Compressive property and energy absorption of porous sintered fiber metals

Porous sintered fiber metals with different relative densities were successfully prepared by using vacuum sintering process. Compressive property and energy absorption capacity of porous sintered fiber metals were investigated under quasi-static conditions. The results indicate that compressive stress-strain curves of porous sintered fiber metals exhibit three distinct deformation regions: elastic region, stress plateau region and densification region. The compressive property of porous sintered fiber metals can be interpreted by the Gibson-Ashby theory. It is found that compressive property, energy absorption capacity and energy absorption efficiency of porous sintered fiber metals present significant relative density sensitivity. The energy absorption capacity of the samples rises from 7.17 to 25.75 MJ·m ^-3 when relative density increases from 0.177 to 0.355.