(东南大学 材料科学与工程系， 南京 210096)
摘 要: 研究了多孔ZL101铝合金(AlSi7Mg0.45)的压缩应力-应变曲线与孔结构的关系。随孔径的减小，它的弹性模量从270MPa增加到550MPa；屈服强度(σc)从3MPa增加到20MPa；随孔隙率的减小，屈服强度增加。多孔铝合金具有高的比强度，其σc2/3/ρ(梁)及σc1/2/ρ(板)分别为2.5～7.0和1.6～4.1，与钢和Al合金相当，而密度只有Al合金的40%，可用作轻质结构材料；它的吸能能力(C)可达到3～7MJ/m3,又可用作吸能缓冲材料使用。
关键字: 多孔铝合金； 孔径； 孔隙率； 比强度； 能量吸收
energy absorption capability of
porous aluminum alloy
（Department of Materials Science and Engineering,
Southeast University,Nanjing 210096, P.R.China）
Abstract:The relationship between the compressive behavior and the energy absorption capability of the porous aluminum alloy was investigated. The results show that, the elastic modulus increases from 270MPato 550MPa and the yield strength increases from 3MPa to 20MPawith the decrease of the pore diameter; the yield strength increases with the decrease of the porosity; the porous aluminum alloy has high specific strength and energy absorption capability. Its σc2/3/ρ(beam) and σc1/2/ρ(board) reach to 2.5～7.0 and 1.6～4 respectively. These data correspond to those of steel and Al.
Key words: porous aluminum alloy; pore diameter; porosity; specific strength; energy absorption
