The deformation behavior of DyCu ductile intermetallic compound under compression

► The DyCu alloy showed high ductility with a plastic strain of 35% under compression. ► The 〈1 1 1〉 dislocation appears to be a key contributor to the high ductility for DyCu. ► The Dy2O3 and DyCu2 phases observed did not aid or inhibit the high ductility of DyCu.