Ultrasonic nonlinear coefficient measurement and optical observation of LY12 aluminum alloy at early degradation stages

作者：Wu Bin^*; Li Jia Rui; Yan Bing Sheng; He Cun Fu

来源：Journal of Beijing University of Technology, 2012, 38(1): 22-27.

• Fatigue life assessment
• LY12 aluminum alloy
• Material degradation
• Mechanical properties of materials
• Microstructure changes
• Microstructure observation
• Nonlinear coefficient
• Nonlinear coefficient measurement
• Nonlinear measurement
• Nonlinear ultrasonic
• Optical observations
• Potential applications

Considering mechanical properties of materials for early material degradation, the nonlinear ultrasonic characteristics and microstructure changes for fatigued LY12 aluminum alloy specimens are experimentally investigated. Results show that the degradation at early stages accompanies by the ultrasonic nonlinear coefficient changes and micro morphological variety. The method combined with ultrasonic nonlinear measurements and microstructure observation has a potential application prospect for fatigue life assessment of early degradation.

• 出版日期2012
• 单位北京大学