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Licensed Unlicensed Requires Authentication Published by De Gruyter February 7, 2014

Ingot metallurgy and microstructural characterization of Ti–Ta alloys

Jian Zhang, Ramona Rynko, Jan Frenzel, Christoph Somsen and Gunther Eggeler

Abstract

In the present work we perform a detailed investigation of ingot metallurgy processing routes of Ti-30Ta, a shape memory alloy with a good potential for applications at higher temperatures. There is currently considerable interest in high temperature shape memory alloys, both in industry (automotive and aerospace applications) and in academia. By means of scanning electron microscopy, we provide recommendations on the number of remelting cycles in the vacuum arc melting process, and on annealing temperatures/times in order to obtain chemical homogeneity. It is also shown that this is required to obtain well defined differential scanning calorimeter charts, which facilitates characterization and investigations of martensitic transformation in this alloy. Areas in need of further work are identified.


* Correspondence address, Dr. Jian Zhang, Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany, Tel.: +49 (0)211 6792 322, E-mail:

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Received: 2013-06-13
Accepted: 2013-08-26
Published Online: 2014-02-07
Published in Print: 2014-02-10

© 2014, Carl Hanser Verlag, München