【摘要】 分别以高塑性低强度工业纯铝、高强度低塑性的铝-镁合金及高脆性的铝-锌合金为原材料制备出相同胞结构的开孔泡沫铝,并对其进行压缩实验研究。实验结果表明,基体性能对泡沫铝合金的压缩行为和吸能性有显著影响,虽然不同基体性质的泡沫铝合金压缩过程均出现3个明显的变形区域,但变形行为不同。以高塑性工业纯铝为基体的铝泡沫表现出典型的塑性泡沫特征和较低的坍塌屈服强度,而高强度脆性基体的铝-锌泡沫呈现典型的脆性泡沫特征和较高的弹性模量及屈服强度,在相同应变量情况下,其吸能量和吸能效率均明显高于另外2种泡沫铝。更多还原

【Abstract】 Three kinds of opencell aluminium foam with the same parameter were made of the commercially pure Al with high ductile and low strength, the high strength AlMg alloy and the brittle AlZn alloy respectively. The compressive experiments on these foams have been conducted. The experimental results show that the deforming behavior and the energy absorption property of aluminium foams were affected significantly by the property of the matrix, and although the three distinct deforming regions were observed in the compression of the foams with different kinds of matrix, the difference in their deforming behavior is notable. The foam which was made of the commercially pure Al with high ductile and low stength exhibited the characteristic of typical ductile metallic foam with low plastic collapse strength, however, a typical deforming behavior of brittle metallic foam was observed in the compression of the foamed AlZn alloy with a brittle matrix of high strength. The energy absorption capacity and efficiency of the foamed AlZn alloy were much higher than those of the other two kinds of foam.更多还原