High-Temperature Deformation Behavior of M50 Steel

doi:10.3390/met12040541

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	High-Temperature Deformation Behavior of M50 Steel
	Chen, Guoxin 2,3; Lu, Xingyu 1; Yan, Jin 3; Liu, Hongwei 2; Sang, Baoguang 3
刊名	METALS
	2022-04-01
卷号	12 期号:4 页码:16
关键词	M50 steel constitutive equation processing map dynamic recrystallization microstructure
DOI	10.3390/met12040541
通讯作者	Liu, Hongwei(hwliu@imr.ac.cn) ; Sang, Baoguang(bgsang@163.com)
英文摘要	The hot deformation characteristics of M50 steel in the temperature range of 900-1150 degrees C and strain-rate range of 0.01-10 s(-1) was investigated in this study using a Gleeble-3800 thermal simulation testing machine. The true stress-strain curves showed that the deformation resistance increased with decreasing deformation temperature, and increasing strain rate before the peak stress was reached. After the peak stress, dynamic reversion occurred, and consequently, the deformation stress decreased. The softening phenomenon was more obvious when the strain rate was low. The calculated values of the thermal deformation-activation energy Q and stress index n were 233,684.2 J/mol and 5.025568, respectively. On this basis, the Arrhenius-type constitutive equation was established, and in addition, a polynomial fit based on strain was performed to obtain the 9th-order strain-compensated constitutive equation with high fitting accuracy. By processing the flow stress curves, the processing maps of M50 steel were constructed, and the optimal processing range was predicted to be in the range of 1070-1150 degrees C and 0.01-1 s(-1). The recrystallization behavior of M50 steel was also studied by constructing a dynamic recrystallization kinetic model and combining optical microscope (OM) and electron backscatter diffraction (EBSD) observation. The results show that with the increase of deformation temperature, the degree of recrystallization transformation increased accordingly, and the original grains were gradually replaced by recrystallized grains. Besides, in the optimal process zone for thermal processing, the recrystallized grains grew with decreasing strain rate and increasing temperature.
资助项目	Key-Area Research and Development Program of Guangdong Province of China[2020B010184001] ; Natural Science Foundation of China[52031013]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000786101800001
资助机构	Key-Area Research and Development Program of Guangdong Province of China ; Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172839]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Hongwei; Sang, Baoguang
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Dalian Polytech Univ, Sch Mech Engn & Automat, Dalian 116034, Peoples R China
推荐引用方式 GB/T 7714	Chen, Guoxin,Lu, Xingyu,Yan, Jin,et al. High-Temperature Deformation Behavior of M50 Steel[J]. METALS,2022,12(4):16.
APA	Chen, Guoxin,Lu, Xingyu,Yan, Jin,Liu, Hongwei,&Sang, Baoguang.(2022).High-Temperature Deformation Behavior of M50 Steel.METALS,12(4),16.
MLA	Chen, Guoxin,et al."High-Temperature Deformation Behavior of M50 Steel".METALS 12.4(2022):16.