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

IMR OpenIR

	Effect of microstructure and crystallographic orientation characteristics on low temperature toughness and fracture behavior of pipeline steels
	Duan, He 1,2; Shan, Yiyin 1; Yang, Ke 1; Shi, Xianbo 1; Yan, Wei 1
通讯作者	Shan, Yiyin(yyshan@imr.ac.cn) ; Yang, Ke(kyang@imr.ac.cn)
	2022-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	17 页码:3172-3185
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/).
关键词	Pipeline steel Crystallographic orientation Crack propagation Charpy impact toughness PF AF
资助者	National Key Research and Development Program of China
DOI	10.1016/j.jmrt.2022.02.043
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFB0304901]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000779146700006
出版者	ELSEVIER
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/321006/172843
专题	中国科学院金属研究所
通讯作者	Shan, Yiyin; Yang, Ke
作者单位	1.Chinese Acad Sci, Shichangxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 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.