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The highest fatigue strength for steels

文献类型：期刊论文

作者Wang, Peng1,2; Xu, Zikuan1; Zhang, Peng1,2; Wang, Bin1; Liu, Xiaochun3; Zhu, Yankun1; Liu, Rui1; Liu, Yang1; Luan, Yikun1,2; Wang, Pei1,2
刊名ACTA MATERIALIA
出版日期2025-05-01
卷号289页码:10
关键词High-strength steel Fatigue strength Inclusion Rare-earth element Heat treatment
ISSN号1359-6454
DOI10.1016/j.actamat.2025.120888
通讯作者Zhang, Peng(pengzhang@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) ; Ritchie, Robert O.(roritchie@lbl.gov) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
英文摘要Improving the fatigue strength of engineering materials is the most important strategy to ensure the safety of key components. Regrettably, although a large number of high-strength materials have tensile strengths over 3 GPa, their fatigue strengths do not exceed 1 GPa under push-pull loading. Here, we report the highest fatigue strength for steels to date (of 1103 MPa) under push-pull loading with the stress ratio of R =-1 in a GCr15 bearing steel, achieved by precisely controlling the microstructure and defects. First, the plasticity of the inclusions is improved by adding minute rare-earth elements, which efficiently prevents their brittle fracture. Second, a new shearable inclusion/matrix interface structure is formed, further improving their collaborative deformation ability. Third, an excellent synergy between tensile strength and plasticity is achieved by adjusting heat treatment to reduce the fatigue cracking tendency at inclusions. These new findings provide insight into how the fatigue strength of highstrength steels can be improved, through microstructural adjustment and defect control. This strategy can be readily achieved with current industrial technologies and provides a promising and effective procedure to improve the fatigue properties of other high-strength metallic materials.
资助项目National Natural Science Foundation of China (NSFC)[52321001] ; National Natural Science Foundation of China (NSFC)[52001310] ; National Natural Science Foundation of China (NSFC)[52371123] ; National Natural Science Foundation of China (NSFC)[52130002] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC04040502] ; National Science and Technology Major Project[J2019-VI-0019-0134] ; Outstanding Postgraduate Innovative Research Project CAS[1193002090] ; KC Wong Education Foundation[GJTD-2020-09]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001441407600001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China (NSFC) ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; Outstanding Postgraduate Innovative Research Project CAS ; KC Wong Education Foundation
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Zhang, Peng; Li, Dianzhong; Ritchie, Robert O.; Zhang, Zhefeng
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Changsha Univ Sci & Technol, Inst Met, Coll Mat Sci & Engn, Changsha 410114, Peoples R China
4.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
推荐引用方式
GB/T 7714		 Wang, Peng,Xu, Zikuan,Zhang, Peng,et al. The highest fatigue strength for steels[J]. ACTA MATERIALIA,2025,289:10.
APA Wang, Peng.,Xu, Zikuan.,Zhang, Peng.,Wang, Bin.,Liu, Xiaochun.,...&Zhang, Zhefeng.(2025).The highest fatigue strength for steels.ACTA MATERIALIA,289,10.
MLA Wang, Peng,et al."The highest fatigue strength for steels".ACTA MATERIALIA 289(2025):10.

入库方式： OAI收割

来源：金属研究所

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