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

Abstract

The effect of rapid solidification on solid solubility, microstructural refinement and phase transformation in binary and ternary titanium alloys was studied. The stability of the refined microstructures produced by rapid quenching were investigated under the isothermal and isochronal conditions. In particular, Ostwald ripening of rare earth (Y, La, Er) and Thorium dispersoids in Ti-Sn-X (Y, La, Er, Th) systems at elevated temperatures (700-900 C, phase) was investigated by transmission electron microscopy and image analyzer. The grain growth rate at the presence of the rare earth and Th dispersoids was investigated and determined as a function of time. The deterioration of microhardness in the ternary alloys containing rare earth dispersions upon high temperature annealing was studied in relation to microstructural coarsening. Keywords: Grain structures(Metallurgy); Binary alloys; Titanium alloys; Microstructure; Arc melt spinning; Ostwald ripening of rare earth dispersoids, Age hardening; Alpha Titanium alloys, High temperature alloys.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA172140

Entities

People

  • Sung H. Whang

Organizations

  • Northeastern University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Reactions
  • Chemistry
  • Fiber Spinning
  • Grain Growth
  • Hardness
  • Heat Energy
  • Heat Treatment
  • High Temperature
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Phase Diagrams
  • Rare Earth Elements
  • Solid Solutions
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics