Damping behavior of porous CuAlMn shape memory alloy

摘要

Internal friction measurements were conducted to examine the damping behavior of a porous Cu-11.9Al-2.5Mn (wt.%) shape memory alloy. It is found that the internal friction background significantly increased with increasing volume fraction or decreasing diameter of the pores due to stress concentration and mode conversion around pores when loaded, the refined microstructures and increased dislocation population.