变质处理及热处理对泡沫铝合金压缩吸能性的影响

Effects of Modification and Heat Treatment on Energyabsorption Capacities of Aluminum Alloy Foams

采用可溶石膏型预制块,通过加压渗流的方法制备了高孔隙率的ZL101开孔泡沫铝合金,并对泡沫铝合金进行变质处理和T6热处理。通过压缩试验研究了变质处理和固溶热处理对泡沫铝合金的压缩吸能性能的影响。结果表明,通过石膏型渗流法制备的开孔泡沫铝合金的孔隙率可以达到89.3%～90.7%,采用变质处理和热处理能够有效提高开孔泡沫铝合金的强度,获得高比强度的开孔泡沫铝合金,其比强度达到0.82,理想吸能效率可达85%。

The ZL101 open-cell aluminum alloy foams were fabricated by pressure-infiltration with the matrix made by the soluble gypsum blocks,and then the aluminum alloy foams were treated by modification and T6 treatment.Effects of these treatments on energy-absorption capacity and energy absorption efficiency were investigated by the quasi-static compression testing.The results show that porosity of the aluminum alloy foams reach 89.3%～90.7%.Strength of the open-cell aluminum alloy foams can be effectively improved by modification and heat treatment,and high specific strength of open-cell aluminum alloy foam with specific strength of 2.2 and approximately 85% energy-absorption can be obtained.