Process Parameters Optimization of Refill Friction Stir Spot Welded Al/Cu Joint by Response Surface Method
- PDF / 2,211,353 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 14 Downloads / 212 Views
ORIGINAL ARTICLE
Process Parameters Optimization of Refill Friction Stir Spot Welded Al/Cu Joint by Response Surface Method Yingying Zuo1 • Lingpei Kong1 • Zhenlei Liu1 • Zan Lv1 • Hongji Wen1
Received: 4 April 2020 / Accepted: 28 September 2020 Ó The Indian Institute of Metals - IIM 2020
Abstract Refill friction stir spot welding is a new branch of friction stir welding. In this study, the dissimilar Al/Cu joint was acquired by refill friction stir spot welding. A quadratic regression model was established by Box– Behnken design to explore the relationships between the key process parameters of rotational velocity, plunge depth and welding time and the joint tensile shear load. The results show that the rotational velocity is the most dominant factor for tensile shear load, while the welding time and plunge depth are the second and third effective process parameters. The contour map and response surface present that tensile shear load first increases and then decreases with the increase of the investigated process parameters. The maximum tensile shear load of 4.69 kN is acquired at the optimized rotational velocity of 2500 rpm, plunge depth of 1.7 mm and welding time of 6.2 s. Keywords Refill friction stir spot welding Dissimilar Al/Cu joint Box–Behnken design Tensile shear load
Yingying Zuo and Lingpei Kong have contributed equally to this work. & Zhenlei Liu [email protected] & Zan Lv [email protected] 1
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, People’s Republic of China
1 Introduction The dissimilar Al/Cu joint can combine the excellent properties of aluminum (Al) and copper (Cu), which contributes to reducing structure weight and saving resources [1]. In recent years, the joining of Al/Cu dissimilar metals has become a research hotspot. Friction stir spot welding (FSSW) is a solid-state welding technique, which is suitable for lapped joint configuration [2, 3] and has been applied to weld dissimilar Al/Cu joint. The welding process parameters are crucial for joint quality because they directly influence the heat input and material flow [4, 5]. Hence, numerous investigations on the welding process parameters optimization of Al/Cu FSSW are performed. Factorial design, response surface method and Taguchi method are the main ways to optimize the welding process parameters. Heideman et al. [6] adopted 24 factorial design to optimize the process parameters of dissimilar Al/Cu joint and observed that the rotational velocity had a great influence on the tensile shear load (TSL). Moreover, the average TSL increased by 150% when the rotational velocity increased to 2000 from 1000 rpm, while no increase was observed when the rotational velocity increased to 3000 from 2000 rpm. Manickam and Balasubramanian [7] used response surface method to predict the TSL of dissimilar Al/Cu joint and a maximum TSL of 4.7 kN was obtained. Siddharth et al. [8] also used the response surface method to optimize the FSSW process parameters of dissimilar Al/Cu joint and successfully pr
Data Loading...
