Hot compression behaviors and deformation mechanisms of a Ni-Co-based superalloy with columnar grains
文献类型：期刊论文
| 作者 | Zhou, Zijian1,2; Zhang, Rui1; Cui, Chuanyong1; Zhou, Yizhou1; Sun, Xiaofeng1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2022-01-26 |
| 卷号 | 833页码:12 |
| ISSN号 | 0921-5093 |
| 关键词 | Recrystallization Ni-Co-Based superalloy Directional solidification Constitutive equation Microstructural evolution |
| DOI | 10.1016/j.msea.2021.142370 |
| 通讯作者 | Zhang, Rui(rzhang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn) |
| 英文摘要 | In this work, hot compression behaviors and deformation mechanisms of a Ni-Co-based superalloy prepared using directional solidification (DS) were investigated by carrying out the isothermal compression tests within the temperature range of 1080-1190 degrees C and the strain rate range of 0.001-1 s(-1) under the true strain of 0.693. The effects of temperature and strain rate on dynamic recrystallization (DRX) were analyzed, and constitutive equations were established. The activation energies for gamma+gamma' dual-phase and the gamma single-phase regions of Ni-Co-based superalloy with columnar grains were 1190 kJ mol(-1) and 415 kJ mol(-1), respectively. The results showed that the dominant deformation mechanisms were closely related to the strain rate and temperature. DRX was accelerated at low strain rate conditions, while the DRX process was apparently sluggish at strain rates higher than 1 s(-1). The undissolved gamma' phase interacted with dislocations and accelerated the DRX of the matrix during gamma' sub-solvus temperature (1080-1120 degrees C) deformation. Continuous dynamic recrystallization (CDRX) nucleation proved to play a dominant role. During gamma' super-solvus temperature (1150-1190 degrees C) deformation, the dominant dynamic softening mechanism of the alloy is discontinuous dynamic recrystallization (DDRX). Local migration of grain boundaries (GBs) causes an increase of misorientation within the deformed grains and induced the formation of subgrain boundaries near the GBs, which subsequently evolved into high angle grain boundaries (HAGBs) and participated in DDRX. Furthermore, during high-temperature deformation in Ni-Co-based super alloys, the relatively rare microtwins (MTs) were detected under compression at 1100 degrees C/1 s(-1). |
| 资助项目 | National Key R&D Program of China[2019YFA0705304] ; National Key R&D Program of China[2017YFA0700703] ; National Science and Technology Major Project of China ; IMR Innovation Fund[2021-PY09] ; Doctoral Start-up Foundation of Liaoning Province |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000761604800002 |
| 资助机构 | National Key R&D Program of China ; National Science and Technology Major Project of China ; IMR Innovation Fund ; Doctoral Start-up Foundation of Liaoning Province |
| 源URL | [http://ir.imr.ac.cn/handle/321006/173156]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Rui; Cui, Chuanyong |
| 作者单位 | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Zijian,Zhang, Rui,Cui, Chuanyong,et al. Hot compression behaviors and deformation mechanisms of a Ni-Co-based superalloy with columnar grains[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,833:12. |
| APA | Zhou, Zijian,Zhang, Rui,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2022).Hot compression behaviors and deformation mechanisms of a Ni-Co-based superalloy with columnar grains.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,833,12. |
| MLA | Zhou, Zijian,et al."Hot compression behaviors and deformation mechanisms of a Ni-Co-based superalloy with columnar grains".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 833(2022):12. |
入库方式： OAI收割
来源：金属研究所
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