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Modeling the Dynamic Recrystallization of Mg-11Gd-4Y-2Zn-0.4Zr Alloy Considering Non-uniform Deformation and LPSO Kinking During Hot Compression
Zhang, Hong-Xuan; Chen, Shuai-Feng; Cheng, Ming; Zheng, Ce; Zhang, Shi-Hong
2019-09-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume32Issue:9Pages:1122-1134
AbstractHot compression tests of Mg-11Gd-4Y-2Zn-0.4Zr alloy (GWZK114) were conducted at a deformation temperature range of 300-500 degrees C and a strain rate range of 0.01-10.0s(-1). Based on systematic microstructure observation, it is confirmed that long period stacking ordered (LPSO) phase displays essential and evolving roles on the dynamic recrystallization (DRX) behavior. The results indicate that the plastic deformation is mainly coordinated by simultaneous exist of LPSO kinking of lamella 14H-LPSO phase and DRX at 350-450 degrees C, and DRX at 500 degrees C. Further, it is found that the LPSO kinking induced during 350-450 degrees C can delay the DRX. A phenomenological DRX model of GWZK114 alloy is established to be XDRX=1-exp[-0.5(epsilon-epsilon c epsilon)0.91]. Non-uniform distribution of plastic strain during compression was considered via finite element method and it ensures a good prediction of DRX fraction under a large plastic strain. Meanwhile, an enhanced DRX model, taking its formulation as XDRX={1-exp[-0.5(epsilon-epsilon c epsilon)0.91]}(T226.8-1)n, n=3.82 epsilon(0.083), is proposed for the first time to capture the hindering effect of 14H-LPSO kinking on DRX behavior. The predicted results of this enhanced DRX model agree well with the experimental cases, where 14H-LPSO kinking is dominated or partially involved (300-450 degrees C). Besides, a size model of DRX grains is also established and can depict the evolution of DRX grain size for all the investigated compression conditions with accounting for temperature rising at high strain rates (5s(-1) and 10s(-1)).
KeywordMg-11Gd-4Y-2Zn-0 4Zr alloy Modeling Dynamic recrystallization Non-uniform strain LPSO kinking
Indexed BySCI
Language英语
WOS IDWOS:000477005900007
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80799
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Hong-Xuan,Chen, Shuai-Feng,Cheng, Ming,et al. Modeling the Dynamic Recrystallization of Mg-11Gd-4Y-2Zn-0.4Zr Alloy Considering Non-uniform Deformation and LPSO Kinking During Hot Compression[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(9):1122-1134.
APA Zhang, Hong-Xuan,Chen, Shuai-Feng,Cheng, Ming,Zheng, Ce,&Zhang, Shi-Hong.(2019).Modeling the Dynamic Recrystallization of Mg-11Gd-4Y-2Zn-0.4Zr Alloy Considering Non-uniform Deformation and LPSO Kinking During Hot Compression.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(9),1122-1134.
MLA Zhang, Hong-Xuan,et al."Modeling the Dynamic Recrystallization of Mg-11Gd-4Y-2Zn-0.4Zr Alloy Considering Non-uniform Deformation and LPSO Kinking During Hot Compression".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.9(2019):1122-1134.
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