Effect of the Rolling Process on the Interface Microstructure andProperties of Cast-rolled Ti-Al Composite Plate
Author of the article:CHEN Wenlu1, FU Zixuan1, XU Guangming2, XU Panning2, ZHANG Tao2, LI Yong3
Author's Workplace:1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; 2. Key Laboratory ofElectromagnetic Processing of Materials Ministry of Education, Northeastern University, Shenyang 110819, China; 3. StateKey Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
Key Words:cast-rolling bonding; Ti/Al composite plate; rolling technology; interfacial bonding strength
Abstract:
In addition to the heat treatment process, the rolling process is also an important factor affecting the stability andinterface bonding strength of cast-rolled Ti/Al composite plates. In this paper, different Ti/Al composite plates wereobtained by changing the rolling temperature and deformation during the process of casting and rolling. The microstructureand interface bonding properties of the composite plates were characterized and tested by means of SEM, EBSD, XRD, etc.The results show that when rolling at different temperatures with 50% deformation, the composite plate warps to differentdegrees. Under high-magnification scanning electron microscopy, a serrated interface is observed at a rolling temperature of470 ℃, while a wavy interface is observed at 500 and 530 ℃. Moreover, increasing the rolling temperature enhances thebonding strength of the composite plate. When the deformation is less than 50% , the average bonding strength of thecomposite plate increases with increasing deformation during the rolling process at a constant temperature. When thedeformation amount is 75% , the titanium layer is too thin, and the change is uneven, resulting in the fracture of thetitanium layer and the failure of the composite plate. In summary, when the temperature is 500 ℃ and the rollingdeformation is 50%, the average bonding strength of the composite plate is the greatest.