摘要:用高温短时拉伸试验分析了LD10合金的高温力学性能,同时还利用扫描电镜分析了每个温度拉伸试样断口的显微组织和断口形貌.结果表明:LD10的高温强度在470℃前遵循常规的温度强度关系,即温度升高,强度降低;塑性指标在470℃之前随着温度的升高而增大,但在500℃左右材料的塑性大幅度下降.各温度点的显微组织表现瘟相基体中分布着较多椭圆形相和多角块状相,不同温度点这些相的形状、大小和数量不同.断口的宏观特征表现为韧性断裂和脆性断裂特征共存的现象.
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