Effect of TiH2 on preparation of closed-cell aluminum foam and its compressive behavior

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. A03; pp. 1442 - 1445
• Main Author: 杨国俊 尉海军 姚广春
• Format: Journal Article
• Language: English
• Published: School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China 01.12.2006
• Subjects: 泡沫材料; 铝合金; TiH2; closed-cell aluminum foam; granularity; porosity; mechanical behavior
• ISSN: 1003-6326

The vesicant problem during the process of preparing closed-cell aluminum foam by molten body transitional foaming process was discussed and the effect of granularity and addition of TiH2 on porosity of closed-cell aluminum foam was investigated. The static compressive behavior of closed-cell aluminum foam and the influence of porosity on static compressive property of closed-cell aluminum foam were researched as well. The results show that with increasing granularity of TiH2, the porosity of closed-cell aluminum foam firstly increases and then decreases gradually, the granularity should be controlled in the range of 38-74μm which can result in higher porosity. The porosity of closed-cell aluminum foam increases with the increasing addition of TiH2, and the addition of TiH2 should be controlled fi＇om 1.5% to 2.5% which can result in homogeneous cell and moderate strength of closed-cell aluminum foam. The compressive process of closed-cell aluminum foam obviously displays linear elastic phase, plastic collapse phase, and densification phase, and the compressive strength grows with decreasing porosity.