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Abnormal dynamic recrystallization behavior of a nickel based superalloy during hot deformation
Jia, Dan; Sun, Wenru; Xu, Dongsheng; Yu, Lianxu; Xin, Xin; Zhang, Weihong; Qi, Feng
2019-05-30
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume787Pages:196-205
AbstractThe 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.
KeywordIN718 alloy Strain rate Dynamic recrystallization Twinning
Indexed BySCI
Language英语
WOS IDWOS:000462592500024
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81073
Collection中国科学院金属研究所
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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