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首页> 外文会议>International Conference on Advanced Nondestructive Evaluation >Statistical Analysis of Casting Defects in Microstructure for Understanding the Effect on Fatigue Property of 17-4PH Stainless Steel
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Statistical Analysis of Casting Defects in Microstructure for Understanding the Effect on Fatigue Property of 17-4PH Stainless Steel

机译：了解微观结构铸造缺陷的统计分析，了解17-4PH不锈钢疲劳性能的影响

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High strength materials have been used for critical components in order to ensure the reliability of aircraft gas turbine engine. But it usually costs high to maintain their premium quality. Therefore, the optimum quality level of materials should be defined under operating condition by material property estimation technique in order to meet the requirement of reliability and economical efficiency. Most cast rotating parts of gas turbine engine have casting defects caused during the casting process. The casting defects less than certain acceptable limit can be permissible for usage. So, it is very important to understand material defect shape and distribution, and its effect on mechanical properties exactly. In this study, 17-4PH stainless steel specimens with variable internal casting defects were prepared to investigate the fatigue property characteristics. The defect fraction and condition were estimated in microstructure by statistical analysis. The correlation between estimated defect condition and fatigue property was discussed.
机译：高强度材料已用于关键部件，以确保飞机燃气轮机发动机的可靠性。但它通常成本高，以保持其优质。因此，应通过材料性能估计技术在操作条件下定义最佳质量水平，以满足可靠性和经济效率的要求。燃气涡轮发动机的大多数铸件旋转部件具有在铸造过程中引起的铸造缺陷。可以允许使用小于某些可接受的极限的铸造缺陷。因此，了解材料缺陷形状和分布非常重要，并确切地对机械性能的影响。在本研究中，制备了17-4ph的不锈钢样品，具有可变内铸造缺陷的缺陷，以研究疲劳性能特性。通过统计分析在微观结构中估计缺陷部分和病症。讨论了估计缺陷条件与疲劳性质的相关性。

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