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Effects of Microstructure on CVN Impact Toughness in Thermomechanically Processed High Strength Microalloyed Steel
Jia, Tao; Zhou, Yanlei; Jia, Xiaoxiao; Wang, Zhaodong; Jia, T (reprint author), Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China.
2017-02-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume48AIssue:2Pages:685-696
AbstractInvestigation on the correlation between microstructure and CVN impact toughness is of practical importance for the microstructure design of high strength microalloyed steels. In this work, three steels with characteristic microstructures were produced by cooling path control, i.e., steel A with granular bainite (GB), steel B with polygonal ferrite (PF) and martensite-austenite (M-A) constituent, and steel C with the mixture of bainitic ferrite (BF), acicular ferrite (AF), and M-A constituent. Under the same alloy composition and controlled rolling, similar ductile-to-brittle transition temperatures were obtained for the three steels. Steel A achieved the highest upper shelf energy (USE), while large variation of impact absorbed energy has been observed in the ductile-to-brittle transition region. With apparently large-sized PF and M-A constituent, steel B shows the lowest USE and delamination phenomenon in the ductile-to-brittle transition region. Steel C exhibits an extended upper shelf region, intermediate USE, and the fastest decrease of impact absorbed energy in the ductile-to-brittle transition region. The detailed CVN impact behavior is studied and then linked to the microstructural features.; Investigation on the correlation between microstructure and CVN impact toughness is of practical importance for the microstructure design of high strength microalloyed steels. In this work, three steels with characteristic microstructures were produced by cooling path control, i.e., steel A with granular bainite (GB), steel B with polygonal ferrite (PF) and martensite-austenite (M-A) constituent, and steel C with the mixture of bainitic ferrite (BF), acicular ferrite (AF), and M-A constituent. Under the same alloy composition and controlled rolling, similar ductile-to-brittle transition temperatures were obtained for the three steels. Steel A achieved the highest upper shelf energy (USE), while large variation of impact absorbed energy has been observed in the ductile-to-brittle transition region. With apparently large-sized PF and M-A constituent, steel B shows the lowest USE and delamination phenomenon in the ductile-to-brittle transition region. Steel C exhibits an extended upper shelf region, intermediate USE, and the fastest decrease of impact absorbed energy in the ductile-to-brittle transition region. The detailed CVN impact behavior is studied and then linked to the microstructural features.
description.department[jia, tao ; wang, zhaodong] northeastern univ, state key lab rolling & automat, 3-11 wenhua rd, shenyang 110819, peoples r china ; [zhou, yanlei] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [jia, xiaoxiao] univ manchester, adv engn mat, oxford rd, manchester m13 9pl, lancs, england
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51204048]; Fundamental Research Funds for the Central Universities [N120407008]
Indexed BySCI
Language英语
WOS IDWOS:000392294000016
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78323
Collection中国科学院金属研究所
Corresponding AuthorJia, T (reprint author), Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China.
Recommended Citation
GB/T 7714
Jia, Tao,Zhou, Yanlei,Jia, Xiaoxiao,et al. Effects of Microstructure on CVN Impact Toughness in Thermomechanically Processed High Strength Microalloyed Steel[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2017,48A(2):685-696.
APA Jia, Tao,Zhou, Yanlei,Jia, Xiaoxiao,Wang, Zhaodong,&Jia, T .(2017).Effects of Microstructure on CVN Impact Toughness in Thermomechanically Processed High Strength Microalloyed Steel.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,48A(2),685-696.
MLA Jia, Tao,et al."Effects of Microstructure on CVN Impact Toughness in Thermomechanically Processed High Strength Microalloyed Steel".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 48A.2(2017):685-696.
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