Vacuum | 2019
Bonding of Zr44Ti11Cu10Ni10Be25 bulk metallic glass and AZ31B magnesium alloy by hot staking extrusion
Abstract
Abstract A new Zr44Ti11Cu10Ni10Be25 (LM1B) bulk metallic glass (BMG) and AZ31B Mg alloy composites were prepared by hot stacking extrusion process based on the thermoplastic forming ability of LM1B BMG within the supercooled liquid range (SLR). The stacking extrusion tests were carried out at three different temperature of 430\u202f°C, 440\u202f°C and 450\u202f°C, respectively, and the extrusion speed was 5\u202fmm/min. Morphology and structure of the extruded samples were characterized by the different methods. The results indicated that the LM1B BMG and AZ31B magnesium alloy can be well bonded, and welding defects at the smooth and continuous interface were negligible. The bonding mode is mainly mechanical bonding, meanwhile, a few of metallurgical bonding does exists. Significant atomic diffusion was detected in the vicinity of the interface, while the nanocrystals and partial crystallization were produced in the LM1B BMG.