Abstract
The effect of annealing process on the microstructures and mechanical properties of Mg/Al composite plates fabricated by cast-rolling was investigated in this study. The results show that the interfacial transition zone can be divided into three regions: a Mg transition region, an Al transition region, and an intermediate region, respectively. The microhardness of the interfacial transition zone is higher than that of AZ31B and A356.When the annealing temperature is 250 oC, the thermodynamic and kinetic conditions required for the formation of new intermetallic compounds have been met. While, for an annealing temperature at, or above, 300 oC, the width of the interfacial transition zone, annealing temperature, and time follow model: ∆X2=2.07×104exp−60407RTt−11.54exp21211RT. The shear strength reaches a maximum value of 116 MPa when the annealing temperature is 200 oC. Cleavage fracture occurs at the side of the AZ31B alloy and quasi-cleavage fracture at the side of the A356 alloy.
Highlights
Bimetallic composite plates have received considerable attention from the automobile, aerospace, and defence industries because of their improved material properties compared to those of single-layer sheet metals and alloys, especially magnesium alloy and aluminium alloy combined to form composite plate
The inverse pole figure (IPF) maps and phase maps of the composite plates are shown in Figure 2, which shows the as-rolled specimen after being annealed at 250 oC for 180 min
The A356 alloy, applied at 640 oC, covered the AZ31B sheets which were maintained 150 oC, so, because the temperature was so high, dynamic recovery and recrystallization occurred on these bilateral alloy specimens during rolling
Summary
Bimetallic composite plates have received considerable attention from the automobile, aerospace, and defence industries because of their improved material properties compared to those of single-layer sheet metals and alloys, especially magnesium alloy and aluminium alloy combined to form composite plate. Magnesium alloy is the lightest metal structural material, with many advantages such as high specific strength, high specific elastic, excellent damping performance, good dimensional stability, strong electromagnetic shielding capacity, abundant resources and recyclable reuse. As is well-known that aluminum alloys have some advantages such as high specific strength, good plastic and strong corrosion resistance. It is necessary to fabricate the Mg/Al bimetallic composite plates for combining the advantages of the two alloys. The two materials benefit from each other in terms of performance and produce a synergistic effect, which makes the composite plate better than the original material, rendering it more able to meet various demands imposed by use in most applications
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
