Paper Title:
Effect of Microstructure on Martensitic Transformation and Cyclic Deformation Characteristics in a Cu-Al-Ni Based Alloy with Unidirectionally Solidified Structure
  Abstract

The effect of the betatizing conditions on microstructure, transformation characteristics and pseudoelastic behavior has been studied in an unidirectionally solidified Cu-Al-Ni based alloy. The coarse γ2 phase is precipitated in the cast-rod betatized at 650 and the volume fraction of it is decreased by increasing the betatizing temperature above 700 . However, a small amount of γ2 phase is left behind despite betatizing at 800 . No martensitic transformation takes place in the cast-rod betatized at 650, because the precipitation of γ2 phase leads to stabilization of β1 parent phase. However, β1→β1′ martensitic transformation occurs in the cast-rod betatized at 700  and both β1→β1′ and β1→γ1′ martensitic transformations concurrently undergoes in the cast-rod betatized above 750  because of the slope of Al concentration nearby γ2 phase. The loaddisplacement loop of the as-cast rod betatized at 750  is linear, but those of the as-cast rods betatized at 800  and 850  are non-linear showing the typical pseudoelastic loop and the deformation is completely recovered upon unloading.

  Info
Periodical
Solid State Phenomena (Volume 118)
Edited by
Jang Hyun Sung, Chan Gyu Lee, Yong Zoo You, Young Kook Lee and Jae Young Kim
Pages
491-496
DOI
10.4028/www.scientific.net/SSP.118.491
Citation
G. S. Yang, K.H. Kim, K. M, K. K. Jee, W. Y. Jang, "Effect of Microstructure on Martensitic Transformation and Cyclic Deformation Characteristics in a Cu-Al-Ni Based Alloy with Unidirectionally Solidified Structure", Solid State Phenomena, Vol. 118, pp. 491-496, 2006
Online since
December 2006
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