2020 Volume 61 Issue 2 Pages 326-329
A 35Mn–60Cu–3Al–2Fe (at%) alloy was prepared by vacuum induction melting followed by hot forging at 1073 K, and then heat treated at 1113 K for 5 h. Further, the alloy was semisolid heat treated at 1153, 1163, 1173 and 1183 K for 20 min. The microstructure and damping capacity of the alloys at different temperatures have been investigated comparatively. The results show that the microstructure of the alloy at 1113 K comprises single phase while that at 1153–1183 K consists of Mn-rich and Mn-poor phases. The area fraction of Mn-rich phase raises with increase in semisolid treatment temperature. The damping capacity of the alloy is lowest at 1113 K and raises with increasing the semisolid treatment temperature (1153–1183 K) due to gradually increased amount of Mn-rich phase.