文献类型：期刊文献

英文题名：Design and analysis of machined shallow surface of high-strength alloy steel: From microstructure, performance to strengthening mechanism

作者：Jiang, Hongwan Ren, Zhongwei Chen, Yang Yi, Yanliang Deng, Wendi Long, Shaolei Yuan, Sen

第一作者：Jiang, Hongwan;蒋宏婉

通信作者：Ren, ZW[1];Yi, YL[2]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;[2]Jinan Univ, Coll Chem & Mat Sci, Guangzhou 510632, Peoples R China;[3]Guizhou Univ, Key Lab Adv Mfg Technol, Minist Educ, Guiyang 550025, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;corresponding author), Jinan Univ, Coll Chem & Mat Sci, Guangzhou 510632, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2025

卷号：259

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20254119302582);Scopus(收录号：2-s2.0-105018096247);WOS:【SCI-EXPANDED(收录号:WOS:001595378100005)】；

基金：The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (Grant No.52265055, 52005118) . This work has also supported by grants from the Science and Technology Plan Project of Guizhou Province (Grant No. QKHJC-ZK [2022] ZD026) , Innovative Talents at the "Hundred" Level of Guizhou Province (Grant No. QKHPTRC-GCC [2023] 054) , the Science and

语种：英文

外文关键词：Difficult-to-cut alloy steel; Shallow layer; Gradient microstructure; Mechanical property

摘要：As a critical determinant of service performance, the gradient microstructure of processed surfaces governs both mechanical strength and fatigue resistance in high-strength alloys. To design and achieve superior processed surfaces, a combined method of theoretical calculations and experimental analysis was utilized to investigate the influence mechanism of machining on the performance and quality of the machined shallow layer in high-strength alloy steel (HSAS) in this study, aiming to reveal the intrinsic correlation between microstructure evolution, surface quality, and mechanical performance. The results demonstrate that machining can generate a gradient microstructure in the processed surface, which significantly enhances the surface's performance. Quantitative analysis revealed a 33.35% reduction in grain size, a 114.98% surge in crystallographic defects and a 57.26 % decrease in lath dimensions, indicating severe grain refinement. The machining process induces considerable disturbances and randomization in crystal orientation, leading to uniform crystal orientation across the surface layer of the workpiece. Performance testing demonstrates that machining substantially improves the nano-hardness of the surface layer in HSAS, while also resulting in a modest enhancement of toughness. These improvements are attributed to the combined effects of fine-grain strengthening, grain-boundary strengthening, and dislocation strengthening, all of which are induced by the processing process described above.