【摘 要】
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The roles of Al11Sm3 and Al2Sm phases on microstructure evolution,mechanical properties and corrosion behavior of the Mg-5Sm-xAl system was investigated.The results showed that adding Al to Mg-5Sm binary alloy brought two Al-Sm phases,Al11Sm3 and Al2Sm,wh
【机 构】
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Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,She
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The roles of Al11Sm3 and Al2Sm phases on microstructure evolution,mechanical properties and corrosion behavior of the Mg-5Sm-xAl system was investigated.The results showed that adding Al to Mg-5Sm binary alloy brought two Al-Sm phases,Al11Sm3 and Al2Sm,which had two distinct roles regarding the microstructure evolution,mechanical properties and corrosion behavior of the Mg-Sm-Al alloy.Al11Sm3 produced a strong galvanic couple with the Mg matrix,and significantly accelerated the corrosion.The Al2Sm particles promoted heterogeneous nucleation and refined the grains,which increased the tensile strength and ductility.Both types of Al-Sm particles provided strengthening effect for the alloy.With higher Al contents,Al2Sm formed an Al oxide protective surface layer and increased corrosion resistance.
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