Abstract:A novel Fe-17Mn-5Cr-1.5Al/ Polyurethane (PU) high damping composite is successfully prepared by the adhesive welding method, which realizes a uniform controlled distribution of PU layers and their close combinations with Fe-17Mn-5Cr-1.5Al layers. IF equipment is employed to measure the damping capacity of Fe-17Mn-5Cr-1.5Al/PU composites, and the results indicate the peak position of Fe-17Mn-5Cr-1.5Al/ PU composite all shifts obviously toward higher temperature with the increasing measurement frequency, which indicates its typical relaxation features. The relationships of the IF peak height with the PU thickness or layer numbers have been researched, and the results indicate the relaxation strength of the IF peak reaches a maximum when the PU thickness is 2.0 mm or the PU layers number is 2. The high damping of Fe-17Mn-5Cr-1.5Al/ PU composite is ascribed to the high damping of PU. In addition, the bending strength of Fe-17Mn-5Cr-1.5Al/PU composite increases with the increasing of PU thickness and layer numbers, and its good bending strength is ascribed to perfect mechanical property of Fe-17Mn-5Cr-1.5Al alloy.