文献类型：期刊文献

英文题名：Inconel 718 alloy strengthening mechanism and fatigue life of microtexture-induced microjet coupled with cavifying water jet

作者：Zhang, Ping[1,2];Gao, Yeran[1];Zhang, Jinlong[1];Yue, Xiujie[2,3];Zhou, Hanping[1];Sun, Yajie[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：2024

卷号：222

外文期刊名：VACUUM

收录：SCI-EXPANDED(收录号：WOS:001199799000001)、、EI(收录号：20240915650489)、Scopus(收录号：2-s2.0-85185884078)、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) , Research start-up fund of Guangdong Ocean University.

语种：英文

外文关键词：Waterjet strengthening; Stress strengthening mechanism; Fatigue performance; Residual stress; Inconel 718

外文摘要：This research investigates how waterjet treatments enhance the durability of pre-textured Inconel 718 alloy surfaces and their subsequent impact on fatigue life. By harnessing the microjet effects created by the fluid jet process on the microtextured surfaces, the study uses finite element and fatigue analysis models developed in ABAQUS and Fe-safe to examine residual stresses and surface roughness post-treatment. The study confirmed through experiments that waterjet processing significantly boosts the alloy's resistance to fatigue by generating substantial compressive stresses on the surface. The highest compressive stress was achieved with high-density waterjets (WJ-Hd), followed by low-density (WJ-Ld) and standard waterjets (WJ), with WJ-Hd generating stress levels more than double that of WJ and nearly 40% higher than WJ-Ld. The surface roughness was found to increase with jet velocity, affecting the central and edge areas of the sample differently depending on the waterjet type. In fatigue tests, the order of performance from highest to lowest was WJ-Hd, WJ-Ld, WJ, and untreated samples. High-density waterjets extended the fatigue life considerably by preventing crack formation and growth, suggesting that such treatments could significantly improve the endurance and integrity of Inconel 718 alloy surfaces. This study contributes new understanding to the field of waterjet strengthening for Inconel 718 alloys with pre-fabricated microtextures.