Accession Number : ADA302046
Title : Microstructure, Fracture Characteristics, and Tensile Properties of Two Tungsten Heavy Alloys.
Descriptive Note : Final rept. Jan 92-Mar 93,
Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Personal Author(s) : Kennedy, Edward W.
PDF Url : ADA302046
Report Date : NOV 1995
Pagination or Media Count : 39
Abstract : The influence of microstructure on fracture behavior and tensile properties was investigated for two tungsten heavy alloys (93W-4.9Ni-2.1Fe and 91W-6Ni-3Co by weight-percentage) that are suitable materiai candidates for use as kinetic energy penetrators. Both alloys were evaluated in swaged and aged conditions. For comparable levels of swaging and aging, the W-Ni-Co alloy exhibited increased tensile strength and ductility compared to the W-Ni-Fe material. The W-Ni-Co alloy had a smaller average W grain size and a larger percentage of W in the matrix. Fracture surfaces of failed uniaxial tensile specimens tested at quasi-static and low-to-medium strain rates were characterized using scanning electron microscopy. The results indicate a strong relationship between microstructure, fracture behavior, and tensile properties as a function of alloy composition and strain rate. (MM)
Descriptors : *FRACTURE(MECHANICS), *KINETIC ENERGY PROJECTILES, *TUNGSTEN ALLOYS, *HEAVY METALS, TENSILE STRENGTH, SCANNING ELECTRON MICROSCOPES, MICROSTRUCTURE, AGING(MATERIALS), TENSILE PROPERTIES, GRAIN SIZE, ALLOYS, STRAIN RATE, ELECTRON MICROSCOPY, IRON, PENETRATION, NICKEL, DUCTILITY, COBALT, SINTERING, SABOTS, SWAGING.
Subject Categories : Properties of Metals and Alloys
Ammunition and Explosives
Distribution Statement : APPROVED FOR PUBLIC RELEASE