摘要
利用相变参数测量、变温金相观察、X-射线衍射等方法研究了热循环对Cu-Zn-Al合金马氏体相变和双向记忆效应的影响。热循环使合金相变点升高,可逆马氏体量减少,记忆性能衰减,滞后环宽度变窄。在组织结构上,伴随着热循环,合金有序度降低,并出现高度稳定的残留马氏体。使晶粒粗化,提高合金Al质量分数,适当提高约束加热训练温度均可改善合金抗热循环性能。
Effect of thermal cycling on the martensite transformation and two way shape memory effect (TWSME)in Cu-Zn-Al alloys in studied by means of transformation parameter measurement ,optical metalloscope observationand X-ray diffraction. As thermal cycling numbers increased, the transformation temperatures increased the re-versible martensite amount dereased, the TWSME declined and the width of transformation gysteresis ring becameare very stable. The properties of anti-thermal cycling of the alloys can be enhanced by enlarging grain size, increas-ing mass fraction of Al and properly raising the confined training temperature.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1997年第4期83-87,共5页
Journal of Mechanical Engineering
基金
国家自然科学基金
安徽省"九五"攻关项目