| Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy | |
| Zhang, Rui; Tian, Chenggang; Cui, Chuanyong; Zhou, Yizhou; Sun, Xiaofeng | |
| Corresponding Author | Cui, Chuanyong(chycui@imr.ac.cn) |
| 2020-03-25 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 818Pages:8 |
| Abstract | For investigating the Portevin-Le Chatelier (PLC) effect in a wrought Ni-Co based superalloy with low stacking fault energy, the tensile tests of Ni-30%Co based superalloy within the temperature range of 350-550 degrees C and strain rate range of 3 x 10(-5) -3 x 10(-3) s(-1) were carried out. The microstructures were observed by optical microscope (OM) and transmission electron microscope (TEM). The serrated flow of stress-strain curves exhibited various characteristics based on the deformation conditions. The serrations transformed from type-A to type-C with increasing temperature or decreasing strain rate. The normal and inverse PLC effects were analyzed based on unpinning and pinning of mobile dislocations. The microstructural evolution shown that the deformation mechanisms were dislocation slip and stacking fault. Additionally, the tests of sample with large high-density stacking faults revealed that the amplitude of stress drop was determined by strength of the solute and microtwin obstacles. (C) 2019 Elsevier B.V. All rights reserved. |
| Keyword | PLC effect Ni-Co based superalloy Deformation condition Microtwin |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Science and Technology of China |
| DOI | 10.1016/j.jallcom.2019.152863 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[5167189] ; National Natural Science Foundation of China[51271174] ; Ministry of Science and Technology of China[2017YFA0700703] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000506166900103 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136374 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cui, Chuanyong |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Rui,Tian, Chenggang,Cui, Chuanyong,et al. Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,818:8. |
| APA | Zhang, Rui,Tian, Chenggang,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2020).Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,818,8. |
| MLA | Zhang, Rui,et al."Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 818(2020):8. |
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