文献类型：期刊文献

英文题名：Strengthening effect of laser peening on fatigue performance and life extension of laser cladded IN718 nickel-based alloy parts

作者：Wang, Yong[1];Huang, Shu[1];Sheng, Jie[1];Liu, Qiang[2];Zhu, Mingliang[3];Zhou, Sifan[1];Zhao, Chaojun[1];Liu, Jianjun[1];Lin, Youyu[4];Wu, Junwei[5]

机构：[1]Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China;[2]Jilin Univ, Key Lab CNC Equipment Reliabil, Minist Educ, Changchun 130025, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[4]Jiangsu SUMEC Hardware & Tools Co Ltd, Nanjing 210032, Jiangsu, Peoples R China;[5]Antiwear Suzhou Ind Intelligent Technol Co Ltd, Suzhou 215211, Jiangsu, Peoples R China

年份：2024

卷号：180

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20234915162564);WOS:【SCI-EXPANDED(收录号:WOS:001132425400001)】；

基金：The authors are grateful for the financial support from the National Natural Science Foundation of China (52375186, U21A20135), Jiangsu Natural Science Foundation (BK20221365), China Postdoctoral Science Foundation (2021M701501), Jiangsu Planned Projects for Postdoctoral Research Funds (2021K611C) and Opening Project of the Key Laboratory of CNC Equipment Reliability, Ministry of Education, Jilin University (JLU-cncr-202205), Jiangsu University Industrial Center Student Innovation and Practice Fund (ZXJG2022044), Jiangsu University Student Scientific Research Project Funding Project (21A169), Jiangsu University Industrial Center Student Innovation and Practice Fund (ZXJG2022042), Jiangsu University Student Scientific Research Project Funding Project (21A165).r Innovation and Practice Fund (ZXJG2022044) , Jiangsu University Stu-dent Scientific Research Project Funding Project (21A169) , Jiangsu University Industrial Center Student Innovation and Practice Fund (ZXJG2022042) , Jiangsu University Student Scientific Research Project Funding Project (21A165) .

语种：英文

外文关键词：Laser cladding; Laser peening; IN718 nickel-based alloy; Microstructure; Fatigue life

摘要：Strengthening effects of laser peening (LP) on fatigue life extension of IN718 nickel-based alloy parts repaired by laser cladding (LC) were investigated. Special attention was paid on the microhardness, residual stress, microstructures and fatigue performance. The results show that LP increases the microhardness and compressive residual stress of LCed samples and the induced severe plastic deformation closes the metallurgical defect. In addition, LP changes the microstructure of LCed parts, transforms a large number of columnar dendritic structures into cellular dendritic structures. The grains in the subsurface were refined and a high-density dislocation structure is produced as well. As a result, while compared with the matrix sample, the fatigue life of LPed sample with laser power density of 11.30 GW/cm2 is increased by 54.9 %. Finally, synergistic strengthening mechanism of LP on LCed IN718 nickel-based alloy parts through defective pore closure effect, high-amplitude residual stress, and microstructure evolution was revealed.