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《Journal of Materials Engineering》 2011-05
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Three-point Bending Test of 2A50 Forging Aluminum and Analysis by High-resolution Computed Tomography

AO Bo,DENG Cui-zhen,WU Guan-hua(Key Laboratory of Nondestructive Testing(Ministry of Education),Nanchang Hangkong University,Nanchang 330063,China)  
Three-point bending test of notched specimens of 2A50 forging aluminum was carried out by high frequency fatigue tester,specimens of computed tomography(CT) which contain fatigue crack were obtained.Fatigue specimen was reconstructed by high-resolution CT,CT images of crack were analysed;a reference plane was introduced,crack was projected on the reference plane in all CT images,and a damage risk factor was proposed.Results show that the damage of fatigue is uneven in different regions,the three-dimensional(3D) morphology of crack is visualized;the value of damage risk factor is 0.34,the defect area is 2.1 times the size of the most serious damage cross section,the damage risk factor is synchronized varying according to the fatigue cycles,it can be used to characterize damage of fatigue.
【Fund】: 航空科学基金资助项目(20090756001)
【CateGory Index】: TG115
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