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首页> 外文期刊>Journal of Materials Engineering and Performance >Accumulative Roll Bonding and Post-Deformation Annealing of Cu-Al-Mn Shape Memory Alloy
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Accumulative Roll Bonding and Post-Deformation Annealing of Cu-Al-Mn Shape Memory Alloy

机译：Cu-Al-Mn形状记忆合金的累积辊压结合和变形后退火

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摘要

Accumulative roll bonding is a severe plastic deformation process used for Cu-Al-Mn shape memory alloy. The main purpose of this study is to investigate the possibility of grain refinement of Cu-9.5Al-8.2Mn (in wt.%) shape memory alloy using accumulative roll bonding and post-deformation annealing. The alloy was successfully subjected to 5 passes of accumulative roll bonding at 600 A degrees C. The microstructure, properties as well as post-deformation annealing of this alloy were investigated by optical microscopy, scanning electron microscopy, x-ray diffraction, differential scanning calorimeter, and bend and tensile testing. The results showed that after 5 passes of ARB at 600 A degrees C, specimens possessed alpha A + beta microstructure with the refined grains, but martensite phases and consequently shape memory effect completely disappeared. Post-deformation annealing was carried out at 700 A degrees C, and the martensite phase with the smallest grain size (less than 40 mu m) was obtained after 150 s of annealing at 700 A degrees C. It was found that after 5 passes of ARB and post-deformation annealing, the stability of SME during thermal cycling improved. Also, tensile properties of alloys significantly improved after post-deformation annealing.
机译：累积辊压粘合是用于Cu-Al-Mn形状记忆合金的一种严重的塑性变形过程。这项研究的主要目的是研究使用累积辊轧结合和变形后退火对Cu-9.5Al-8.2Mn（重量％）形状记忆合金进行晶粒细化的可能性。对该合金在600 A的温度下成功进行了5次累积的辊压粘合。通过光学显微镜，扫描电子显微镜，X射线衍射，差示扫描量热仪研究了该合金的组织，性能以及变形后退火。 ，以及弯曲和拉伸测试。结果表明，在600 A的温度下经过5次ARB经过后，试样具有具有细化晶粒的αA +β微观结构，但马氏体相以及因此的形状记忆效应完全消失了。在700 A的温度下进行变形后退火，在700 A的温度下退火150 s后，获得晶粒尺寸最小（小于40μm）的马氏体相。 ARB和变形后退火，改善了SME在热循环过程中的稳定性。而且，变形后的退火后合金的拉伸性能显着提高。

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