摘要
采用爆炸焊接技术制备以AZ31B镁合金为基板,以6061铝合金为覆板的AZ31B/6061合金的层状复合板。对复合板界面的宏观形貌、微观组织、界面元素扩散行为及界面接合性能进行测试、分析。结果表明:AZ31B/6061合金爆炸复合板接合界面呈波状接合;靠近接合界面处的塑性变形程度最大,以孪晶和再结晶形式为主;在AZ31B一侧靠近界面处出现与界面呈45°的绝热剪切带组织,带内为动态再结晶形成的细晶粒组织;接合界面两侧的显微硬度分布为:随着距离接合界面的增大,AZ31B和6061侧的显微硬度值递减趋势;复合板的拉-剪试验结果表明,界面接合强度达193.3 MPa;复合板界面接合机制为压力焊、扩散焊及局部熔化焊综合作用的结果。
The AZ31B/6061 alloy composite plate is fabricated by explosive welding, as the base plate of AZ31 B magnesium alloy material and the flyer plate of 6061 aluminum alloy material. The macro/micro-structure, elements diffusion and bonding strength of the composite bonding interface. The results show that the bonding interface presents a periodical wave; near the bonding interface the plastic deformation is serious and microstructure in the form of twin and recrystallization mainly; adiabatic shear bands are found on the AZ31 B Mg alloy side adjacent to the interface by the direction of 45° and the microstructure is fine grain microstructure by recrystallization; the micro-hardness distribution characteristics is decrease with the increase of distance from the bonding interface both of AZ31 B and 6061 plate; the interface bonding strength is 193.3 MPa and the bonding mechanism of pressure welding, diffusion welding and local melting welding.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2016年第12期52-58,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(51375328)
