Accession Number : AD0438779


Title :   MATERIAL EVALUATION OF D6AC STEEL EXTRUSION MECHANICAL AND METALLURGICAL PROPERTIES OF,


Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX


Personal Author(s) : Pratt,W M


Report Date : 15 Apr 1964


Pagination or Media Count : 15


Abstract : Relatively uniform smooth tensile properties were obtained for the D6ac steel heat treated to 220240 KSI regardless of grain directionality or location in the extrusion. The ductility was somewhat lower in the transverse direction. At the 260-290 KSI strength level the junction of legs of the extrusion displayed the highest ultimate strength. While the ultimate tensile strengths of the two legs were comparable for both the transverse and longitudinal directions, higher yield strength and lower ductility were obtained for the transverse grain direction. The notch tensile strength of the extrusion in the longitudinal grain direction was equal to or slightly greater than the ultimate strength for both hea/ treat levels. For the transverse grain direction the notch tensile strength was equal to or slightly less than the ultimate strength. The notch strength obtained for the extrusion was less than that obtained for D6ac plate and forging at the corresponding strength levels. (Author)


Descriptors :   *EXTRUSION , MECHANICAL PROPERTIES , STEEL , TENSILE PROPERTIES , METALLOGRAPHY , HEAT TREATMENT , HARDNESS , DUCTILITY , GRAIN STRUCTURES(METALLURGY)


Distribution Statement : APPROVED FOR PUBLIC RELEASE