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 produced by HCC had herringbone grains with strong orientation near<1 0 0>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 for expanding the industrial production and application of Cu-based SMAs.

Mengwei WU;Yu XIAO;Zhuofan HU;Ruiping LIU;Chunmei MA

Department of Materials Science and Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China

材料学前沿

[1]Mengwei WU;Yu XIAO;Zhuofan HU;Ruiping LIU;Chunmei MA-.Enhanced superelasticity of Cu-Al-Ni shape memory alloys with strong orientation prepared by horizontal continuous casting)[J].材料学前沿,2022(04):105-112

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