Compressive Properties of Three-Layered Porous Aluminum Fabricated by Spacer Method Using Dissimilar Alloy Powders

In this study, three – layered porous aluminum consisting of AC4CH ( porosity: 70 ％ ) / pure aluminum ( 80 ％ ) / A6061 ( 75 ％ ) / and AC4CH ( 70 ％ ) / pure aluminum ( 70 ％ ) / A6061 ( 70 ％ ) were fabricated by a sintering and dissolution process. When plateau stress of each layer was signi fi cantly di ff erent, such as three – layered porous aluminum with varying porosities, exhibited clear multiple plateau regions corresponding to the deformation of each layer. In contrast, when plateau stress of each layer had a close value, such as three – layered porous aluminum with homogeneous porosities, exhibited no clear multiple plateau regions. ［ doi:10.2320 / jinstmet.J2020044 ］