Rapid Solidification Processing of Al3Ti and Al3Ti Plus Copper.

Abstract

The development of advanced airframes and propulsion systems has generated significant research and development activity in the area of light weight, high temperature intermetallic alloys, e.g., alpha-two and gamma titanium aluminides. However, Al3Ti, an intermetallic which has a low density (3.35 gcm-3) and a high melting point (1350 deg C) hes received little scientific scrutiny, principally because of its intrinsically low ductility. In this study, X-ray diffraction, and optical and electron microscopy wre used to interrogate the microstructure oa Al3Ti and Al3Ti plus copper in their as-cast and melt spun conditions. Rapid solidification enhanced chemical uniformity and the addition of copper transformed the structure of Al3Ti from tetragonal DO22 into cubic Li2, a structure with a higher crystallographic symmetry.

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA236600

Entities

People

  • Harry Tyndall
  • John Benci
  • Joseph Zanter
  • William F. Frazier

Organizations

  • Naval Air Warfare Center Warminster

Tags

DTIC Thesaurus Topics

  • Airframes
  • Aluminides
  • Diffraction
  • Electron Microscopy
  • High Temperature
  • Low Density
  • Melting Point
  • Microscopy
  • Microstructure
  • Propulsion Systems
  • Solidification
  • Titanium
  • Titanium Aluminide
  • Transition Temperature
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics