文献类型：期刊文献

英文题名：Effect of machining on performance enhancement of superficial layer of high-strength alloy steel

作者：Jiang, Hongwan Ren, Zhongwei Yi, Yanliang He, Lin Yuan, Sen

第一作者：Jiang, Hongwan;蒋宏婉

通信作者：Jiang, HW[1];Ren, ZW[1];Jiang, HW[2]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;[2]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China;[3]Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China;[4]Guangdong Univ Technol, Sch Elect Engn, Guangzhou 510006, 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), Guangdong Univ Technol, Sch Elect Engn, Guangzhou 510006, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2021

卷号：14

起止页码：1065-1079

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20213010666234);Scopus(收录号：2-s2.0-85110747145);WOS:【SCI-EXPANDED(收录号:WOS:000704055300005)】；

基金：This work is financially supported by National Natural Science Foundation of China (Grant No. 52005118), Science and Technology Plan Project of Guizhou Province (Grant No. QKHJC [2020]1Y234) and High-level Talents Research Initiation Fund of Guizhou Institute of Technology (Grant No. 2019066).

语种：英文

外文关键词：High-strength alloy steel; Microstructure; Superficial layer; Gradient-distribution; Surface performance

摘要：The microstructure of machined superficial layer significantly affects the mechanical properties and service life of mechanical components. Herein, to obtain a machined sur -face with excellent properties, a comprehensive application of theoretical calculations and test analysis research methods was conducted to investigate the influence mechanism of machining on performance and quality of machined superficial layer of high-strength alloy steel during machining, and reveal the intrinsic correlation between microstructure evo-lution, quality and performance of machined superficial layer. The results indicate that the machining can achieve gradient microstructure on the machined surface, which can improve the performance of machined surface greatly. From the surface to the inside re-gion, the layers are respectively the recrystallized layer where compact nano-sized equi-axed grains are located, the rheological layer with clusters of high-density sub-grain structures, and the distorted layer with residual distorted grains. The maximum strain of superficial layer in the machined state is 2.81 times that of the original state. The grains are evidently refined and the grain size is reduced by 49.03%. The dislocation density is enhanced by 100.69%, while the number of small-angle grain boundaries (SAGB) and other substructures increase sharply, being 5.26 times that in the original state. By performance testing, the machining substantially enhances the hardness of the superficial layer of high-strength alloy steel with certain rise in toughness simultaneously, which is exactly the result of the combined effect of fine-grain strengthening and dislocation strengthening caused by the machining process above. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).