Dual-gradient structure enhances wear resistance of aero-engine bearing steel by suppressing strain localization
文献类型：期刊论文
| 作者 | Guo, Qianwei1,2; Liu, Hanghang1; Sun, Chen1; Cao, Yanfei1; Lu, Xingyu1; Du, Yinuo1,2; Ru, Xinyu1; Xu, Haitao1,2; Song, Kaiyan1; Fu, Paixian1 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2025-05-01 |
| 卷号 | 289页码:15 |
| 关键词 | Dual-gradient structure Wear resistance Strain delocalization Bearing steel |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2025.120919 |
| 通讯作者 | Liu, Hanghang(hhliu15b@imr.ac.cn) ; Fu, Paixian(pxfu@imr.ac.cn) |
| 英文摘要 | Gradient structures can significantly enhance the wear resistance of steels through the synergistic effects of heterogeneity. However, traditional surface heterostructures typically produce a single gradient. Here, we propose a novel strategy to implement a dual-gradient structure of composition and nanocrystalline, thereby enhancing the wear resistance of bearing steel by suppressing strain localization. The compositional gradient prefabricated by carburization facilitates the formation of gradient-distributed carbides and martensite, while the nanocrystalline gradient is developed further via ultrasonic shot peening. Strong dislocation movement promotes the refinement and decomposition of large-sized irregular carbides in the surface layer, significantly mitigating the initiation and propagation of cracks induced by stress localization. Additionally, the numerous nanograins in the surface layer not only contribute to the formation of a more stable and dense oxide film under oil lubrication but also create a more dispersed region of stress localization by co-sharing cyclic shear stress, thereby alleviating sliding-induced microstructural instability. Furthermore, the single compositional gradient structure tends to surface strain localization during loading, attributable to the relatively gradual transition between the hard and soft layers, whereas the dual-gradient structure facilitates surface strain delocalization across a wider stress range due to the presence of numerous nanograins creating a more pronounced strain gradient. Compared to the single compositional gradient, the unique dual-gradient structure reduces the wear rate by 52.5 % and 53.9 % at low and high-frequency sliding, respectively. This work proposes a promising design for the fabrication of dualgradient structures to enhance the wear resistance in high-strength steels. |
| 资助项目 | National Natural Science Foundation of China[52321001] ; Liaoning Provincial Natural Science Foundation Program (Faceted Projects)[2024-MSBA-70] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001448087400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation Program (Faceted Projects) |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, Hanghang; Fu, Paixian |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Qianwei,Liu, Hanghang,Sun, Chen,et al. Dual-gradient structure enhances wear resistance of aero-engine bearing steel by suppressing strain localization[J]. ACTA MATERIALIA,2025,289:15. |
| APA | Guo, Qianwei.,Liu, Hanghang.,Sun, Chen.,Cao, Yanfei.,Lu, Xingyu.,...&Li, Dianzhong.(2025).Dual-gradient structure enhances wear resistance of aero-engine bearing steel by suppressing strain localization.ACTA MATERIALIA,289,15. |
| MLA | Guo, Qianwei,et al."Dual-gradient structure enhances wear resistance of aero-engine bearing steel by suppressing strain localization".ACTA MATERIALIA 289(2025):15. |
入库方式： OAI收割
来源：金属研究所
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