Damping behavior and mechanical properties of Mg-Cu-Mn alloy processed by equal channel angular pres

• 作 者: 郑明毅 范国栋 佟立波 胡小石 吴昆
• 机 构: School of Materials Science and Engineering,Harbin Institute of Technology,
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2008年S1期
• 关键词: processed pressing ECAP annealed tensile annealing angular ductility refined sub

Equal channel angular pressing(ECAP) was conducted at 250℃for 4 passes to the as-extruded Mg-3%Cu-1%Mn alloy with high strength and high damping capacity.After ECAP processing,the grain of as-extruded alloy is significantly refined to about 4μm,both yield strength and tensile strength of the as-extruded Mg-Cu-Mn alloy are decreased,but the ductility is improved.After the ECAP processing,the damping capacity of Mg-Cu-Mn alloy is decreased at room temperature,while is substantially increased at elevated temperatures,After annealing at 300℃for 1 h,both yield strength and tensile strength of the ECAPed alloy are further decreased,but the ductility is significantly improved.The damping capacity of the as-annealed alloy is increased at room temperature, while is decreased at elevated temperatures.The mechanisms for damping capacity of the alloy at ambient and elevated temperatures were discussed.

Equal channel angular pressing (ECAP) was conducted at 250 ° C for 4 passes to the as-extruded Mg-3% Cu-1% Mn alloy with high strength and high damping capacity. After ECAP processing, the grain of as-extruded alloy is significantly refined to about 4 μm, both yield strength and tensile strength of the as-extruded Mg-Cu-Mn alloy are decreased, but the ductility is improved. After the ECAP processing, the damping capacity of Mg-Cu-Mn alloy is decreased at room temperature, while is substantially increased at elevated temperatures, after annealing at 300 ° C for 1 h, both yield strength and tensile strength of the ECAPed alloys are decreased decreased, but the ductility is significantly improved. damping capacity of the as-annealed alloy is increased at room temperature, while is decreased at elevated temperatures. mechanisms for damping capacity of the alloy at ambient and elevated temperatures were discussed.