Analysis of the influence of spinning temperature on the coordinated deformation of Mg/Al composite tube

Abstract. Currently, the focus of research in the realm of Mg/Al layered metal composites predominantly lies within the domain of plate structures, while the development of Mg/Al bimetallic composite tubes (BCTs), which hold significant utility, remains in its nascent exploratory phase. Among the various forming methodologies applied to BCTs, the spinning process has garnered considerable attention due to its advantageous attributes encompassing minimal forming loads, uncomplicated tooling requirements, cost-effectiveness, and high dimensional precision. This study delves into the outcomes of forming Mg/Al BCTs at diverse spinning temperatures via a synergy of theoretical frameworks and simulation experiments facilitated by the Simufact Forming software platform. A novel approach is presented for assessing the degree of coordinated deformation at the interface by scrutinizing the interface strain gradient, elucidating the intrinsic correlation between the interface strain gradient and the bonding strength at the interface. Through meticulous analysis, it is discerned that the BCTs exhibit the least interface strain gradient and axial extension disparity when subjected to a spinning temperature of 350°C. Consequently, in the context of spinning preparation for Mg/Al BCTs, a spinning temperature of approximately 350°C is recommended to engender Mg/Al BCTs characterized by enhanced harmonized deformation properties.