High-Temperature Deformation Behavior of M50 Steel
Chen, Guoxin1,2; Lu, Xingyu3; Yan, Jin2; Liu, Hongwei1; Sang, Baoguang2
Corresponding AuthorLiu, Hongwei( ; Sang, Baoguang(
Source PublicationMETALS
AbstractThe 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.
KeywordM50 steel constitutive equation processing map dynamic recrystallization microstructure
Funding OrganizationKey-Area Research and Development Program of Guangdong Province of China ; Natural Science Foundation of China
Indexed BySCI
Funding ProjectKey-Area Research and Development Program of Guangdong Province of China[2020B010184001] ; Natural Science Foundation of China[52031013]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000786101800001
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu, Hongwei; Sang, Baoguang
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Dalian Polytech Univ, Sch Mech Engn & Automat, Dalian 116034, Peoples R China
3.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
Recommended Citation
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.
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