| Hot deformation behavior and workability of a Ni-Co based superalloy | |
| Liu, Peng1,2; Zhang, Rui1; Yuan, Yong3; Cui, Chuanyong1; Zhou, Yizhou1; Sun, Xiaofeng1 | |
| Corresponding Author | Cui, Chuanyong(chycui@imr.ac.cn) |
| 2020-08-05 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 831Pages:12 |
| Abstract | The hot deform ation behavior of a new N i-Co based alloy was investigated by the isothermal compression tests in a temperature range of 1060-1180 degrees C and a strain rate range of 0.01-10 s(-1) under a true strain of 0.693. The results show that the flow stress, corrected by friction and adiabatic heating, increases with the decreasing temperature and increasing strain rate. Considering the dissolution of the cprecipitates during hot deformation, the Arrhenius-type constitutive equations w ere established segmentally via fitting the corrected flow stress data. The activation energies for the gamma + gamma' dual-phase region and the gamma' single-phase region of the alloy are 671 and 391 kJ mol(-1), respectively. The reason for higher activation energy of the gamma + gamma' dual-phase region is that gamma' ((N i,Co)(3)(Al,Ti)) precipitates hinder dislocation slip and harden the alloys during hot deformation. The processing map based on the dynamic material model (DMM) was also constructed. According to the analysis of microstructural evolution, dynamic recrystallization (DRX) occurs under all deform ation conditions. The optim um hot deform ation processing conditions for the gamma + gamma' dual-phase region are 1060-1070 degrees C/0.01-0.02 s(-1) or 1070-1141 degrees C/ 0.01-1 s(-1). In addition, the optimal processing parameter for the gamma single-phase region is 1141-1175 degrees C/0.01-10 s(-1) (except a part of flow instability domain). (C) 2020 Elsevier B.V. All rights reserved. |
| Keyword | Ni-Co based Superalloy Hot deformation behavior Constitutive equation Processing map Microstructural evolution |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Science and Technology of China |
| DOI | 10.1016/j.jallcom.2020.154618 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51671189] ; Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000531727400001 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138877 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cui, Chuanyong |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Peng,Zhang, Rui,Yuan, Yong,et al. Hot deformation behavior and workability of a Ni-Co based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,831:12. |
| APA | Liu, Peng,Zhang, Rui,Yuan, Yong,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2020).Hot deformation behavior and workability of a Ni-Co based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,831,12. |
| MLA | Liu, Peng,et al."Hot deformation behavior and workability of a Ni-Co based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 831(2020):12. |
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