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Microstructure evolution and mechanical properties of Zr–45Ti–5Al–3V alloy processed by electric field-assisted extrusion

Published online by Cambridge University Press:  02 November 2016

Chunxiang Zhang ,
Limin Wang ,
Riping Liu ,
Bojun Zhao  and
Junting Luo
Chunxiang Zhang
Affiliation:
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Limin Wang
Affiliation:
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Riping Liu
Affiliation:
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Bojun Zhao
Affiliation:
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Junting Luo*
Affiliation:
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China; and Education Ministry Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Qinhuangdao 066004, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The electric field-assisted extrusion process is applied in Zr–45Ti–5Al–3V alloy. A transition from phase α to phase β is observed at various zones during the extrusion, and a complete transition is achieved by the considerable shear deformation. When subjected to the electric field-assisted extrusion, the continuous dynamic recrystallization is significant at the edges and the major shear deformation zones, and the equiaxed phase β grain structure is refined to a size of 250–300 µm. In addition, the phase β grains contain a minor amount of large residual lath-shaped phase α structures. The edges and the major shear deformation zones form a cubic texture along the {100}〈001〉 direction with a slightly weak polarity, while the polarity of the texture at the center is strong. The extrusion is found to decrease the edge strength from 1580 MPa to 1185 MPa and to increase the elongation up to 7.2%.

Keywords

alloycrystalmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 22 , 28 November 2016 , pp. 3580 - 3587
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Copyright
Copyright © Materials Research Society 2016 

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References

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