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本文应用断裂力学和扫描电镜的分析方法,对曾发生的脆断失效事故,进行了综合的研究和分析。结果表明,陀螺仪转子体材料失效的主要原因,是由于合金密度的不均匀性和内部存在隐裂纹所致。当马达动平衡高速旋转时产生共振、疲劳,致使裂纹迅速失稳扩展,造成低应力脆性飞裂。实验表明,断裂韧性K_(IC)值是表征该种合金综合性能的一项重要指标,也是衡量材料失效的重要参数。
In this paper, fracture mechanics and scanning electron microscopy analysis method, the occurrence of brittle fracture failure, conducted a comprehensive study and analysis. The results show that the main reason of gyroscope rotor material failure is due to the inhomogeneity of alloy density and the existence of internal crack. When the motor dynamic balance high-speed rotation of the resonance, fatigue, resulting in rapid instability crack growth, resulting in low-stress brittle fissure. Experiments show that the fracture toughness K_ (IC) value is an important indicator of the comprehensive performance of the alloy is an important parameter to measure the material failure.