Stabilization and two-way shape memory effect in Cu-Al-Ni single crystals

被引：59

作者：

Cingolani, E

Van Humbeeck, J

Ahlers, M

机构：

[1] Ctr Atom Bariloche, Inst Balseiro, Div Met, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Catholic Univ Louvain, Mat & Appl Met Dept, B-3030 Heverlee, Belgium

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1999年 / 30卷 / 03期

关键词：

D O I：

10.1007/s11661-999-0041-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The two-way shape memory effect (TWME) induced by stabilization of the martensite phase during aging has been studied in Cu-13.4 Al-4.0 Ni (mass pet) single crystals. The influence of the degree of long-range order on the transformation has been determined by using different heat treatments. The transformation temperatures are strongly influenced by the degree of order in the austenite: annealing from above or below the second neighbor L2(1) ordering temperature changes the M-s by more than 100 degrees C. It has been established that the diffusion in the austenite as well as in the martensite phase is considerably slower in this alloy than in other Cu-based ones, due to the presence of Ni. The obtained TWME has a similar efficiency as when other more complex thermomechanical trainings are made. In this alloy, the TWME by stabilization is not complete, in contrast to that in Cu-Zn-Al single crystals.

引用

页码：493 / 499

页数：7

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