MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Fabrication of Ultrafine-Grained Ti66Nb18Cu6.4Ni6.1Al3.5 Composites with High Strength and Distinct Plasticity by Spark Plasma Sintering and Crystallization of Amorphous Phase
Weiping ChenXuemei WuChao YangXiaoqiang LiMindan ChenYuanyuan Li
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2012 Volume 53 Issue 3 Pages 531-536

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Abstract

Ductile ultrafine-grained composites in Ti66Nb18Cu6.4Ni6.1Al3.5 alloy with high Nb/Ti ratio were fabricated by spark plasma sintering and crystallization of amorphous phase. Microstructure observations shows that all alloys encompass body-centered cubic β-Ti and face-centered cubic (Cu, Ni)-Ti2 regions but display different microstructures. The alloys exhibit a high fracture strength as high as 2365 MPa as well as distinct fracture strain of ∼7.6%. The results obtained provide a promising method for fabrication of two-phase composites with good combination of strength and ductility by powder metallurgy.

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© 2012 The Japan Institute of Metals and Materials
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