|
|
|
| Hot deformation behavior of a heat-resistant alloy without γ′-phase |
| Chen Dong1,2, Zheng‑dong Liu2, Zheng‑zong Chen2, Zhen Liu1,2, Jia‑zhuang Zheng1,2, Xi‑tao Wang1 |
| 1 Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China; 2 Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China |
|
|
|
|
Abstract The hot compression behavior of the nickel-based heat-resistant alloy C-HRA-2 was investigated by a Gleeble-1500 thermo-mechanical simulator with the deformation temperature range of 950–1150 °C and the strain rate of 0.001–10 s-1. The constitutive equation of the alloy was established by using a hyperbolic sine function, and the peak stress followed a power law relationship with the Zener–Hollomon parameter (Z). The activation energy was about 446 kJ mol-1 for the whole hot deformation domain in this alloy. The optimum hot deformation condition was obtained in the temperature range of 1050–1150 °C and the strain rate range of 0.005–0.1 s-1. Unsafe domains during the hot deformation would occur in the strain rate range of 0.1–10 s-1 with inhomogeneous microstructure and high-density twins in the alloy. The dominant nucleation mechanism of dynamic recrystallization (DRX) was continuous dynamic recrystallization with sub-grain rotation at high strain rate, while DRX at low strain rate was discontinuous dynamic recrystallization with original grain boundaries bulging.
|
|
|
|
|
|
| Cite this article: |
|
Chen Dong,Zheng‑dong Liu,Zheng‑zong Chen, et al. Hot deformation behavior of a heat-resistant alloy without γ′-phase[J]. Journal of Iron and Steel Research International, 2020, 27(7): 820-833.
|
|
|
|
| [1] |
Hai Wang, Dong Liu, Jian‑guo Wang, Hai‑ping Wang, Yang Hu, Hao‑dong Rao. Characterization of hot deformation behavior of 30Si2MnCrMoVE low-alloying ultra-high-strength steel by constitutive equations and processing maps[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(7): 807-819. |
| [2] |
Meng-du Peng, Jie Shi, Wen-chao Yu, Bing Cui, Ting Sun, Xiao-yuan Li, Mao-qiu Wang. Hot working process optimization of Fe–20Mn–19Cr–0.5C–0.6N steel by activation energy, power dissipation and microstructural evolution[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(8): 856-865. |
| [3] |
Chao-hang Jia, Chen-xi Liu, Yong-chang Liu, Chong Li, Hui-jun Li. Microstructural evolution and constitutive models of 9CrMoCoB heatresistant steel during high-temperature deformation[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(11): 1228-1239. |
| [4] |
Yan-sen Hao, Jian Li, Wan-chun Liu, Wei-na Zhang, Zhen-yu Liu. On microstructure characterization of Fe–Cr–Ni–Mo–N super-austenitic stainless steel during hot deformation[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(10): 1080-1087. |
| [5] |
Zhi-qiang Yang . Zheng-dong Liu . Xi-kou He . Shi-bin Qiao . Chang-sheng Xie ,. ConstitutivemodelingandcriticalstrainofdynamicrecrystallizationinSA508Gr.4Nsteelforadvancedpressurevesselmaterials[J]. , 2018, 25(11): 1189-1197. |
| [6] |
Peng-tao Liu,, ? Qing-xue Huang,, ? Li-feng Ma, ? Tao Wang. Characterization of hot deformation behavior of wear-resistant steel BTW1 using processing maps and constitutive equations[J]. , 2018, 25(10): 1054-1061. |
|
|
|
|
2020, Vol. 27 
