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Ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 composites fabricated by spark plasma sintering and crystallization of amorphous phase

Published online by Cambridge University Press:  31 January 2011

Y.Y. Li ,
C. Yang ,
W.P. Chen ,
X.Q. Li  and
S.G. Qu
Y.Y. Li*
Affiliation:
School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
S.G. Qu
Affiliation:
School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

We report on the formation of ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 composites with in situ precipitated micrometer-sized β-Ti(Nb) phase by spark plasma sintering with crystallization. Microstructure analysis indicated that all alloys consisted of soft (Cu, Ni)Ti2 regions surrounded by hard β-Ti(Nb) regions but displayed different microstructures. The alloys exhibited high fracture strength of more than 2200 MPa and remarkable plasticity of ∼25%. The results provided a promising method for fabricating large-sized bulk composites with excellent mechanical properties by powder metallurgy.

Keywords

AmorphousSintering
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 6 , June 2009 , pp. 2118 - 2122
Copyright
Copyright © Materials Research Society 2009

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