Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels

doi:10.1016/j.jmrt.2022.02.043

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	Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels
	Duan, He 1,2; Shan, Yiyin 2; Yang, Ke 2; Shi, Xianbo 2; Yan, Wei 2
刊名	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2022-03-01
卷号	17 页码:3172-3185
关键词	Pipeline steel Crystallographic orientation Crack propagation Charpy impact toughness PF AF
ISSN号	2238-7854
DOI	10.1016/j.jmrt.2022.02.043
通讯作者	Shan, Yiyin(yyshan@imr.ac.cn) ; Yang, Ke(kyang@imr.ac.cn)
英文摘要	In order to elucidate the relationship among microstructure, crystallographic orientation characteristics and fracture behavior of pipeline steels at low temperature, three pipeline steels with different microstructures were fabricated by varying the cooling rate. Different characteristics of the three microstructures, such as high angle grain boundaries(HAGBs), crystallographic orientation and brittle fracture characteristics were investigated. The study showed that HAGBs had a considerable possibility to make the cracks deviate greatly from the original direction and were a decisive factor in determining the features of fracture and impact toughness. The AF(acicular ferrite) microstructures of steels C2 and C3 had the stronger arrestability to cracks because of their high density of HAGBs, which was reflected from more tortuous crack propagation paths and smaller cleavage fracture units on the fracture surface. In addition, the maximum content of {001} cleavage planes parallel to the fracture surface in steel C1 also led to the highest DBTT (ductile-brittle transition temperature). Compared with steel C2, steel C3 had more {100} cleavage planes parallel to the surface of the V-notch, resulting in larger and more secondary cracks which could significantly alleviate the stress concentration at the tip of the primary crack during impact test. Steel C3 also exhibited higher intensities around the {332}<113> components than steel C2. Therefore, the impact absorbed energy of steel C3 was higher than that of steel C2. Moreover, a modified equation can be used to quantitatively predict the DBTT of PF(po-lygonal ferrite), however, it can be only used for an approximate prediction for AF due to its complex microstructure. (c) 2022 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	National Key Research and Development Program of China[2017YFB0304901]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000779146700006
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172842]
专题	金属研究所_中国科学院金属研究所
通讯作者	Shan, Yiyin; Yang, Ke
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shichangxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Duan, He,Shan, Yiyin,Yang, Ke,et al. Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,17:3172-3185.
APA	Duan, He,Shan, Yiyin,Yang, Ke,Shi, Xianbo,&Yan, Wei.(2022).Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,17,3172-3185.
MLA	Duan, He,et al."Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 17(2022):3172-3185.