WANG Jingfeng;LING Chuang;HU Yaobo
. 2011, 42(10): 1902-1906.
Abstract (
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The phase structures, microstructure and damping capacity of rolled CuMn50 alloy were tested using X-ray diffractometer, scanning electron microscopy and dynamic mechanical thermal analyzer. The effect of heat treatment on damping capacity and microstructure of rolled CuMn50 alloy was study. The result indicated that the damping capacity increased slowly at first and then increased rapidly with Strain amplitude increasing. Manganese-copper alloy began to appear grains with the cooling rate increasing, and the damping capacity of rolled CuMn50 alloy decreased with the cooling rate increasing, the slow cooling rate is conducive to the production of manganese-rich, played a role in aging. After aged at 420℃ for different time, the damping capacity of furnace cooling specimens is further increased, however, aging time did not affect the damping properties of the sample. After aged at 420℃ for different time, With the aging time increases, the grain first becomes coarse, followed by precipitation of second phase α-Mn, and the damping capacity of water cooling specimens increased to the peak value first and then slightly reduced with the aging time increasing. When the aging temperature is about 420℃,the aging time is about 8h,the best damping capacity of water cooling specimens is obtained.