Accession Number : AD0430902


Title :   DEFORMATION CHARACTERISTICS OF THIN FOILS AND COMPOSITES.


Descriptive Note : Final rept.,


Corporate Author : FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT


Personal Author(s) : Lawley,Alan ; Gaigher,Horace L ; Schuster,Sidney


Report Date : Jan 1964


Pagination or Media Count : 81


Abstract : The tensile behavior of copper foils prepared from rolled bulk material has been studied over the thickness range 2 to 53 microns, and for a wide range of grain sizes. For foils of comparable grain size, yield strength increases with decreasing foil thickness t below about 26 microns, with a corresponding decrease in ductility. Glide dislocation configurations in zone melted single crystals of molybdenum, deformed in tension at temperatures in the range 4.2 to 300 K, have been examined by thin film electron transmission microscopy. The slip band structure is characterized by long primary screw dislocations. Consistent with the presence of secondary slip, the bulk stress-strain curves do not exhibit a region of easy glide. (Author)


Descriptors :   *FOILS(MATERIALS) , *METALS , DEFORMATION , COPPER , GOLD , IRON , MOLYBDENUM , SILVER , THICKNESS , CREEP , CRYSTAL DEFECTS , GRAIN STRUCTURES(METALLURGY) , CRYSTAL STRUCTURE , COLD WORKING , CRYOGENICS , ELECTRON MICROSCOPY


Distribution Statement : APPROVED FOR PUBLIC RELEASE