Effects of Microstructure on CVN Impact Toughness in Thermomechanically Processed High Strength Microalloyed Steel

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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
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	48A 期号:2 页码:685-696
摘要	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.; 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.
部门归属	[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
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China [51204048]; Fundamental Research Funds for the Central Universities [N120407008]
收录类别	SCI
语种	英语
WOS记录号	WOS:000392294000016
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78323
专题	中国科学院金属研究所
通讯作者	Jia, T (reprint author), Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China.
推荐引用方式 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.