不同W含量Al/W活性材料的冲击压缩特性

In this paper, Al/W active materials with different W additions were prepared by molding and sintering processes. Based on the split Hopkinson pressure bar (SHPB) technology, copper sheets and rubber sheets were used for wave shaping, and dynamic compression and destruction characteristics of Al/W materials with different ratios were evaluated. The experimental results showed that with the increase of W additions, the pores and microcracks inside the Al/W material gradually increased. With different W additions, the dynamic compression deformation and failure characteristics of the Al/W material exhibited obvious differences. When the mass fractions of W are 44% and 64%, the stress-strain curves of Al/W under different strain rates exhibited elastic-plastic strengthening deformation characteristics, and the failure strain increased with the increase of strain rate. Al/W materials with a W mass fraction of 83% exhibited the strain softening characteristic in the plastic deformation stage. When the W mass fraction reached 91%, the Al/W material failed quickly after reaching the breaking strength, and the breaking strain is maintained at about 0.03. With the increase of W additions, the transformation of Al/W deformation mode is the result of the interaction between the reinforcing phase W and the internal defects of the material.