Low-cost (ZrCu)50-xTax high temperature shape memory alloys showing excellent shape memory effect
Low-cost （ZrCu）50-xTax high temperature shape memory alloys showing excellent shape memory effect作者机构：College of Materials Science and Chemical Engineering Harbin Engineering University College of Nuclear Equipment and Nuclear Engineering Yan Tai University School of Materials Science and Engineering Harbin Institute of Technology
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2022年第32卷第3期
页 面：369-374页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：Project (51701045) supported by the National Natural Science Foundation of China project (3072021CFJ1003) supported by Harbin Engineering University basic scientific research business expenses of central universities project (61429090307) supported by Key Laboratory of Precision Thermal Processing of Metals Fund project of Harbin Institute of Technology project supported by "Ten Thousand Million" Engineering Science and Technology Major Special Project of Heilongjiang Province
主 题：ZrCu-Based alloys High-temperature shape memory alloys Microstructure Shape memory effect Martensitic transformation
摘 要：ZrCu-based alloys, as one of the most potential high-temperature shape memory alloys, show quite high martensitic transformation temperature, relatively low price for the raw materials, and good casting fluidity. In this work, the martensitic transformation(MT) and shape memory effect of (ZrCu)50-xTaxhigh-temperature shape memory alloys were systematically investigated. Both X ray diffraction and SEM backscattered electron image demonstrated the coexistence of the main phase monoclinic martensite phase and the second phase Ta2Cu. SEM results also revealed that increasing Ta content resulted in a larger volume fraction of Ta2Cu phase. Differential scanning calorimetry results showed that the MT temperatures remarkably increased with Ta addition. The ductility of the (ZrCu)50-xTaxalloys was reduced to some degree with increasing Ta content. The shape memory effect was improved significantly, in which(ZrCu)98Ta2alloy showed the 6.19% maximum recovery strain during 8% pre-strain under compression at 25℃.
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