研究了多孔ZL101铝合金(AlSi7Mg0.45)的压缩应力应变曲线与孔结构的关系. 随孔径的减小, 它的弹性模量从270MPa增加到550MPa; 屈服强度(σc)从3MPa增加到20MPa; 随孔隙率的减小, 屈服强度增加. 多孔铝合金具有高的比强度, 其σ2/3c/ρ(梁)及σ1/2c/ρ(板)分别为2.5~7.0和1.6~4.1, 与钢和Al合金相当, 而密度只有Al合金的40%, 可用作轻质结构材料; 它的吸能能力(C)可达到3~7MJ/m3, 又可用作吸能缓冲材料使用.
参考文献
[1] | Ashby M F;Evans A G.Metal Foams[M].Boston: B-H Press,2000:6. |
[2] | 吴照金;何德坪 .Changes in porosity of foamed Al during solidification[J].Chinese Science Bulletin,2000,45(18):1667. |
[3] | 杨东辉;何德坪 .Porosity of porous Al alloy[J].中国科学B辑(英文版),2001,44(04):411-419. |
[4] | 何德坪;张勇 .铝熔体在多孔介质中的渗流过程[J].材料研究学报,1997,11:113. |
[5] | 宋振纶;何德坪 .铝熔体泡沫形成过程中粘度对孔结构的影响[J].材料研究学报,1997,11:257. |
[6] | 王斌,何德坪,舒光冀.泡沫Al合金的压缩性能及其能量吸收[J].金属学报,2000(10):1037-1040. |
[7] | 吴照金,何德坪.胞状铝的压缩形变和吸能性能研究[J].应用科学学报,2001(04):357-361. |
[8] | McIntyre A;Anderton G E .Fracture properties of a rigid polyurethane foam over a range of densities[J].Polymer,1979,20:247. |
[9] | Davies G J;Zheng Shu .Metallic foams:their production,properties and applications[J].Journal of Materials Science,1983,18:1899. |
[10] | Ashby M F .The mechanical properties of cellular solids[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1983,14:1755. |
[11] | Miltz J;Gruenbaum G .Evaluation of cushioning properties of plastic foams from compressive measurements[J].Polymer Engineering and Science,1981,21:1010. |
[12] | Gibson L J;Ashby M F.Cellular Solids-Structure and Properties[M].Cambridge:Cambridge University Press,1999 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%