Paper Title:
Martensitic Transformation of TiAu Shape Memory Alloys
  Abstract

Martensitic transformation temperatures were measured and transformation strains were evaluated in a promising high temperature shape memory alloy TiAu with a compositional range from 46 to 53mol%Au. It was found by differential scanning calorimetry that martensitic transformation start temperature (Ms) is kept almost constant value of 880K in the Au-rich side of the stoichiometric composition. On the other hand, Ms decreases monotonically with decreasing Au content in the Au-poor side. X-ray diffraction analysis revealed that apparent phase of all the alloys at room temperature is B19 martensite phase. Under an assumption that the atomic volume is constant during martensitic transformation, the lattice parameters of B2 parent phase and maximum transformation strain were calculated. It was found that the maximum transformation strain depends on chemical composition and that it reaches 10.75% for Ti-53mol%Au alloy. The value is comparable to that of Ti-Ni.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1541-1544
DOI
10.4028/www.scientific.net/MSF.561-565.1541
Citation
H. Hosoda, R. Tachi, T. Inamura, K. Wakashima, S. Miyazaki, "Martensitic Transformation of TiAu Shape Memory Alloys", Materials Science Forum, Vols. 561-565, pp. 1541-1544, 2007
Online since
October 2007
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: Thomas L. Christiansen, Marcel A.J. Somers
Abstract:On evaluating lattice strain-depth or stress-depth profiles with X-ray diffraction, the variation of the information depth ...
91
Authors: Hi Won Jeong, Seung Eon Kim, Chang Yong Jo, Yong Tae Lee, Joong Kuen Park
Abstract:The titanium alloys containing the Nb transition elements have been investigated as the Ni-free shape memory and the biomedical alloys with...
1669
Authors: David Shepherd, Serena Best
Abstract:Zinc substituted hydroxyapatite of varying wt% was produced using a precipitation method based on reacting calcium and zinc nitrate with...
159
Authors: H. Kaffash, Ali Shokuhfar, Hamid Reza Rezaie, Ehsan Mostaed, Ali Mostaed
Abstract:Fabrication of alloys in the solid state via mechanical alloying (MA) process has been studied by earlier researchers. The effects of milling...
1262
Authors: Yu Hua Zhu
Abstract:The influence of grain size on the lattice constant in some nanocrystallites was studied by in experiment. It is found that the lattice...
607