Room temperature damping correlated to the microstructures in Cu–20.4Al–8.7Mn*
Hao Gang-Linga)†, Wang Xin-Fub), Wang Huic), Li Xian-Yua)
       
Optical micrographs of the alloy at different states: (a) as-cast, (b) aged at 150 °C, (c) aged at 300 °C, (d) local magnified microstructures showing precipitation particles for the selected square area in panel (c).