Accession Number : ADA136589

Title :   Alloy Development, Processing and Characterization of Devitrified Titanium Base Microcrystalline Alloys.

Descriptive Note : Annual rept. Sep 82-Aug 83,

Corporate Author : NORTHEASTERN UNIV BOSTON MA BARNETT INST OF CHEMICAL ANALYSIS AND MATERIALS SCIENCE

Personal Author(s) : Whang,S H

PDF Url : ADA136589

Report Date : Dec 1983

Pagination or Media Count : 90

Abstract : New syntheses of devitrified Ti alloys as well as rapidly solidified microcrystalline Ti alloys have been made using novel additive elements (B, Si, Y, La Ce, etc.) and rapid quenching techniques. The glass forming property of binary and ternary alloys systems has been studied using a model based on a phenomenological approach. The extended solid solubility of the additives were determined by TEM. The microstructures of the DV as well as RS microcrystalline alloys have been investigated by AEM with respect to heat treatment conditions. The crystal structure, morphology and coarsening kinetics of the precipitate resulting from the heat treatment in the synthesized alloys have been studied by TEM, SEM, STEM, x-ray, EDXS and ELS. Mechanical properties such as microhardness and bend ductility were measured on the samples heat treated isothermally as well as isochronally. From the results, microstructure-mechanical property relationships have been found. (Author)

Descriptors :   *Titanium alloys, *Crystallization, *Vitreous state, Microstructure, Quick reaction, Synthesis(Chemistry), Solubility, Mechanical properties, Precipitates, Spectroscopy, Electron microscopy

Subject Categories : Properties of Metals and Alloys
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE