文献类型：期刊文献

英文题名：Submerged deflecting abrasive waterjet peening for improving the surface integrity and solid particle erosion resistance of Ti-6Al-4V alloy

作者：Song, Fei[1]; Yao, Shulei[1]; Liu, Liqiang[1]; Chi, Yuxin[1]; Shao, Zhihao[1]; Wang, Gongyu[1]; Jia, Yunfei[1]; Zhang, Xiancheng[1]; Tu, Shantung[1]

机构：[1] Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

卷号：470

外文期刊名：Surface and Coatings Technology

收录：EI(收录号：20233614681758)

语种：英文

外文关键词：Aircraft engines - Erosion - Hardening - Jets - Morphology - Residual stresses - Scanning electron microscopy - Surface morphology - Surface roughness - Surface treatment - Ternary alloys - Titanium alloys

摘要：Waterjet peening is a promising new surface treatment technology, which is increasingly used to improve a metal's surface integrity and mechanical properties. In this study, the surface integrity and solid particle erosion (SPE) resistance of Ti-6Al-4V alloy treated with submerged deflecting abrasive waterjet peening (SDA-WJP) at different standoff distances (D = 3, 6, and 9 mm) were investigated. First, the surface integrity of specimens before and after SDA-WJP treatment was compared, including microstructure, surface roughness, micromorphology, microhardness, and compressive residual stress (CRS). The test results showed that the SDA-WJP-treated specimens formed refined grain deformation layers of 8–24 μm and minimum roughness of Ra = 0.28 μm and Sa = 0.55 μm. The thicknesses of the refined grain hardening layer and CRS field were 140–180 and 120–200 μm, respectively. Finally, the SPE behavior and mechanism of the samples before and after SDA-WJP treatment were studied in the SPE test. The highest increase in SPE resistance was 51 % under different SDA-WJP processes. The microscopic morphology of the eroded surface was observed by scanning electron microscopy. The shallow embedding depth of the particles on the eroded surface after SDA-WJP treatment led to difficult platelet formation for removal. The introduced refined grain hardening layer and CRS field were critical in preventing micro-crack initiation and propagation. This work optimizes the SDA-WJP process parameters for improving the surface integrity and SPE resistance of Ti-6Al-4V alloy, thus providing a reference for the application of SDA-WJP for the improvement of the SPE resistance of aero-engine blades. ? 2023 Elsevier B.V.