Effect of boron addition on the microstructure and cryogenic mechanical properties of N50 stainless steel after aging treatment

doi:10.1016/j.msea.2023.145372

IMR OpenIR

	Effect of boron addition on the microstructure and cryogenic mechanical properties of N50 stainless steel after aging treatment
	Zhai, Ruzong 1,2,3; Zhang, Honglin 1,3; Pan, Shilong 1,4; Xu, Bin 1,3; Liu, Sheng 1,2,3; Sun, Mingyue 1,3
通讯作者	Xu, Bin(bxu@imr.ac.cn)
	2023-08-10
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	881 页码:13
摘要	The effect of boron on the microstructure and cryogenic mechanical properties in N50 austenitic stainless steel after aging treatment was revealed by a comparative investigation of 0B and 25B (25 ppm) N50 steels. The results showed there is a large amount of irregular block and rod-like Cr2N precipitated along grain boundaries with intra-granular precipitation of lamellar Cr2N in 0B steel; nevertheless, the nucleation and growth of Cr2N were significantly suppressed in 25B steel. It is related to the retarded diffusion of Cr, Mo, and V atoms caused by the pre-occupied B atoms during the precipitation of nitride. Theoretical calculations verify that the high B segregation at grain boundaries is caused by both equilibrium and non-equilibrium segregation. The weakened precipitation of nitride and the enhanced cohesion of grain boundaries by segregated B synergistically suppress the initiation and extension of intergranular cracks. The impact toughness of 25B-N50 steel at both 77 K and 4.2 K can reach 200 J, which is about 2.5 times higher than that of 0B-N50 steel.
关键词	N50 austenitic stainless steel B addition Grain boundary segregation First-principles calculations Cryogenic mechanical properties
资助者	National Key Research and Development Program ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; IMR Innovation Foundation ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars and Youth Innovation Promotion Association ; CAS
DOI	10.1016/j.msea.2023.145372
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program[2018YFA0702900] ; Key Program of the Chinese Academy of Sciences[ZDRWCN2021-2-4-2] ; National Natural Science Foundation of China[52173305] ; National Natural Science Foundation of China[52101061] ; National Natural Science Foundation of China[52233017] ; National Natural Science Foundation of China[52203384] ; IMR Innovation Foundation[2022-PY12] ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars and Youth Innovation Promotion Association ; CAS
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001058298700001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：7[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/321006/179096
专题	中国科学院金属研究所
通讯作者	Xu, Bin
作者单位	1.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 230026, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Zhai, Ruzong,Zhang, Honglin,Pan, Shilong,et al. Effect of boron addition on the microstructure and cryogenic mechanical properties of N50 stainless steel after aging treatment[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,881:13.
APA	Zhai, Ruzong,Zhang, Honglin,Pan, Shilong,Xu, Bin,Liu, Sheng,&Sun, Mingyue.(2023).Effect of boron addition on the microstructure and cryogenic mechanical properties of N50 stainless steel after aging treatment.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,881,13.
MLA	Zhai, Ruzong,et al."Effect of boron addition on the microstructure and cryogenic mechanical properties of N50 stainless steel after aging treatment".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 881(2023):13.