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On-line Access: 2010-10-05

Received: 2010-04-02

Revision Accepted: 2010-07-06

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Journal of Zhejiang University SCIENCE A 2010 Vol.11 No.10 P.738-743

http://doi.org/10.1631/jzus.A1000138


Promoting the mechanical properties of Ti42Al9V0.3Y alloy by hot extrusion in the α+β phase region


Author(s):  Wen-chen Xu, Hao Zhang, De-bin Shan

Affiliation(s):  Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Corresponding email(s):   shandb@hit.edu.cn

Key Words:  TiAl alloy, Microstructure, Mechanical property, Hot extrusion


Wen-chen Xu, Hao Zhang, De-bin Shan. Promoting the mechanical properties of Ti42Al9V0.3Y alloy by hot extrusion in the α+β phase region[J]. Journal of Zhejiang University Science A, 2010, 11(10): 738-743.

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author="Wen-chen Xu, Hao Zhang, De-bin Shan",
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%T Promoting the mechanical properties of Ti42Al9V0.3Y alloy by hot extrusion in the α+β phase region
%A Wen-chen Xu
%A Hao Zhang
%A De-bin Shan
%J Journal of Zhejiang University SCIENCE A
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%P 738-743
%@ 1673-565X
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000138

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T1 - Promoting the mechanical properties of Ti42Al9V0.3Y alloy by hot extrusion in the α+β phase region
A1 - Wen-chen Xu
A1 - Hao Zhang
A1 - De-bin Shan
J0 - Journal of Zhejiang University Science A
VL - 11
IS - 10
SP - 738
EP - 743
%@ 1673-565X
Y1 - 2010
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000138


Abstract: 
hot extrusion was conducted in the α+β phase region for promoting mechanical properties of Ti42Al9V0.3Y. The microstructures and tensile properties before and after hot extrusion were studied. The results show that the microstructure of the as-cast alloy mainly consists of massive γ phase in β matrix and the as-extruded alloy mainly consists of lamellar α2/γ, lamellar β/γ, and strip γ propagating from elongated β phase. In the as-cast alloy, the predominantly observed fracture mode is transgranular cleavage failure at room temperature and intergranular fracture at 650–750 °C. After hot extrusion, it transforms into transgranular cleavage-like failure, including translamellar cleavage and delamination. The excellent tensile properties of the as-extruded material are attributed to the obvious refined microstructure with broken YAl2 particles and the micro-crack shielding action of the TiAl lamellasome.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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