Abstract
ZK60 strip with 4mm thickness was fabricated by Twin Roll Casting technology. The effect of annealing, solid solution and artificial aging heat treatment on microstructures, mechanical properties and damping capacities were discussed in this paper, and the optimized heat treatment parameters was also determined. Fine equiaxed structure was obtained after annealing treatment. The room temperature damping value (Q-1) of annealed ZK60 strip was 0.0085. There was a damping peak at 279.7°C after 350°C annealing treatment; this was caused by the grain boundaries sliding at a higher temperature. The room temperature damping value (Q-1) of ZK60 strip was 0.0071 after solid solution heat treatment. A very broad damping peak appeared from 280°C to 330°C. The T6 treatment parameters were solution at 375°C for 3hrs, then artificial aging at 175°C with different holding time. The best damping capacity and mechanical properties were obtained after artificial aging at 175°C for 1hr.
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