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Effect of Betatizing Temperature on Transformationn Characteristics and Pseudoelasticity in an Unidirectionally Solidified Cu-Al-Ni Based Alloy
|W. Y. Jang 2, K. H. Kim 2, Kwang K. Jee 1|
1. Korea Institute of Science and Technology, Material Science and Engineering Division, Seoul, Korea, South
Cu-Al-Ni based alloy rod could be fabricated by heated-mold continuous casting, which shows unidirectional solidification structure in the  direction and the γ2 phase was precipitated in matrix along cast direction. When the rod was betatized at the elevated temperature above 750℃, the γ2 phase is dissolved into the matrix so that Ms temperature was decreased. It could be also confirmed that both β1' and γ1' martensites coexited below - 20 ℃ by DSC measurement. The betatized rod showed pseudoelastic behavior but the stress-strain curves of compressive-deformed rods were not same with betatizing temperature; the stress-strain curves of the specimen betatized at 700℃ were linear but those of the rod betatized above 750 ℃ were non-linear.
Presentation: poster at E-MRS Fall Meeting 2005, Symposium C, by W. Y. Jang
See On-line Journal of E-MRS Fall Meeting 2005
Submitted: 2005-05-20 14:36 Revised: 2009-06-07 00:44