文献类型：期刊文献

英文题名：Investigation of residual stress formation mechanism with water jet strengthening of CoCrFeNiAlx high-entropy alloy

作者：Zhang, Ping[1];Gao, Yeran[1];Zhang, Songting[1];Yue, Xiujie[2,3];Wang, Shunxiang[1];Lin, Zhenyong[1]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China;[2]Qingdao Huanghai Univ, Coll Intelligent Mfg, Qingdao 266520, Peoples R China;[3]Qingdao Univ Technol, Coll Intelligent Mfg, Qingdao 266520, Peoples R China

年份：2023

卷号：217

外文期刊名：VACUUM

收录：SCI-EXPANDED(收录号：WOS:001062581000001)、、EI(收录号：20233414618361)、Scopus(收录号：2-s2.0-85168558205)、WOS

基金：The work was supported by the National Natural Science Foundation of China (51705270) , the National Natural Science Foundation of China (No.51575289) , the Natural Science Foundation of Guangdong Province (No.2023A1515030171) , Science and Technology Project of Zhanjiang City, Guangdong Province (No.2022A01004) , the Natural Science Foundation of Shandong Province (No.ZR2016EEP03) , the Applied Basic Research Program of Qingdao city (No.19-6-2-69-cg) and Shandong Qingchuang Science and Technology Project (No.2019KJB022) .

语种：英文

外文关键词：Water jet strengthening; High -entropy alloy; Surface roughness; Residual stress; Stress triaxiality

外文摘要：This study investigates the strengthening mechanism of water jet (WJ) on the high-entropy alloy CoCrFeNiAlx (x = 0, 0.6, 1). Finite element simulation analysis was conducted to examine the changes in residual stress, surface roughness, and stress triaxiality of high-entropy alloys under different jet velocities and Al contents. Subsequently, an experimental validation of surface roughness was performed using the Al-1 high-entropy alloy. The results reveal that the residual compressive stress and maximum residual compressive stress on the high-entropy alloy's surface increase with the jet velocity, irrespective of the Al content. However, the depth of the maximum residual compressive stress decreases as the Al content increases. At a jet velocity of 280 mm/s, the residual compressive stress on the surface of the Al-1 high-entropy alloy surpasses that of the Al-0.6 high-entropy alloy. Specifically, the residual compressive stress on the surface of the Al-1 high-entropy alloy is approximately 265 MPa, which is significantly higher than the value of 9 MPa for the Al-0.6 high-entropy alloy. When the jet velocity reaches 300 mm/s, the surface residual compressive stress of the high-entropy alloys shows a positive correlation with the Al content. The residual compressive stress on the surface of the Al-1 high-entropy alloy is about 1.89 times and 1.23 times that of the Al-0 and Al-0.6 high-entropy alloys, respectively. As the jet velocity continues to increase to 320 mm/s, the maximum residual compressive stress of the high-entropy alloys follows the order: Al-0.6 > Al-0 > Al-1. The maximum residual compressive stress of the Al-0.6 high-entropy alloy measures approximately 477 MPa, which is approximately 82 MPa higher than that of the Al-0 high-entropy alloy. Subsequently, at a jet velocity of 340 mm/s, the Al(0.6 )high-entropy alloy exhibits the highest maximum residual compressive stress, reaching a value of 650 MPa.Additionally, a negative correlation between surface roughness and jet velocity is observed. Moreover, an increase in Al content within the high-entropy alloys significantly reduces surface roughness under the same jet velocity impact.