High-temperature martensitic transformation of CuNiHfTiZr high- entropy alloys.

ABSTRACT: One of the major challenges of near-equiatomic NiTi shape memory alloys is their limitation for high-temperature applications. To overcome this barrier, researchers have tried to enhance the transformation temperatures by addition of alloying elements or even by introducing the concept of high-entropy alloys (HEAs). In this study, the CuNiHfTiZr HEAs were developed for high-temperature shape memory effect. Based on their solubility and electron configurations, the alloying elements are divided into two groups, (CuNi)₅₀ and (HfTiZr)₅₀. The content of Cu in (CuNi)₅₀ is modulated to investigate the influences of Cu on martensitic transformation of the HEAs by studying structural evolution and transformation behavior. The results of x-ray diffraction and therma

SUBMITTER: Chang SH 

PROVIDER: S-EPMC6925220 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature