQ)和上淬火(UQ)。进行了若干表征以确定材料性能，如形态、结构和硬度，并进行了额外的半经验弯曲测试以确定SME性能。结果表明，无论淬火方式和冷却介质如何，淬火后的样品均由β′马氏体[M18R]组成，并保留α [A1]。通过分析，发现在SD介质中使用UQ法淬火是最有效的淬火工艺，因为该方法产生的合金具有最高的SME性能。本文对Cu-Zn-Al合金实现高SME性能的途径进行了深入探讨。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.