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Strain-rate dependence of the dynamic softening in a duplex stainless steel
Chen, Wenxiong1,2; Zheng, Chengwu1,2; Jia, Chunni1,2; Hu, Baojia1,2; Li, Dianzhong1,2
Corresponding AuthorZheng, Chengwu(cwzheng@imr.ac.cn)
2020-04-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume162Pages:12
AbstractThe dynamic softening mechanism of a 2205 duplex stainless steel is comprehensively investigated through hot compression at the temperature of 1000 degrees C and the strain rates of 0.01 to 10 s(-1). It is shown that an increase in the strain rate leads to a marked transition in the softening mechanism of ferrite. The ferrite is found to soften through the sub-grain coalescence at a low strain rate of 0.01 s(-1) and via the continuous dynamic recrystallization (CDRX) at an intermediate strain rate of 1 s(-1). While, at a high strain rate of 10 s(-1), a softening mechanism akin to the discontinuous dynamic recrystallization (DDRX) is observed taking place. The applicable softening mechanism of ferrite in the duplex steel is largely associated with the formation of misoriented subgrains and their evolution adapted to applied strain rates. By contrast, the softening within austenite is remarkably limited at all applied strain rates. At the low strain rate of 0.01 s(-1), the dynamic softening may start through a mechanism analogous to the CDRX. Whereas the DRX nucleation at the high strain rate of 10 s(-1) mainly occurs through the strain-induced boundary migration (SIBM). At the intermediate strain rate of 1 s(-1), however, sluggish kinetics of DRX in austenite is observed since the two kinds of nucleation mechanisms both are depressed.
KeywordDuplex stainless steel Dynamic softening Strain rate Ferrite Austenite
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.matchar.2020.110219
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51771192] ; National Natural Science Foundation of China[51371169] ; National Natural Science Foundation of China[51401214]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000539353900035
PublisherELSEVIER SCIENCE INC
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139305
Collection中国科学院金属研究所
Corresponding AuthorZheng, Chengwu
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Wenhua Rd 72, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Chen, Wenxiong,Zheng, Chengwu,Jia, Chunni,et al. Strain-rate dependence of the dynamic softening in a duplex stainless steel[J]. MATERIALS CHARACTERIZATION,2020,162:12.
APA Chen, Wenxiong,Zheng, Chengwu,Jia, Chunni,Hu, Baojia,&Li, Dianzhong.(2020).Strain-rate dependence of the dynamic softening in a duplex stainless steel.MATERIALS CHARACTERIZATION,162,12.
MLA Chen, Wenxiong,et al."Strain-rate dependence of the dynamic softening in a duplex stainless steel".MATERIALS CHARACTERIZATION 162(2020):12.
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