Constitutive equation and microstructure evolution of TiAl alloy during hot deformation

Shiwei Tian; Zhenyu Yang; Siyuan Zhang; Zhiqian Liao; Yongjun Zhang; Yonggang Yang; Yulai Chen; Haitao Jiang

doi:10.1088/2053-1591/acfc99

Materials Research Express (Jan 2023)

Constitutive equation and microstructure evolution of TiAl alloy during hot deformation

Shiwei Tian,
Zhenyu Yang,
Siyuan Zhang,
Zhiqian Liao,
Yongjun Zhang,
Yonggang Yang,
Yulai Chen,
Haitao Jiang

Affiliations

Shiwei Tian: ORCiD; National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China; Luoyang Ship Material Research Institute , 471026, Luoyang, People’s Republic of China
Zhenyu Yang: National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China
Siyuan Zhang: National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China
Zhiqian Liao: Luoyang Ship Material Research Institute , 471026, Luoyang, People’s Republic of China
Yongjun Zhang: National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China
Yonggang Yang: National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China
Yulai Chen: National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China
Haitao Jiang: ORCiD; National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, 100083, Beijing, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/acfc99
Journal volume & issue: Vol. 10, no. 10
p. 106516

Abstract

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The hot deformation behavior of TiAl alloy is analyzed by combining the true stress–strain curve and microstructure analysis. The results show that the flow stress of TiAl alloy presents the characteristics of work hardening-dynamic softening, it increases with the increase of strain rate and decreases with the increase of temperature. Based on the true stress–strain curves, the flow stress of TiAl alloy under different deformation conditions is predicted by hyperbolic sinusoidal formula. In addition, the effects of deformation temperature and strain rate on the microstructure evolution of TiAl alloy are revealed. In the process of hot compression deformation, dynamic recrystallization and γ → α , β → α phase transformation occurs. During tensile deformation, TiAl alloy exhibits super-plasticity, which is mainly due to grain rotation and coordinated deformation of β phase.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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