Nondestructive and in-situ detectable method for predicting change trend of elongation after tensile fracture of 625 alloy

The invention discloses a lossless and in-situ detectable method for predicting the change trend of the elongation after tensile fracture of a 625 alloy, which is based on the principle that a precipitated phase such as carbide belongs to a second phase in a corrosion-resistant alloy, and the struct...

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Bibliographische Detailangaben
Hauptverfasser: HU WENBIN, TIAN QIUCHENG, GAO ZHIMING, XIU YAN, XIA DAHAI, LIU ZHIHONG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses a lossless and in-situ detectable method for predicting the change trend of the elongation after tensile fracture of a 625 alloy, which is based on the principle that a precipitated phase such as carbide belongs to a second phase in a corrosion-resistant alloy, and the structure and the component of the precipitated phase are greatly different from those of a matrix, so that corrosion usually occurs preferentially in the region and a region adjacent to the region. According to the method, an electrochemical impedance technology is utilized to predict the change trend of the elongation after tensile fracture of the 625 alloy subjected to long-time aging treatment, an impedance fitting parameter charge transfer resistance Rt is taken as a prediction index, a second phase separated out of the 625 alloy is detected, the change of the elongation after fracture of the material is evaluated, and then safe proceeding of corresponding production is guided. 本发明公开一种无损且可原位检测的预测625合金拉伸断后伸长率变化趋势的方法,