The influence of annealing heat treatment on the interface evolution of Al ۱۰۵۰/Mg AZ۳۱B bilayer sheet

In this study, special attention has been paid to effect of annealing time on the microstructure and interface ofAl۱۰۵۰/MgAZ۳۱B laminated metal composite. This composite consists of ۲mm Aluminum and ۱.۵mm Magnesiumsheets which has been preheated at ۴۰۰°C for ۲۰ minutes before single pass rolling performed with the reduction ratioof ۴۰% to fabricate bilayer composite; Then annealing for ۱, ۳ and ۶ hours at temperature of ۲۲۵°C was carried out.The results indicate that according to SEM analysis, no new phases were observed in the interface and X-shapeddistribution of elements along with the interface show atomic diffusion. Further, by increasing annealing time, due toincrease of diffusion rate, the thickness of interface was increased. In addition, the hardness values of Al, interface andMg, after increase of anneal holding time, decreased.

کلیدواژه ها:

Laminated metal composite ، Interface ، Annealing ، Aluminum alloy ، Magnesium alloy