退火温度和淬火介质对Cu-Zn-Al形状记忆合金热处理过程中形状记忆效应和微观组织的影响

M. Ramadhani, R. Rochiem, R. Rizki, M. Arfani
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引用次数: 0

摘要

形状记忆合金(SMA)是一种经过机械变形后能恢复其原始形状的材料。最常用的SMA材料是镍钛合金。然而,它的成本很高。所以有必要有替代材料,例如Cu-Zn-Al。有关Cu-Zn-Al形状记忆合金的一些研究表明其力学性能较差。因此,需要进一步研究确定铜锌铝形状记忆合金的热处理工艺。在本研究中,对Cu-21Zn-5Al合金进行了退火温度(425℃;550℃;600℃)和冷却介质(盐水、干冰)的热处理。退火工艺影响着测试材料的力学性能和显微组织。冷却介质决定固溶处理过程中的冷却速率。本研究的测试包括硬度测试、金相测试、XRD测试、DSC测试和SME测试。从测试结果来看,所有的测试变量都存在形状记忆效应。以卤水为冷却介质,退火温度为450℃时,回收率最高(38.3%)。此外,在盐水冷却介质中,冷却速度最快。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Effect of Annealing Temperature and Quenching Media Variations On Heat Treatment Process of Cu-Zn-Al Shape Memory Alloys For Shape Memory Effect and Microstructure
Shape Memory Alloys (SMA) is a material that can return to its original shape after undergoing mechanical deformation. The most commonly SMA material used is the Ni-Ti alloy. However, it is high cost. So that it is necessary to have alternative materials, for instance Cu-Zn-Al. Several studies related to Cu-Zn-Al Shape Memory Alloys have poor mechanical properties. So there further research required in order to determine the heat treatment process of Cu-Zn-Al Shape Memory Alloys. In this study Cu-21Zn-5Al alloys were given heat treatment with annealing temperature variations (425;550;600°C) and cooling media (brine, dry ice). Annealing process affects the mechanical properties and microstructure of the test material. Cooling media results the cooling rate during solution treatment. Tests in this study include hardness test, metallographic test, XRD test, DSC test, and SME test. From the test results, it was found that all the test variables have the Shape Memory Effect. The variable that had the greatest recovery (38.3%) was annealing temperature of 450°C with the cooling solution media using brine. In addition, the most rapid cooling occurs in the brine cooling media.
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