Mechanical behaviors of quasi-ordered entangled aluminum alloy wire material

Quasi-ordered entangled aluminum alloy wire materials with nominal porosity of 57–77% have been fabricated by assembling a set of aluminum alloy wires with diameter of 0.28 mm. The as-prepared materials display three-stage stress–strain behavior under uniaxial compressive loading, i.e., initial nonlinear ‘quasi-elastic’ deformation, strain-hardening ‘pseudo-platform’ stage, and the final densifying stage. The experiment indicates that the structural deformation mechanism dominates the initial stress–strain behavior. At the elastic stage, the materials reveal a significant ‘strain-hysteresis effect’. The compressive yield strength and the elastic modulus exhibit a significant dependence of porosity, i.e., both decrease as the porosity increases. The data obey the typical power law relationship suggested by Gibson–Ashby.