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research-article

Experimental and Numerical Analysis of Water jet Peening on 6061 Aluminum Alloy

[+] Author and Article Information
Zhanshu He

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
hezhanshu@qq.com

Shusen Zhao

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
zsscn1994@163.com

Ting Fu

Key Laboratory of Metallurgical Equipment and Control Technology, Wuhan University of Science and Technology, Wuhan 430080, China
futing1234gh@wust.edu.cn

Lei Chen

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
327057454@qq.com

Yuanxi Zhang

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
863831667@qq.com

Meng Zhang

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
479514218@qq.com

Peizhuo Wang

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
353529369@qq.com

1Corresponding author.

ASME doi:10.1115/1.4039071 History: Received September 16, 2017; Revised December 24, 2017

Abstract

Water jet peening (WJP) is a mechanical surface strengthening process which can improve the residual stress of the peened surface and then improve the fatigue life of components. In this paper, the erosion experiments are conducted to investigate the influence of peening parameters on erosion. On this basis, residual stresses (RS) induced by WJP are studied in relation to the peening parameters. In addition, the CEL (Coupled Eulerian-Lagrangian) technique is used to model and simulate the dynamic impact process of WJP on Al6061-T6. Parameters that influence the performance of WJP including jet pressure p, jet traverse velocity vf , and the number of water jet pass n on the modifica-tion of residual stress field (RSF) are examined by simulation and experiment. The influences of incidence angle ? and water jet diameter d on RSF are also investigated by simulation. Results show that compressive RS ?crs is a result of the action of water-hammer pressure alone. Furthermore, ?crs increases with an increase in p, n anda. The optimal peening parameters for Al6061-T6 are found to be p= 60MPa, vf =2000mm/min, n =4, a =90deg and d=2.0mm. Finally, the depth of compressive RS layer D0 increases greatly with an increase in water jet diameter d and can reaches 984um.

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