论文部分内容阅读
用搅拌法制备了以MB2为基、以SiC颗粒为增强体的镁基复合材料 ,铸锭在 390℃热挤压成棒材。在温度为 380～ 560℃和应变速率为 2 .0 8× 1 0 - 3s- 1 ～ 5 .2 1× 1 0 - 1 s- 1 的范围内 ,测试了挤压态MB2 / 1 0 %SiC(体积分数 )和MB2 / 5 %SiC镁基复合材料的超塑性。MB2 / 1 0 %SiC在温度为 52 5℃、应变速率为 2 .0 8× 1 0 - 1 s- 1 时最大延伸率可达 2 2 8% ,应变速率敏感性指数为 0 .39。超塑性拉伸断口上存在丝棒状物质
The Mg-based composite material based on MB2 and reinforced with SiC particles was prepared by the stirring method. The ingot was hot-extruded into bar at 390 ℃. In the range of 380-560 ℃ and strain rate of 2.08 × 10 3 s -1 ~ 5.2 1 × 10 1 s -1, the compressive state of MB 2/1 0% SiC (Volume fraction) and superplasticity of MB2 / 5% SiC magnesium matrix composites. MB2 / 1 0% SiC has a maximum elongation of 22.8% and a strain rate sensitivity index of 0.39 at a temperature of 52 5 ℃ and a strain rate of 2.08 × 10 ~ 1 s-1. Superplastic tensile fracture exists on the wire rod material