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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 160258, 9 pages
http://dx.doi.org/10.1155/2014/160258
Research Article

Surface Hardening of Ti-15V-3Al-3Cr-3Sn Alloy after Cyclic Hydrogenation and Subsequent Solution Treatment

1Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan
2Department of Materials Engineering, Tatung University, Taipei 10451, Taiwan

Received 24 November 2013; Accepted 9 February 2014; Published 12 March 2014

Academic Editor: Ming-Xing Zhang

Copyright © 2014 Chia-Po Hung et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The as-received and preheated (1000°C-30 min. and 500°C-30 min.) sheets of Ti-15V-3Al-3Cr-3Sn alloy (Ti-153) were treated according to the predetermined process including a cyclic electrolytic hydrogenation (at 50 mA/cm2 for 1 hr and at 5 mA/cm2 for 10 hrs) combining a subsequent solution treatment to see the effects of various operating parameters on the evolution of microstructure and the variations of hardness. The hardening effect deriving from solid-solution strengthening of hydrogen eventually overrode that from precipitation hardening. The maximum hardness elevation was from 236.9 to 491.1 VHN.