| Abnormal dynamic recrystallization behavior of a nickel based superalloy during hot deformation | |
| Jia, Dan1,2; Sun, Wenru2; Xu, Dongsheng2; Yu, Lianxu3; Xin, Xin2; Zhang, Weihong2; Qi, Feng2 | |
| Corresponding Author | Sun, Wenru(wrsun@imr.ac.cn) |
| 2019-05-30 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 787Pages:196-205 |
| Abstract | The dependence of hot deformation behavior and microstructure evolution of IN718 alloy on strain rate were studied by isothermal compression experiments. The tests were performed under the strain rates range of 10(-2) s(-1) similar to 20 s(-1) up to true strain of 1.2 at 1000 degrees C. Two peak value of the flow stress curve is observed at intermediate strain rate of 1 s(-1), which is different from the single-peak dynamic recrystallization (DRX) behavior. The microstructure characterization reveals that fine and uniform DRX grains are easily obtained both at lower and higher strain rates, while the smaller DRX grain size and elongated original grains with lower fraction of DRX exhibits at strain rate of 1 s(-1). The lower accumulated stored energy is detected by Kernal Average Misorientation (KAM) map at the strain rate of 1 s(-1), which serves as strong obstacle to the migration of grain boundaries, thus restricts the nucleation and growth of DRX. In addition, the formation of twin boundaries (including Sigma 3, Sigma 9 and Sigma 27 boundaries) during the hot deformation depend on the DRX grains size and the driving force which is sensitive to the strain rate. (C) 2019 Elsevier B.V. All rights reserved. |
| Keyword | IN718 alloy Strain rate Dynamic recrystallization Twinning |
| Funding Organization | Special Key R&D Project of Common Critical Technology Innovation in Key Industries of Chongqing |
| DOI | 10.1016/j.jallcom.2019.02.055 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Special Key R&D Project of Common Critical Technology Innovation in Key Industries of Chongqing[cstc2017zdcy-zdyFX0101] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000462592500024 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132635 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sun, Wenru |
| Affiliation | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Chongqing Skyrizon Aeroengines Co Ltd, Chongqing 401135, Peoples R China |
| Recommended Citation GB/T 7714 | Jia, Dan,Sun, Wenru,Xu, Dongsheng,et al. Abnormal dynamic recrystallization behavior of a nickel based superalloy during hot deformation[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,787:196-205. |
| APA | Jia, Dan.,Sun, Wenru.,Xu, Dongsheng.,Yu, Lianxu.,Xin, Xin.,...&Qi, Feng.(2019).Abnormal dynamic recrystallization behavior of a nickel based superalloy during hot deformation.JOURNAL OF ALLOYS AND COMPOUNDS,787,196-205. |
| MLA | Jia, Dan,et al."Abnormal dynamic recrystallization behavior of a nickel based superalloy during hot deformation".JOURNAL OF ALLOYS AND COMPOUNDS 787(2019):196-205. |
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