Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel

doi:10.11900/0412.1961.2017.00163

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel
	Chen Liansheng 1; Li Yue 1; Zhang Mingshan 1; Tian Yaqiang 1; Zheng Xiaoping 1; Xu Yong 1,2; Zhang Shihong 2
刊名	ACTA METALLURGICA SINICA
	2017-11-11
卷号	53 期号:11 页码:1418-1426
关键词	intercritical deformation dislocation multiplication vacancy partitioning bainite
ISSN号	0412-1961
DOI	10.11900/0412.1961.2017.00163
通讯作者	Tian Yaqiang(tyq@ncst.edu.cn)
英文摘要	The volume fraction and stabilization of retained austenite at room temperature were determined by the degree of stable element partitioning of austenite. The element diffusion behaviors usually had a close relationship with crystal defects, and dislocation multiplication caused by high temperature deformation might also increase the vacancy concentration, which contributed to the diffusion of substitutional atoms and interstitial atoms. By adopting a new treatment process of intercritical deformation-hold-quenching (DIQ), the effect of Mn partitioning and the structure evolution of bainite under the deformation in intercritical area were studied. The microstructure, dislocation density and distribution of alloy elements, especially the volume fraction of retained austenite, were characterized by means of OM, SEM, TEM, EPMA and XRD. The results indicated that the grains of ferrite and the lathes of martensite were refined, the number of the block martensite was decreased, and dislocation density was increased from 0.36x10(14) m(-2) to 1.20x10(14) m(-2) after deformation. The mutual movement of dislocation slip increased vacancy concentration and the number of interstitial solute atoms, accelerated the diffusive rate of C atoms and Mn atoms from alpha phase to gamma phase, and promoted the partitioning effect of Mn element in the critical region. Eventually, the contents and areas of C and Mn enrichment were increased. By adopting the process of intercritical deformation-hold-austenitizing-quenching-partitioning in bainitic region-quenching (DI&Q&PB), the volume fraction of retained austenite was increased from 11.5% to 13.9%, and the carbon content in retained austenite was increased from 1.14% to 1.28%.
资助项目	National Natural Science Foundation of China[51574107] ; Natural Science Foundation of Hebei Province[E2016209048] ; Natural Science Foundation of Hebei Province[E2017209048] ; Science and Technology Innovation Team of Tangshan City[15130202C] ; Postgraduate Innovation Program of Hebei Province[2017S01]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000416301500002
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Hebei Province ; Science and Technology Innovation Team of Tangshan City ; Postgraduate Innovation Program of Hebei Province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/125497]
专题	金属研究所_中国科学院金属研究所
通讯作者	Tian Yaqiang
作者单位	1.North China Univ Sci & Technol, Minist Educ Modern Met Technol, Key Lab, Tangshan 063210, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Chen Liansheng,Li Yue,Zhang Mingshan,et al. Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel[J]. ACTA METALLURGICA SINICA,2017,53(11):1418-1426.
APA	Chen Liansheng.,Li Yue.,Zhang Mingshan.,Tian Yaqiang.,Zheng Xiaoping.,...&Zhang Shihong.(2017).Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel.ACTA METALLURGICA SINICA,53(11),1418-1426.
MLA	Chen Liansheng,et al."Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel".ACTA METALLURGICA SINICA 53.11(2017):1418-1426.