J. Mater. Sci. Technol. ›› 2020, Vol. 53: 41-52.DOI: 10.1016/j.jmst.2020.01.069

• Research Article • Previous Articles     Next Articles

Improving the mechanical property of dissimilar Al/Mg hybrid friction stir welding joint by PIO-ANN

Wei Hua,b, Zhongwei Maa, Shude Jia,b,*(), Qi Songa,b,*(), Mingfei Chenb, Wenhui Jiangb,c   

  1. a College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China
    b Engineering Research Center of Industrial-grade Multi-rotor UAV of Liaoning Province, Shenyang 100136, China
    c SLZY(Shenyang) High-tech Co, Ltd, Shenyang 1101172, China
  • Received:2019-12-09 Revised:2020-01-03 Accepted:2020-01-28 Published:2020-09-15 Online:2020-09-21
  • Contact: Shude Ji,Qi Song

Abstract:

Ultrasonic-stationary shoulder assisted friction stir welding (U-SSFSW) is a novel hybrid welding technique, which reveals promising prospect in joining Al/Mg dissimilar alloys. A thorough understanding of U-SSFSW process is imperative for the further application of this technique. Pigeon-inspired optimization (PIO) is a swarm intelligent optimization algorithm and is proposed in mathematical modeling and process optimization by artificial intelligence. In this study, PIO optimized artificial neural network (PIO-ANN) was firstly established to acquire the relationships between the inputs and output of the Al/Mg welding process by U-SSFSW technique. A reliable PIO-ANN was achieved and the joint with a tensile strength of 161 MPa was acquired under the PIO optimized parameters. This tensile strength is higher than any ever-reported results with the similar welding condition. The joint formation, microstructure, microhardness and fracture behaviors were systemically investigated based on the reported studies and the confirmation experiment of this study to explore the enhancing mechanism of U-SSFSW Al/Mg joint.

Key words: Hybrid friction stir welding, Al/Mg dissimilar alloys, Artificial neural network, Pigeon-inspired optimization, Ultrasonic