(東北大學(xué) 材料與冶金學(xué)院，教育部材料先進(jìn)制備技術(shù)工程研究中心，沈陽(yáng) 110004)
摘 要:
關(guān)鍵字: 閉孔泡沫鋁；動(dòng)態(tài)壓縮；相對(duì)密度；屈服強(qiáng)度；表觀彈性模量
aluminum foam with Al matrix and Al-6Si matrix
（Engineering and Researching Centre of Advanced Preparation Technology of Materials, Ministry of Education,
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract:Closed-cell aluminum foam (CCAF) with Al matrix and Al-6Si matrix was prepared by method of molten body transitional foaming process, the metallography of matrix was discussed, and its dynamic compressive property was researched. The results show that the metallography of CCAF with Al matrix is simple, basically existing as small pieces (Al20CaTi2), whereas the metallography of CCAF with Al-6Si matrix is complex, mainly existing as big pieces (Al3.21Si0.47 and CaAl2Si3), long needles (Al3Ti) and small white flakes (Al2O3). Dynamic compressive results display that the stress—strain curves of CCAF with Al matrix are smooth, the zone of fractures has obvious teared trace, whereas the stress—strain curves of CCAF with Al-6Si matrix are not smooth, certain curve fluctuates markedly, and zone of fracture indicates obvious fracture characteristic of brittle materials. With increasing relative density, the whole trend of yield strength (σpl) and apparent elastic modulus (E0.2) also increases.
Key words: closed-cell aluminum foam; dynamic compression; relative density; yield strength; apparent elastic modulus
