Role of delta-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel

doi:10.1016/j.jmst.2021.10.008

IMR OpenIR

	Role of delta-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel
	Wang, Qiyu 1,2,3; Chen, Shenghu 1,3; Lv, Xinliang 1,2,3; Jiang, Haichang 1,3; Rong, Lijian 1,3
通讯作者	Chen, Shenghu(chensh@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
	2022-07-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	114 页码:7-15
摘要	FF sample (nearly free of delta-ferrite) and CF sample (containing similar to 4% delta-ferrite) were prepared from the AISI 316 austenitic stainless steel plate to elucidate the role of delta-ferrite in the fatigue crack growth under the solution treated and accelerated aged conditions. It is found that the fatigue crack growth resistance of the CF sample is higher than the FF sample under the solution treated condition. However, a significant deterioration of the fatigue crack growth resistance is observed in the CF sample while little variation is found in the FF sample after accelerated aging treatment at 750 degrees C for 10 h. In the solution treated condition, deflected crack growth path is present when the main crack encounters the delta-ferrite in the CF sample due to the differences in the fatigue responses between austenite and delta-ferrite. The measured growth rate of the deflected crack is significantly slower than that of the flat crack of the same length. After the accelerated aging treatment, microcracks are produced at the M23C6/delta interface due to the strain incompatibility between M(23)C(6 )and retained delta-ferrite when the decomposed delta-ferrite is subject to plastic deformation in the crack tip plastic zone. The preexisting microcracks in the front of crack tip provide a viable path for crack propagation, resulting in the relatively flat crack path. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Austenitic stainless steel delta-ferrite Accelerated aging Fatigue crack growth Crack deflection
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars
DOI	10.1016/j.jmst.2021.10.008
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51871218] ; Youth Innovation Promotion Association, CAS[2018227] ; LingChuang Research Project of China National Nuclear Corporation ; CNNC Science Fund for Talented Young Scholars
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000788132500002
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：26[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/321006/172594
专题	中国科学院金属研究所
通讯作者	Chen, Shenghu; Rong, Lijian
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qiyu,Chen, Shenghu,Lv, Xinliang,et al. Role of delta-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,114:7-15.
APA	Wang, Qiyu,Chen, Shenghu,Lv, Xinliang,Jiang, Haichang,&Rong, Lijian.(2022).Role of delta-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,114,7-15.
MLA	Wang, Qiyu,et al."Role of delta-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 114(2022):7-15.