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Hydrogen-induced amorphization and embrittlement resistance in Ti-based in situ composite with bcc-phase in an amorphous matrix

Published online by Cambridge University Press:  03 March 2011

S. Jayalakshmi ,
J.P. Ahn ,
K.B. Kim  and
E. Fleury
S. Jayalakshmi
Affiliation:
Advanced Metals Research Center, Korea Institute of Science and Technology (KIST), Cheongryang, Seoul 130-650, Korea
J.P. Ahn
Affiliation:
Advanced Analysis Center, Korea Institute of Science & Technology (KIST), Cheongryang, Seoul 130-650, Korea
K.B. Kim
Affiliation:
Advanced Metals Research Center, Korea Institute of Science and Technology (KIST), Cheongryang, Seoul 130-650, Korea
E. Fleury*
Affiliation:
Advanced Metals Research Center, Korea Institute of Science and Technology (KIST), Cheongryang, Seoul 130-650, Korea
*
a) Address all correspondence to this author. e-mail: efleury@kist.re.kr
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Abstract

We report the hydrogenation characteristics and mechanical properties of Ti50Zr25Cu25 in situ composite ribbons, composed of β-Ti crystalline phase dispersed in an amorphous matrix. Upon cathodic charging at room temperature, high hydrogen absorption up to ∼60 at.% (H/M = ∼1.2) is obtained. At such a high concentration, hydrogen-induced amorphization occurs. Mechanical tests conducted on the composite with varying hydrogen concentrations indicate that the Ti50Zr25Cu25 alloy is significantly resistant to hydrogen embrittlement when compared to conventional amorphous alloys. A possible mechanism that would contribute toward hydrogen-induced amorphization and hydrogen embrittlement is discussed.

Keywords

AmorphousEmbrittlementHydrogenation
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 2 , September 2006 , pp. 428 - 436
Copyright
Copyright © Materials Research Society 2007

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