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The influence of prior cold deformation on precipitation of alpha phase and variation of hardness in Ti-10Mo-8V-1Fe-3.5Al during aging treatment

Published online by Cambridge University Press:  31 January 2011

Z.Y. Song ,
Q.Y. Sun ,
L. Xiao ,
L. Liu ,
H. Wang ,
W. Chen ,
J. Sun  and
P. Ge
J. Sun*
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
P. Ge
Affiliation:
Northwest Institute for Nonferrous Metal Research, Xi'an 710016, People's Republic of China
*
a) Address all correspondence to this author. e-mail: junsun@mail.xjtu.edu.cn
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Abstract

The influence of prior cold deformation on precipitating of alpha phase as well as the variation of hardness during aging has been investigated in solution-treated Ti-10Mo-8V-1Fe-3.5Al alloys. The results show that alpha phase precipitation could be obviously accelerated by the prior cold deformation. In the predeformed samples, a network pattern structure was observed with an optical microscope after aging treatment. It could be attributed to the phenomenon that the plate-shape alpha precipitates prefer to nucleate and grow in the regions with a high density of dislocations, especially inside slip bands. The hardness of both the predeformed and undeformed TB3 specimens after different aging times was measured and further predicted by a proposed strengthening model based on the grain refinement mechanism of the beta phase. The predicted results are consistent with the experimental results, especially in the later aging stages.

Keywords

MicrostructureStrengthTi
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 452 - 458
Copyright
Copyright © Materials Research Society 2009

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