Accession Number : AD0437223


Title :   ENGINEERING PROGRESS REPORT ON INVESTIGATION OF THE BASIC MECHANISM OF METAL FATIGUE.


Descriptive Note : Quarterly rept. no. 3, 1 Jan-31 Mar 64.


Corporate Author : REPUBLIC AVIATION CORP FARMINGDALE N Y


Report Date : 22 Apr 1964


Pagination or Media Count : 16


Abstract : Copper single crystals of orientations 100, 110, and 111 were deformed in tension at room temperature. The attenuation of a 10 mc longitudinal wave propagating in each crystal increased continuously during deformation. The change of attenuation decreases with increasing number of equally favored slip systems. After unloading, each of the crystals exhibited attenuation recovery. (Author)


Descriptors :   *METAL CRYSTALS , *SINGLE CRYSTALS , DEFORMATION , FATIGUE(MECHANICS) , COPPER , ATTENUATION , ULTRASONIC RADIATION , STRESSES , STRAIN(MECHANICS) , SHEAR STRESSES , CRYSTAL DEFECTS


Distribution Statement : APPROVED FOR PUBLIC RELEASE