Journal
SCRIPTA MATERIALIA
Volume 54, Issue 9, Pages 1599-1604Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2006.01.017
Keywords
TiNiHf alloy; high temperature shape memory alloy; aging; martensitic transformation; microstructure
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(Ti + Hf)(3)Ni-4 particles precipitate in Ni-rich TiNiHf alloys aged at 823 K. The results show that the transformation temperatures of the alloys and their stability during thermal cycling increase noticeably because the (Ti + Hf)(3)Ni-4 particles strengthen the matrix. In addition, the martensite variants are preferentially oriented in the 823 K/5 h aged Ti29.4M50.6Hf20 alloy. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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