Microstructure evolution and yield strength improvement of a low carbon medium manganese steel experienced intercritical annealing, pre-straining and tempering

doi:10.1016/j.matchar.2022.112439

	Microstructure evolution and yield strength improvement of a low carbon medium manganese steel experienced intercritical annealing, pre-straining and tempering
	Bi, Nannan 1,3; Liang, Juhua 3; Wang, Xingfu 3; Kang, Tao 2,4; Han, Fusheng 3
刊名	MATERIALS CHARACTERIZATION
	2022-12-01
卷号	194
关键词	Medium manganese steel Intercritical annealing Pre -strain Microstructure evolution Mechanical property
ISSN号	1044-5803
DOI	10.1016/j.matchar.2022.112439
通讯作者	Liang, Juhua(liangjuhua0721@126.com) ; Han, Fusheng(fshan@issp.ac.cn)
英文摘要	The microstructure evolution and mechanical properties of a 0.15C1.2Si10Mn0.5 V medium manganese steel after intercritical annealing, pre-straining and tempering treatment are systematically analyzed. An intercritical annealing yields a microstructure containing ultrafine gamma + alpha coexisting structure while final tempering reduces martensitic supersaturation, which is beneficial to the ductility of the steel. The applied pre-strains between the two processes cause a part of unstable banded austenite in hot rolled state prematurely to transform into lath martensite that divides the coarse banded austenite into smaller ones. When the pre-strain is 0.02, there are about 21% strain-induced martensite produced in the microstructure and the steel exhibits the best comprehensive mechanical properties with the yield strength of 1264 MPa, tensile strength of 1506 MPa and total elongation of 19%. Actually, the increase in yield strength under pre-strains should be ascribed to dislocation strengthening in the strain-induced martensite and the precipitation strengthening of vanadium carbides during the deformation and subsequent tempering.
资助项目	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province of China ; Science and Technology Program of Inner Mongolia Autonomous Region ; [52001304] ; [2008085QE259] ; [2108085ME142] ; [2022YFDZ0004]
WOS关键词	MECHANICAL-PROPERTIES ; RETAINED AUSTENITE ; TENSILE BEHAVIOR ; MARTENSITE ; PRECIPITATION ; DUCTILITY ; TEMPERATURE ; STABILITY ; TOUGHNESS ; MODEL
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:000882077600003
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province of China ; Science and Technology Program of Inner Mongolia Autonomous Region
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130355]
专题	中国科学院合肥物质科学研究院
通讯作者	Liang, Juhua; Han, Fusheng
作者单位	1.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 2.China North Vehicle Res Inst, Beijing 100072, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China 4.Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Bi, Nannan,Liang, Juhua,Wang, Xingfu,et al. Microstructure evolution and yield strength improvement of a low carbon medium manganese steel experienced intercritical annealing, pre-straining and tempering[J]. MATERIALS CHARACTERIZATION,2022,194.
APA	Bi, Nannan,Liang, Juhua,Wang, Xingfu,Kang, Tao,&Han, Fusheng.(2022).Microstructure evolution and yield strength improvement of a low carbon medium manganese steel experienced intercritical annealing, pre-straining and tempering.MATERIALS CHARACTERIZATION,194.
MLA	Bi, Nannan,et al."Microstructure evolution and yield strength improvement of a low carbon medium manganese steel experienced intercritical annealing, pre-straining and tempering".MATERIALS CHARACTERIZATION 194(2022).