采用渗流法制备了具有梯度孔径结构的多孔铝合金,通过压缩试验对具有不同相对密度的多孔铝合金的压缩屈服强度及能量吸收性能进行了研究.结果表明:梯度孔径多孔铝合金的压缩应力-应变曲线包含两个阶段,即弹性变形阶段和塑性屈服阶段;其压缩屈服强度与Ashby-Gibson模型吻合良好;此多孔铝合金的压缩屈服强度、能量吸收能力均随相对密度的增加而提高.
Gradual porous aluminum alloys were prepared by infiltration method. Compression tests were carried out for the porous aluminum alloys with different relative densities. Compressive yield strength and energy absorption properties were investigated. The results show that the compressive stress-strain curves of the alloys consisted of two distinct regions, i. e., elastic deformation region and plastic collapse region. The relationship between the compressive yield strength and relative density could be described with Ashby-Gibson's model The compressive yield strength and energy absorption capability of the alloys gradually increased with relative density increasing.
参考文献
| [1] | 刘伟伟,黄可,何思渊,何德坪.梯度孔径通孔多孔铝合金的空气吸声性能[J].机械工程材料,2007(12):72-74,78. |
| [2] | 郑明军,何德坪,陈锋.多孔铝合金的压缩应力-应变特征及能量吸收性能[J].中国有色金属学报,2001(z2):81-85. |
| [3] | Jiang Bin;Wang Zejun;Zhao Naiqin .Effect of pore size and relative density on the mechanical properties of open cell aluminum foams[J].Scripta materialia,2007(2):169-172. |
| [4] | T. G. Nieh;K. Higashi;J. Wadsworth .Effect of cell morphology on the compressive properties of open-cell aluminum foams[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):105-110. |
| [5] | Y. Matsumoto;A.H. Brothers;S.R. Stock .Uniform and graded chemical milling of aluminum foams[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):150-157. |
| [6] | 杨东辉,何德坪.多孔铝合金的孔隙率[J].中国科学B辑,2001(03):265-271. |
| [7] | C. SAN MARCHI;A. MORTENSEN .DEFORMATION OF OPEN-CELL ALUMINUM FOAM[J].Acta materialia,2001(19):3959-3969. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%