摘要
The microstructure evolution and its effect on flow stress of TC17 alloy during deformation in the α+β two-phase region were investigated via microstructure characterization and isothermal compression tests. Results showed that the spheroidized rate of α phase at 820 and 850 °C slightly increased with increasing strain. With increasing deformation temperature, the spheroidized rate of α phase showed a slight increasing trend, but the volume fraction of α phase significantly decreased. The flow stress at 780 °C and 1 s–1 decreased continuously and steady state condition was not achieved up to strain of 1.2 due to dislocation annihilation and α lamellae rotation. Under this condition, the dynamic spheroidization was retarded. At the deformation temperatures of 820 and 850 °C, and a strain rate of 1 s−1, a steady state flow stress was observed at strains above 0.8 due to the balance between work hardening and dynamic softening. The dynamic softening was attributed to the α lamellae rotation, dynamic recovery and a little spheroidization.
源语言 | 英语 |
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页(从-至) | 1430-1438 |
页数 | 9 |
期刊 | Transactions of Nonferrous Metals Society of China (English Edition) |
卷 | 29 |
期 | 7 |
DOI | |
出版状态 | 已出版 - 7月 2019 |