Microstructure, martensitic transformation and shape memory effect of novel Cu-Al-Ga based shape memory single crystals

被引：7

作者：

Chen, Shuaishuai ^{[1
,2
,3
]}

Chen, XiaoQiang ^{[1
,2
,3
]}

Guo, LiPeng ^{[1
,2
,3
]}

Zheng, ShiWei ^{[1
,2
,3
]}

Chen, Feng ^{[1
,2
,3
]}

Wang, Cuiping ^{[1
,3
]}

Yang, Shuiyuan ^{[1
,2
,3
]}

机构：

[1] Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Shenzhen Res Inst, Shenzhen 518055, Peoples R China

[3] Xiamen Univ, Fujian Key Lab Surface & Interface Engn High Perfo, Xiamen Key Lab High Performance Met & Mat, Xiamen 361005, Peoples R China

来源：

VACUUM | 2023年 / 210卷

基金：

中国国家自然科学基金;

关键词：

Cu-Al-Ga based Shape memory alloys; Single crystal; Martensitic transformation; Shape memory effect; ZN-AL; BEHAVIOR; SUPERELASTICITY; RESISTANCE; MORPHOLOGY; ALLOY; PHASE;

D O I：

10.1016/j.vacuum.2023.111824

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the shape memory effect of novel iron-alloyed Cu-Al-Ga shape memory single crystals were re-ported for the first time. The microstructure, crystal structure, martensitic transformation and shape memory effect of Cu-10Al-6Ga (master alloy), Cu-10Al-6Ga-3Fe, Cu-12Al-4Ga-3Fe and Cu-14Al-4Ga-3Fe (wt.%) were investigated. All studied alloys consist of dominant martensite and fine bcc nanoparticles with richer Fe content and poorer Cu content except master alloy. The martensitic transformation start temperatures are 241.3 degrees C, 251.3 degrees C and 71.9 degrees C for Cu-10Al-6Ga-3Fe, Cu-12Al-4Ga-3Fe and for Cu-14Al-4Ga-3Fe alloys, respectively. For master alloy, the martensitic transformation disappears resulted from the precipitation of a large amount of alpha-Cu during heating. In addition, the shape memory effects clearly increase as a result of increase of the pre-strains. The Cu-14Al-4Ga-3Fe single crystal obtains a maximum shape memory effect of 6.8% with 100% strain recovery when 10% pre-strain is applied.

引用

页数：8

共 32 条

[1] A look into Cu-based shape memory alloys: Present scenario and future prospects [J].