Comprehensive Nondestructive Evaluation Technology for Safety and Reliability of Engine Crankshaft

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Abstract
Ultrasonic testing and metal magnetic memory testing were comprehensively applied to detect the internal defects and superficial defects of engine crankshaft. A special detection method and device were designed for the testing. The results indicated that the internal defects of crankshaft could be detected quantitatively by using the special detection device and ultrasonic testing, whereas, the superficial defects of crankshaft could be detected by metal magnetic memory testing. The magnetic stress concentration coefficient KM was used to characterize the fatigue damage degree. By the comprehensive nondestructive method, the internal and superficial damage of engine crankshaft can be evaluated to effectively guarantee the safety and reliability of engine crankshaft.

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