Accession Number : AD0638620

Title :   EFFECT OF TUNGSTEN COMPOSITION ON THE MECHANICAL PROPERTIES ON THEW-NI-FE HEAVY ALLOY.

Descriptive Note : Interim scientific rept.

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB

Personal Author(s) : O'Neil,Joseph W. ; Salyer,Phillip N.

Report Date : DEC 1965

Pagination or Media Count : 37

Abstract : The ductility and strength of W-Ni-Fe composites over a wide range of volume % W was investigated at room temperatures. A series of composites was prepared (40% W to 95% W), sintered in the presence of the liquid phase and tested in tension. The sources of strength and ductility of the W-Ni-Fe composite was determined as related to the measured dihedral angle, mean particle diameter, tungsten mean free path, tungsten contiguity and volume % W. Similar stress-strain curves were obtained for all specimens tested which showed liquid phase sintered microstructure. These test results indicate that the volume % has very little effect upon the composite strength. For W-Ni-Fe composites where the tungsten mean free path is greater than the measured particle diameter (approximately 85% to 96% W), the maximum strain and maximum stress at necking dropped off rapidly. (Author)

Descriptors :   (*POWDER ALLOYS, *TUNGSTEN ALLOYS), IRON ALLOYS, NICKEL ALLOYS, MECHANICAL PROPERTIES, DUCTILITY, MICROSTRUCTURE, SOLID SOLUTIONS, TENSILE PROPERTIES, STRESSES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE