Accession Number : AD0662871

Title :   SUPERALLOY FIBERS - MECHANICAL PROPERTIES VERSUS DRAWING TECHNIQUES.

Descriptive Note : Technical rept.,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Ross,Jack H.

Report Date : SEP 1967

Pagination or Media Count : 25

Abstract : An investigation was made of the mechanical properties of yarns formed by the modified Levi process (encasement of each fiber in a matrix followed by encasing the whole bundle in the same matrix) and the Air Force-Hoskins process (enclosure of the entire bundle of fibers in a dissimilar alloy ribbon). As a base point in evaluating the fiber and yarn mechanical properties, data on single-drawn superalloy fibers are analyzed for comparison. The results of this analysis reveal that the properties of two types of multidrawn yarns when formed from an alloy similar to Chromel R are very comparable. The major differences noted are that one (the modified Levi process 90 end yarn) has broken filaments which are tied into the structure by the use of excessive twist (up to 19 turns per inch) and the other (the Air Force-Hoskins process 100 end yarn) has some interfilament welding and a rough fiber surface which without a coating will cause abrasive action in the yarn and thus loss in strength. (Author)

Descriptors :   (*METALLIC TEXTILES, *FIBER METALLURGY), HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, MECHANICAL PROPERTIES, FIBERS, DRAWING(FORMING), CHROMIUM ALLOYS, NICKEL ALLOYS, COBALT ALLOYS, STAINLESS STEEL, MOLYBDENUM ALLOYS, TITANIUM ALLOYS, ALUMINUM ALLOYS, TUNGSTEN ALLOYS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE