To explore ambient strengthening and high temperature ductility,a combined forming approach of multidirectional forging and asymmetric rolling was proposed.A novel multicomponent ultralight Mg-3.11Li-2.31Al-1.95Sn-0.9...To explore ambient strengthening and high temperature ductility,a combined forming approach of multidirectional forging and asymmetric rolling was proposed.A novel multicomponent ultralight Mg-3.11Li-2.31Al-1.95Sn-0.94Y-0.45Er alloy was fabricated.The microstructural evolution and mechanical properties were investigated by microstructural characterization and tensile test.The combined forming results in remarkable grain refinement.The ultimate tensile strength and elongation of(255±7)MPa and 24.9%,respectively,were obtained at room temperature.The contribution of various strengthening mechanisms of the rolled alloy was obtained.Microstructural examination revealed the occurrence of dynamic recrystallization at 473-573 K and dynamic grain growth at 573-623 K.The maximum elongation of 293.9%was demonstrated at 623 K and 5×10^(-4)s^(-1).The dominate deformation mechanism at elevated temperatures is dislocation viscous glide.展开更多
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
基金supported by the National Natural Science Foundation of China(No.51334006)。
文摘To explore ambient strengthening and high temperature ductility,a combined forming approach of multidirectional forging and asymmetric rolling was proposed.A novel multicomponent ultralight Mg-3.11Li-2.31Al-1.95Sn-0.94Y-0.45Er alloy was fabricated.The microstructural evolution and mechanical properties were investigated by microstructural characterization and tensile test.The combined forming results in remarkable grain refinement.The ultimate tensile strength and elongation of(255±7)MPa and 24.9%,respectively,were obtained at room temperature.The contribution of various strengthening mechanisms of the rolled alloy was obtained.Microstructural examination revealed the occurrence of dynamic recrystallization at 473-573 K and dynamic grain growth at 573-623 K.The maximum elongation of 293.9%was demonstrated at 623 K and 5×10^(-4)s^(-1).The dominate deformation mechanism at elevated temperatures is dislocation viscous glide.
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
