Microscale testing of the strut in open cell aluminum foams
Microscale testing of the strut in open cell aluminum foams
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开孔泡沫铝支柱的微观测试
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
W. Soboyejo
中科院分区：
文献类型：
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作者：
J. Zhou;S. Allameh;W. Soboyejo
本文介绍了微拉伸试验的结果，从开孔泡沫铝中提取的单个支柱，在制造（F），退火（O）和T6-强化（T6）条件。结果表明，在相同的热处理条件下，泡沫支柱通常比相应的固体合金更强，更耐用。这种独特的支杆性能归因于支杆独特的晶粒结构，通常由一个晶粒组成或具有竹状晶粒结构。测得的支柱强度也被纳入力学模型，以估计泡沫强度。预测和测量的泡沫强度的比较表明，支柱性能的直接测量是至关重要的泡沫强度的精确估计。
This paper presents the results of micro-tensile testing of the individual struts that were extracted from open cell aluminum foams in the as-fabricated (F), annealed (O) and T6-strengthened (T6) conditions. The results reveal that foam struts are generally stronger and more dutile than the corresponding solid alloys under the same heat treatment conditions. The distinguished strut properties are attributed to the unique grain structures of the struts typically consisting of one grain or having bamboo-like grain structure. The measured strut strengths are also incorporated into mechanics models to estimate foam strengths. A comparison of the predicted and measured foam strengths shows that direct measurement of strut properties is critical to make precise estimation of foam strengths.