Effect of grain boundary migration in Cu–Cr–Zr–Ti manufactured using different casting processes

ABSTRACT

Grain boundary migration in different casting processes directly affects the grain size of the ingot, which affects the mechanical properties of the alloy. In this study, Cu–Cr–Zr–Ti rods are manufactured using upward continuous casting and casting-extrusion processes followed by drawing. It is found that the strength of the upward continuous casting rods is 621 MPa, greater than that of the casting-extrusion rods 571 MPa, which is a result of different microstructure evolution during solution treatment. Calculations of the driving force and resistance of grain boundary migration were performed to explain the observations.

KEYWORDS:

• Cu–Cr–Zr–Ti
• casting
• tensile strength
• grain boundary migration
• recrystallization
• cold drawing
• solution treatment
• aging treatment
• recrystallization

Acknowledgements

The authors express their thanks to Dr Jianbo Zhang, Dr Xiangpeng Xiao, Dr Hao Huang, Dr Haigen Wei and Dr Sarah Dodds.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Weibin Xie http://orcid.org/0000-0003-1830-3862

Additional information

Funding

This work is financially supported by the National Key Research and Development Program of China [grant number 2016YFB0301400], the Youth Jinggang Scholars Program in Jiangxi Province and Ganzhou Talent Program.