研究了 Mg L i4Al和 Mg L i8Al合金的阻尼性能。结果表明 ,Mg- L i- Al合金的阻尼性能随锂含量的增多和温度的提高而明显增高。其中 Mg L i8Al合金的室温阻尼性能达到 Q- 1 =0 .0 1的高阻尼值。Mg L i8Al合金的阻尼明显大于Mg L i4Al合...研究了 Mg L i4Al和 Mg L i8Al合金的阻尼性能。结果表明 ,Mg- L i- Al合金的阻尼性能随锂含量的增多和温度的提高而明显增高。其中 Mg L i8Al合金的室温阻尼性能达到 Q- 1 =0 .0 1的高阻尼值。Mg L i8Al合金的阻尼明显大于Mg L i4Al合金的阻尼是由于 Mg L展开更多
To obtain magnesium alloys with a low density and improved mechanical properties,Y element was added into Mg−4Li−3Al(wt.%)alloys,and the effect of Y content on microstructure evolution and mechanical properties was in...To obtain magnesium alloys with a low density and improved mechanical properties,Y element was added into Mg−4Li−3Al(wt.%)alloys,and the effect of Y content on microstructure evolution and mechanical properties was investigated by using optical microscopy,scanning electron microscopy and tensile tests.The results show that mechanical properties of as-cast Mg−4Li−3Al alloys with Y addition are significantly improved as a result of hot extrusion.The best comprehensive mechanical properties are obtained in hot-extruded Mg−4Li−3Al−1.5Y alloy,which possesses high ultimate tensile strength(UTS=248 MPa)and elongation(δ=27%).The improvement of mechanical properties of hot-extruded Mg−4Li−3Al−1.5Y alloy was mainly attributed to combined effects of grain refinement,solid solution strengthening and precipitation strengthening.展开更多
基金support from the National Science Foundation of China (No.51971249)the Natural Science Foundation of Shandong Province,China (No.ZR2020KE012)the Science and Technology Planning Project of Longkou City,China (No.2021KJJH025).
文摘研究了 Mg L i4Al和 Mg L i8Al合金的阻尼性能。结果表明 ,Mg- L i- Al合金的阻尼性能随锂含量的增多和温度的提高而明显增高。其中 Mg L i8Al合金的室温阻尼性能达到 Q- 1 =0 .0 1的高阻尼值。Mg L i8Al合金的阻尼明显大于Mg L i4Al合金的阻尼是由于 Mg L
基金The work was supported by the National Natural Science Foundation of China(No.51401115)the Promoted Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province,China(No.BS2013CL034)partially by the Fundamental Research Funds of Shandong University,China(2016JC016).
文摘To obtain magnesium alloys with a low density and improved mechanical properties,Y element was added into Mg−4Li−3Al(wt.%)alloys,and the effect of Y content on microstructure evolution and mechanical properties was investigated by using optical microscopy,scanning electron microscopy and tensile tests.The results show that mechanical properties of as-cast Mg−4Li−3Al alloys with Y addition are significantly improved as a result of hot extrusion.The best comprehensive mechanical properties are obtained in hot-extruded Mg−4Li−3Al−1.5Y alloy,which possesses high ultimate tensile strength(UTS=248 MPa)and elongation(δ=27%).The improvement of mechanical properties of hot-extruded Mg−4Li−3Al−1.5Y alloy was mainly attributed to combined effects of grain refinement,solid solution strengthening and precipitation strengthening.
