Enhanced superelasticity of Cu-Al-Ni shape memory alloys with strong orientation prepared by horizontal continuous casting  

作　　者：Mengwei WU Yu XIAO Zhuofan HU Ruiping LIU Chunmei MA 

机构地区：[1]Department of Materials Science and Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China [2]Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Frontiers of Materials Science》2022年第4期105-112,共8页材料学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51974028);the Fundamental Research Funds for the Central Universities(Grant No.2021JCCXJD01);the Key R&D and Transformation Projects in Qinghai Province(Grant No.2021-HZ-808);Hebei Province(Grant No.21314401D).

摘　　要：The preparation of large-scale Cu-Al-Ni shape memory alloys with excellent microstructure and texture is a significant challenge in this field.In this study,large-scale Cu-Al-Ni shape memory alloy(SMA)slabs with good surface quality and strong orientation were prepared by the horizontal continuous casting(HCC).The microstructure and mechanical properties were compared with the ordinary casting(OC)Cu-Al-Ni alloy.The results showed that the microstructure of OC Cu-Al-Ni alloy was equiaxed grains with randomly orientation,which had no obvious superelasticity.The alloys producedby Hcchad herringbone grains withstrong orientation near(100)and the cumulative tensile superelasticity of 4.58%.The superelasticity of the alloy produced by HCC has been improved by 4-5 times.This work has preliminarily realized the production of large-scale Cu-Al-Ni SMA slab with good superelasticity,which lays a foundation forexpanding the industrial production and application of Cu-based SMAs.

关 键 词：shape memory alloy CU-AL-NI ORIENTATION SUPERELASTICITY 

分 类 号：TG139.6[一般工业技术—材料科学与工程]