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The tempering behavior of martensite/austenite islands on the mechanical properties of a low alloy Mn-Ni-Mo steel with granular bainite
Jiang, Zhonghua; Li, Yonghan; Yang, Zhendan; Wang, Pei; Li, Dianzhong; Li, Yiyi
Corresponding AuthorJiang, Zhonghua(zhjiang12s@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
2021-03-01
Source PublicationMATERIALS TODAY COMMUNICATIONS
ISSN2352-4928
Volume26Pages:9
AbstractThe effects of tempering on the microstructure and mechanical properties of a low alloy Mn-Ni-Mo steel were investigated. The results indicate that the steel is characterized by granular bainite consisting of bainitic ferrite, blocky islands of martensite and/or austenite (M-A islands) and film-type retained austenite (AR) before tempering. The volume fraction of AR decreases with an increase in the tempering temperature: slowly before 280 degrees C, rapidly at 350 degrees C, and approaching zero at 450 degrees C. When tempered at 280 degrees C, the steel has optimum mechanical properties because of the internal stress relaxation and the decomposition of blocky M-A islands, especially twinned martensite islands. Additionally, the enhancement of AR stability is to some extent responsible for improving the impact toughness. When tempered at 350-450 degrees C, tempering brittleness occurs, which results from the decomposition of the AR films into discrete flake-type carbides along the interfaces. Further increase in the tempering temperature results in high toughness and low strength of the steel, mainly due to the recovery and recrystallization of bainitic ferrite, and the precipitation of globular M3C carbides.
KeywordGranular bainite Tempering M-A islands Impact toughness Retained austenite
Funding OrganizationLiaoning Province Doctoral Research Initiation Fund ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
DOI10.1016/j.mtcomm.2021.102166
Indexed BySCI
Language英语
Funding ProjectLiaoning Province Doctoral Research Initiation Fund[2020-BS-010] ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences[L2019F48]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000634314700007
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162106
Collection中国科学院金属研究所
Corresponding AuthorJiang, Zhonghua; Li, Dianzhong
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Zhonghua,Li, Yonghan,Yang, Zhendan,et al. The tempering behavior of martensite/austenite islands on the mechanical properties of a low alloy Mn-Ni-Mo steel with granular bainite[J]. MATERIALS TODAY COMMUNICATIONS,2021,26:9.
APA Jiang, Zhonghua,Li, Yonghan,Yang, Zhendan,Wang, Pei,Li, Dianzhong,&Li, Yiyi.(2021).The tempering behavior of martensite/austenite islands on the mechanical properties of a low alloy Mn-Ni-Mo steel with granular bainite.MATERIALS TODAY COMMUNICATIONS,26,9.
MLA Jiang, Zhonghua,et al."The tempering behavior of martensite/austenite islands on the mechanical properties of a low alloy Mn-Ni-Mo steel with granular bainite".MATERIALS TODAY COMMUNICATIONS 26(2021):9.
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