Improvement of titanium alloy TA19 fatigue life by submerged abrasive waterjet peening: Correlation of its process parameters with surface integrity and fatigue performance

IF 5.3 1区工程技术 Q1 ENGINEERING, AEROSPACE

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI:10.1016/j.cja.2023.03.033

Gongyu WANG , Shulei YAO , Yuxin CHI , Chengcheng ZHANG , Ning WANG , Yalong CHEN , Rongsheng LU , Zhuang LI , Xiancheng ZHANG

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Abstract

Submerged abrasive waterjet peening (SAWJP) is an effective anti-fatigue manufacturing technology that is widely used to strengthen aeroengine components. This study investigated the correlation of SAWJP process parameters on surface integrity and fatigue life of titanium alloy TA19. SAWJP with different water pressures and standoff distances (SoDs) was conducted on the TA19 specimens. The surface integrity of the specimens before and after SAWJP with different process parameters was experimentally studied, including microstructure, surface roughness, microhardness, and compressive residual stress (CRS). Finally, fatigue tests of the specimens before and after SAWJP treatment with different process parameters were carried out at room temperature. The results highlighted that the fatigue life of the TA19 specimen can be increased by 5.46, 5.98, and 6.28 times under relatively optimal process parameters, which is mainly due to the improved surface integrity of the specimen after SAWJP treatment. However, the fatigue life of specimens treated with improper process parameters is decreased by 0.55 to 0.69 times owing to the terrible surface roughness caused by the material erosion. This work verifies that SAWJP can effectively improve the surface integrity and fatigue life of workpieces, and reveals the relationship between process parameters, surface integrity, and fatigue life, which provides support for the promotion of SAWJP in the manufacturing fields.

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水射流冲击提高钛合金TA19疲劳寿命——工艺参数与表面完整性和疲劳性能的相关性

浸没式加砂水刀强化（SAWJP）是一种有效的抗疲劳制造技术，被广泛用于强化航空发动机部件。本研究探讨了 SAWJP 工艺参数与钛合金 TA19 表面完整性和疲劳寿命的相关性。对 TA19 试样进行了不同水压和间距（SoDs）的 SAWJP。实验研究了采用不同工艺参数进行 SAWJP 前后试样的表面完整性，包括显微结构、表面粗糙度、显微硬度和压缩残余应力 (CRS)。最后，在室温下对采用不同工艺参数进行 SAWJP 处理前后的试样进行了疲劳试验。结果表明，在相对最佳的工艺参数下，TA19 试样的疲劳寿命分别提高了 5.46 倍、5.98 倍和 6.28 倍，这主要归功于 SAWJP 处理后试样表面完整性的改善。然而，在工艺参数不当的情况下，由于材料侵蚀造成的严重表面粗糙度，试样的疲劳寿命降低了 0.55 至 0.69 倍。这项工作验证了 SAWJP 能有效提高工件的表面完整性和疲劳寿命，并揭示了工艺参数、表面完整性和疲劳寿命之间的关系，为 SAWJP 在制造领域的推广提供了支持。

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来源期刊

Chinese Journal of Aeronautics 工程技术-工程：宇航

CiteScore

10.00

自引率

17.50%

发文量

3080

审稿时长

55 days

期刊介绍： Chinese Journal of Aeronautics (CJA) is an open access, peer-reviewed international journal covering all aspects of aerospace engineering. The Journal reports the scientific and technological achievements and frontiers in aeronautic engineering and astronautic engineering, in both theory and practice, such as theoretical research articles, experiment ones, research notes, comprehensive reviews, technological briefs and other reports on the latest developments and everything related to the fields of aeronautics and astronautics, as well as those ground equipment concerned.