Strain-rate dependence of the dynamic softening in a duplex stainless steel

doi:10.1016/j.matchar.2020.110219

CORC > 金属研究所 > 中国科学院金属研究所

	Strain-rate dependence of the dynamic softening in a duplex stainless steel
	Chen, Wenxiong 1,2; Zheng, Chengwu 1,2; Jia, Chunni 1,2; Hu, Baojia 1,2; Li, Dianzhong 1,2
刊名	MATERIALS CHARACTERIZATION
	2020-04-01
卷号	162 页码:12
关键词	Duplex stainless steel Dynamic softening Strain rate Ferrite Austenite
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110219
通讯作者	Zheng, Chengwu(cwzheng@imr.ac.cn)
英文摘要	The 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.
资助项目	National Natural Science Foundation of China[51771192] ; National Natural Science Foundation of China[51371169] ; National Natural Science Foundation of China[51401214]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000539353900035
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139306]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zheng, Chengwu
作者单位	1.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
推荐引用方式 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.