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The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel
Sun, Chen1,2; Fu, Paixian1; Liu, Hongwei1; Liu, Hanghang1; Du, Ningyu1,2; Cao, Yanfei1
Corresponding AuthorFu, Paixian(pxfu@imr.ac.cn) ; Cao, Yanfei(yfcao10s@imr.ac.cn)
2020-03-01
Source PublicationCRYSTALS
ISSN2073-4352
Volume10Issue:3Pages:12
AbstractDifferent austenitizing temperatures were used to obtain medium-carbon low-alloy (MCLA) martensitic steels with different lath martensite microstructures. The hierarchical microstructures of lath martensite were investigated by optical microscopy (OM), electron backscattering diffraction (EBSD), and transmission electron microscopy (TEM). The results show that with increasing the austenitizing temperature, the prior austenite grain size and block size increased, while the lath width decreased. Further, the yield strength and tensile strength increased due to the enhancement of the grain boundary strengthening. The fitting results reveal that only the relationship between lath width and strength followed the Hall-Petch formula of. Hence, we propose that lath width acts as the effective grain size (EGS) of strength in MCLA steel. In addition, the carbon content had a significant effect on the EGS of martensitic strength. In steels with lower carbon content, block size acted as the EGS, while, in steels with higher carbon content, the EGS changed to lath width. The effect of the Cottrell atmosphere around boundaries may be responsible for this change.
Keywordmedium-carbon low-alloy steel lath martensite effective grain size strength carbon content
Funding OrganizationNational Natural Science Foundation of China ; Project to Strengthen Industrial Development at the Grass-roots Level ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the cutting-edge basic research and key technology by SYNL ; Young Talent Project by SYNL ; China Postdoctoral Science Foundation
DOI10.3390/cryst10030232
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51701225] ; Project to Strengthen Industrial Development at the Grass-roots Level[TC190A4DA/35] ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the cutting-edge basic research and key technology by SYNL[L2019R36] ; Young Talent Project by SYNL[L2019F33] ; China Postdoctoral Science Foundation[2019M661153]
WOS Research AreaCrystallography ; Materials Science
WOS SubjectCrystallography ; Materials Science, Multidisciplinary
WOS IDWOS:000523512100031
PublisherMDPI
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137942
Collection中国科学院金属研究所
Corresponding AuthorFu, Paixian; Cao, Yanfei
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Sun, Chen,Fu, Paixian,Liu, Hongwei,et al. The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel[J]. CRYSTALS,2020,10(3):12.
APA Sun, Chen,Fu, Paixian,Liu, Hongwei,Liu, Hanghang,Du, Ningyu,&Cao, Yanfei.(2020).The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel.CRYSTALS,10(3),12.
MLA Sun, Chen,et al."The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel".CRYSTALS 10.3(2020):12.
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