Effect of Counpound Addition of Trace Elements on Microstructure and Strength and Toughness of Al-Si-Mn-Mg Alloy
In order to explore the influence of counpound addition of trace element on the size,morphologies and mechanical properties of Al-Si grains,Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc(x=0,0.2,0.4,0.5,%)alloys were prepared by melting-casting,and the morphology,size,strength and tonghness of alloys were characterized and ana-lyzed by metallographic structure diagram,scanning electron microscopy,and energy spectrum.The results indicate that the main phase of as-cast Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc alloy includes α-Al matrix,eutectic Si phase,Al3Ti,Al3Sc,AlMnTi,and Fe-rich phase.When the Ti content is 0.15%,alloy with the desirable grain refine-ment effect can be obtained by adjusting the Sc content to 0.2%,where the average grain size is 46 μm,tensile strength reaches 221 MPa,and elongation is 5.9%.
NETL
NSTL
万方数据
维普
