(東南大學(xué) 材料科學(xué)與工程系， 南京 210096)
摘 要: 研究了多孔ZL101鋁合金(AlSi7Mg0.45)的壓縮應(yīng)力-應(yīng)變曲線與孔結(jié)構(gòu)的關(guān)系。隨孔徑的減小，它的彈性模量從270MPa增加到550MPa；屈服強(qiáng)度(σc)從3MPa增加到20MPa；隨孔隙率的減小，屈服強(qiáng)度增加。多孔鋁合金具有高的比強(qiáng)度，其σc2/3/ρ(梁)及σc1/2/ρ(板)分別為2.5～7.0和1.6～4.1，與鋼和Al合金相當(dāng)，而密度只有Al合金的40%，可用作輕質(zhì)結(jié)構(gòu)材料；它的吸能能力(C)可達(dá)到3～7MJ/m3,又可用作吸能緩沖材料使用。
關(guān)鍵字: 多孔鋁合金； 孔徑； 孔隙率； 比強(qiáng)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
