研究了泡沫纯铝和泡沫ＡｌＳｉ７Ｍｇ０．４５在单向压缩条件下的应力－应变（σ－ε）曲线，分析了它们的变形行为，并讨论了其能量吸收和能量吸收效率结果表明：泡沫纯铝与泡沫 Ａｌ合金的σ—ε曲线均由弹性变形段、平缓段和紧实段组成；在压缩过程中，泡沫纯铝的骨架变形以弯曲为主，泡沫 ＡｌＳｉ７Ｍｇ０．４５的骨架变形主要由局部断裂产生；在相同孔隙率下，泡沫 ＡｌＳｉ７Ｍｇ０．４５的能量吸收大于泡沫纯铝；能量吸收效率与应变有关，存在一个峰值 The stress-strain curves of AlSi7Mg0.45 and AlSi7Mg0.45 foam under uniaxial compression were studied. Their deformation behaviors were analyzed. The energy absorption and energy absorption efficiency were discussed. The results show that the foam pure aluminum The σ-εcurve of AlSi7Mg0.45 foam was mainly composed of elastic deformation section, flat section and compacted section. During the compression, the skeleton deformation of pure aluminum foam was mainly bending. The skeleton deformation of AlSi7Mg0.45 foam was mainly caused by local fracture ; At the same porosity, the energy absorption of foam AlSi7Mg0.45 is greater than that of foam pure aluminum; the energy absorption efficiency is related to strain, and there is a peak