Internal Friction Analysis of Transformations in AuCuAl Alloy
The phase transformation in the as-quenched and aged Au7Cu5Al4 alloys were investigated by internal friction technique. The results show that Ms temperatures of the as-quenched and aged Au7Cu5Al4 alloys are -2.7°C and 13.8°C, respectively. The boundary relaxation activation energy for the quenched and aged Au7Cu5Al4 alloys were calculated for 131.5 kJ/mol and 93.0 kJ/mol, respectively, which indicates the difference of ordering states of the parent phases resulted by different thermal history. By high temperature internal friction measurement it is found that the B2 →L21 ordering transition is interrupted by quenching and the parent phase state of quenched Au7Cu5Al4 alloy shows B2 ordering, which suppresses martensitic transformation.
M. J. Jin et al., "Internal Friction Analysis of Transformations in AuCuAl Alloy," Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University, vol. 44, no. 5, pp. 609-612, Shanghai Jiaotong University, May 2010.
Materials Science and Engineering
Keywords and Phrases
Au-Cu-Al alloy; Internal friction; Martensitic transformation; Ordering transition
International Standard Serial Number (ISSN)
Article - Journal
© 2010 Shanghai Jiaotong University, All rights reserved.
01 May 2010