Dynamic recrystallization behavior of GH4169G alloy during hot compressive deformation
Jia, Dan1,2; Sun, Wenru2; Xu, Dongsheng2; Liu, Fang2
Corresponding AuthorSun, Wenru(
AbstractThe microstructure evolutions and nucleation mechanisms of GH4169G alloy were studied by optical microscope, electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The hot compression tests were performed different imposed reductions in the range of true strain from 0.12 to 1.2 at the temperatures of 930 degrees-1050 degrees with strain rates of 0.01 s(-1)-1 s(-1). It is found that cumulative and local misorientation increase firstly and then decrease when the strain is increased due to the progress of dynamic recrystallization (DRX). The low angle boundaries (LAGBs) rapidly develop to high angle boundaries (HAGBs) at relatively high deformation temperature or the low strain rate. There are three DRX mechanisms observed for GH4169 G alloy during hot deformation. Discontinuous dynamic recrystallization (DDRX) as the dominant mechanism for GH4169 G alloy is characterized by typical necklace structures and bulged-original boundaries. Besides, different deformation bands with dislocation cells formed in deformed matrix at low temperature and large strain, which indicates that continuous dynamic recrystallization (CDRX) contributed to the DRX process. The twin boundaries lost their coherent characteristics and provide sites for nucleation, which also accelerates the nucleation of DRX. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordGH4169G alloy Dynamic recrystallization Nucleation mechanism
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000475870600006
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSun, Wenru
Affiliation1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Jia, Dan,Sun, Wenru,Xu, Dongsheng,et al. Dynamic recrystallization behavior of GH4169G alloy during hot compressive deformation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):1851-1859.
APA Jia, Dan,Sun, Wenru,Xu, Dongsheng,&Liu, Fang.(2019).Dynamic recrystallization behavior of GH4169G alloy during hot compressive deformation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),1851-1859.
MLA Jia, Dan,et al."Dynamic recrystallization behavior of GH4169G alloy during hot compressive deformation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):1851-1859.
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