The effects of combined addition of Y and Ce on the microstructure,mechanical properties and anisotropy of as-rolled Mg-8 Li-1 Al(LA81)alloy were studied.The combined addition of Y and Ce improves the mechanical prope...The effects of combined addition of Y and Ce on the microstructure,mechanical properties and anisotropy of as-rolled Mg-8 Li-1 Al(LA81)alloy were studied.The combined addition of Y and Ce improves the mechanical properties with a low plasticity loss by solution strengthening,dispersion strengthening,grain refinement strengthening.Mg-8 Li-1 Al-0.6 Y-0.6 Ce(LA81-0.6 Y-0.6 Ce)has better mechanical properties and shows an almost isotropy.It possesses an ultimate tensile strength of 278.7 MPa and an elongation of 15.0%.Compared to LA81 alloy,the ultimate tensile strength increases by about 17.6%with an elongation reduction of only 3.5%,and a good isotropy of ultimate tensile strength and elongation(the value of ravg is near 1).展开更多
基金supported by the National Natural Science Foundation of China(Nos.51671063,51771060 and 51871068)the Heilongjiang Province Natural Science Foundation(No.ZD2017010)+1 种基金the Fundamental Research Funds for the Central Universities(No.HEUCFG201834)the Harbin City Application Technology Research and Development Project(No.2017RAQXJ032).
文摘The effects of combined addition of Y and Ce on the microstructure,mechanical properties and anisotropy of as-rolled Mg-8 Li-1 Al(LA81)alloy were studied.The combined addition of Y and Ce improves the mechanical properties with a low plasticity loss by solution strengthening,dispersion strengthening,grain refinement strengthening.Mg-8 Li-1 Al-0.6 Y-0.6 Ce(LA81-0.6 Y-0.6 Ce)has better mechanical properties and shows an almost isotropy.It possesses an ultimate tensile strength of 278.7 MPa and an elongation of 15.0%.Compared to LA81 alloy,the ultimate tensile strength increases by about 17.6%with an elongation reduction of only 3.5%,and a good isotropy of ultimate tensile strength and elongation(the value of ravg is near 1).
