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Effect of Intercritical Dislocation Multiplication to Mn Partitioning and Microstructure Evolution of Bainite in Low Carbon Steel
Chen Liansheng1; Li Yue1; Zhang Mingshan1; Tian Yaqiang1; Zheng Xiaoping1; Xu Yong1,2; Zhang Shihong2
Corresponding AuthorTian Yaqiang(tyq@ncst.edu.cn)
2017-11-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume53Issue:11Pages:1418-1426
AbstractThe 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%.
Keywordintercritical deformation dislocation multiplication vacancy partitioning bainite
Funding OrganizationNational 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
DOI10.11900/0412.1961.2017.00163
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000416301500002
PublisherSCIENCE PRESS
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/125498
Collection中国科学院金属研究所
Corresponding AuthorTian Yaqiang
Affiliation1.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
Recommended Citation
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.
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