Acoustic Emission Characteristics of Fatigue Propagation of Superalloy Based on Quadratic K-entropy
Metal fatigue crack growth monitoring has been a hot topic in the study of material proper-ties.In this study,high sensitive acoustic emission technology is used to conduct online monitoring of metal fatigue crack growth.A quadratic K-entropy method is proposed for the first time,the calculation re-sults of which are used as a new parameter to analyze this uncertain process.The experimental results indicate that the acoustic emission signal in metal fatigue growth shows chaotic characteristics,and its trend has a clear corresponding relationship with the process of fatigue crack growth after the quadratic K-entropy treatment,and the fatigue fracture information can be obtained in advance.The advance rate is more than 8％of the whole process,which effectively provides a basis for the prediction of fatigue fracture.
materials failure and protectionfatigue crack growthchaotic characteristicacoustic emission
万方数据
维普
