High-Temperature Plasticity Enhanced by Multiple Secondary Phases in a High-Si Austenitic Stainless Steel

doi:10.1007/s40195-022-01388-5

IMR OpenIR

	High-Temperature Plasticity Enhanced by Multiple Secondary Phases in a High-Si Austenitic Stainless Steel
	Chen, Sihan 1,2,3; Liang, Tian 1,3; Ma, Guangcai 1,3; Zheng, Chengwu 4; Chen, Deli 5; Ma, Yingche 1,3; Liu, Kui 1,3
通讯作者	Liang, Tian(tliang@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn)
	2022-02-16
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
页码	12
摘要	An austenitic stainless steel with 6 wt% Si and multiple secondary phases was produced with the aim to achieve enhanced plasticity during hot deformation. The microstructure of the steel after fracture was characterized via electron back-scattered diffraction, transmission Kikuchi diffraction and scanning transmission electron microscopy. From the tail of the gage to the necking region, the microstructure of the material evolved from low-angle grain boundaries (LAGBs) to mixtures of LAGBs and high-angle grain boundaries (HAGBs), and fine equiaxed recrystallized grains. The elongation to failure in the tensile test exceeds 167%. During the hot deformation, continuous dynamic recrystallization of the austenitic matrix was promoted by the multiple secondary phases. The dislocations introduced by the secondary phases were rearranged and continuously transformed into HAGBs. The initially coarse grains (30.5 mu m) were refined into ultra-fine equiaxed grains (1 mu m), which contributed significantly the enhanced plasticity during hot deformation of the steel. In the necking area of the sample, twins were nucleated in the stress concentration regions and accommodated the local strain by discontinuous dynamic recrystallization, which was also beneficial to improving the plasticity.
关键词	High-Si austenitic stainless steel High-temperature deformation Plasticity enhancement Dynamic recrystallization Secondary phases
DOI	10.1007/s40195-022-01388-5
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000757536400008
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173309
专题	中国科学院金属研究所
通讯作者	Liang, Tian; Liu, Kui
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 5.Fushun Special Steel Grp Co Ltd, Fushun Sub Ctr, Tech Ctr, Fushun 113001, Peoples R China
推荐引用方式 GB/T 7714	Chen, Sihan,Liang, Tian,Ma, Guangcai,et al. High-Temperature Plasticity Enhanced by Multiple Secondary Phases in a High-Si Austenitic Stainless Steel[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:12.
APA	Chen, Sihan.,Liang, Tian.,Ma, Guangcai.,Zheng, Chengwu.,Chen, Deli.,...&Liu, Kui.(2022).High-Temperature Plasticity Enhanced by Multiple Secondary Phases in a High-Si Austenitic Stainless Steel.ACTA METALLURGICA SINICA-ENGLISH LETTERS,12.
MLA	Chen, Sihan,et al."High-Temperature Plasticity Enhanced by Multiple Secondary Phases in a High-Si Austenitic Stainless Steel".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):12.