Paper Title:
Dynamic Behavior of Two Types of Martensitic Transformations in Cu-Al-Ni Shape Memory Alloy Single Crystal by Acoustic Emission Method
  Abstract

Dynamic behavior of two types of martensitic transformations during tensile deformation of Cu-Al-Ni shape memory alloy single crystal has been investigated using an acoustic emission waveform analysis. Two kinds of martensitic transformations consist of β1 ⇔ β1′ (structural change of DO3 to 18R) and β1 ⇒ γ1′ (structural change of DO3 to 2H), each of which is called super-elastic and thermo-elastic martensitic transformations, respectively. These two types of martensitic transformations could be obtained during tensile deformation because of different heat treatment. The rise time at the source (the source rise time) in finite elastic solid by the modified Takashima’s method was analyzed using the acoustic emission waveform detected during the martensitic transformation. The mean source rise time to the γ1′ phase was smaller than that to the β1′ phase before yielding and became the same after yielding. The former result means that the nucleation of the γ1′ phase is faster than that of the β1′ phase because of different crystallographic structure. The latter result is that the growth rate of the γ1′ phase is the same as that of the β1′ phase.

  Info
Periodical
Advanced Materials Research (Volumes 13-14)
Edited by
R. Pullin, K.M. Holford, S.L. Evans and J.M. Dulieu-Barton
Pages
305-312
DOI
10.4028/www.scientific.net/AMR.13-14.305
Citation
K. Yoshida, T. Yasuda, D. Tani, H. Nishino, "Dynamic Behavior of Two Types of Martensitic Transformations in Cu-Al-Ni Shape Memory Alloy Single Crystal by Acoustic Emission Method", Advanced Materials Research, Vols. 13-14, pp. 305-312, 2006
Online since
February 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Seok Jae Lee, Young Kook Lee
Abstract:There are many empirical equations for predicting martensite start temperature (Ms) and the kinetics models of martensitic transformation of...
3169
Authors: Jae Hwa Lee, Takashi Fukuda, Tomoyuki Kakeshita
Abstract:We have found that solution-treated or sensitized SUS304L stainless steel transforms isothermally from the γ (fcc)-phase to the α' (bcc)...
2333
Authors: Han Sol Kim, Won Yong Kim
Abstract:Pseudoelastic behavior of Ti-xNb-yGe alloys, where x=22~28at.% and y=0.5~2.0at.%, was investigated by controlling martensite start...
145
Authors: Tomoyuki Kakeshita, Takashi Fukuda, Yong-Hee Lee
Abstract:We have investigated athermal and isothermal martensitic transformations (typical displacive transformations) in Fe–Ni, Fe–Ni–Cr, and...
90
Authors: Yong Zhi Cai
Optical/Electronic/Magnetic Materials
Abstract:Temperature characteristics are essential to reasonable application of Ni-Mn-Ga alloy. This paper reports an experiment equipment which is...
1232