Influence of cooling in liquid nitrogen on shape memory effect of CuZnAlMnNi alloy

Shape memory effect (SME) of a CuZnAlMnNi alloy after cooling in liquid nitrogen was investigated. It was found that the SME decreases when the quenched alloy is subjected to further cooling in liquid nitrogen. The original substructure of stacking faults becomes confused, and the order degree of th...

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Bibliographic Details
Published inMaterials research bulletin Vol. 36; no. 13; pp. 2415 - 2419
Main Authors Bai, Yu-Jun, Xu, Xian-Gang, Hao, Xiao-Peng, Cui, De-Liang, Geng, Gui-Li
Format Journal Article
LanguageEnglish
Published London Elsevier Ltd 01.11.2001
Amsterdam Elsevier Science
Subjects
A. Alloys
B. Electron microscopy
Cross-disciplinary physics: materials science; rheology
D. Microstructure
Exact sciences and technology
Martensitic transformations
Materials science
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
D. Microstructure
B. Electron microscopy
A. Alloys
Shape memory effects
Stacking faults
Transmission electron microscopy
Cooling
Reverse martensitic transformations
Order degree
Phase boundaries
Martensitic transformations
Copper base alloys
Substructure
Experimental study
Quenching
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Summary:Shape memory effect (SME) of a CuZnAlMnNi alloy after cooling in liquid nitrogen was investigated. It was found that the SME decreases when the quenched alloy is subjected to further cooling in liquid nitrogen. The original substructure of stacking faults becomes confused, and the order degree of the alloy reduces after further cooling. The confused stacking faults are easy to evolve into dislocations during training, which inhibits the motion of phase boundaries during the forward and reverse martensitic transformations and finally results in the decrement of SME.
ISSN:0025-5408
1873-4227
DOI:10.1016/S0025-5408(01)00692-4