Open Access
Article Number 02011
Number of page(s) 4
Section Principles, Simulations, Materials: Background
Published online 01 September 2009
ESOMAT 2009, 02011 (2009)
DOI: 10.1051/esomat/200902011

Aging effect on martensitic transformation at cryogenic temperatures in Cu-Al-Mn alloy

S. Ii1, K. Tsuchiya1 and T. Koyano1, 2

1  National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
2  Cryogenic division, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan

Published online: 1 September 2009

Aging effect on martensitic transformation in Cu83-XAl17MnX shape memory alloys (X = 10,12,14,16 and 18) have been investigated by electrical resistivity (ER) and differential scanning calorimeter (DSC) measurements. In Cu71Al17Mn12 aged at 373 K for 0.6 ks, we found that martensitic transformation occurred at around 100K in ER measurement. It was also confirmed that the transformation temperatures increased with aging temperature and time. In addition, an enthalpy of reverse transformation increased with aging temperature, but it exhibited no systematic dependence on the aging time. The enthalpy of reverse transformation in Cu71Al17Mn12 alloy aged at 473K for 0.6ks (As = 200 K), was estimated to be about 150 J/mol by DSC measurements, which is nearly equal to that in Cu-Al-Mn alloy transformed at around room temperature.

© Owned by the authors, published by EDP Sciences 2009