THE CONSOLIDATION OF GAMMA-TITANIUM ALUMINIDE POWDERS

Authors
  1. Beddoes, J.
  2. Wallace, W.
  3. de Malherbe, M.C.
Corporate Authors
Carleton Univ, Ottawa ONT (CAN) Dept of Mechanical and Aerospace Engineering;Chief of Research and Development, Ottawa ONT (CAN) Director Research and Development Air;Institute for Aerospace Research, Ottawa ONT (CAN)
Abstract
The microstructural characteristics of Ti-54at%Al and Ti-48at%Al-2at%W were investigated by optical and scanning electron microscopy in order to elucidate the microstructural evolution occurring during powder manufacture. Both powder compositions were consolidated by HIP'ing in the temperature range 1025 to 1250C and the consolidated microstructures and hardness evaluated. The results show that a HIP temperature >1100C is necessary to eliminate all porosity. The HIP'ed compacts exhibit a non-uniform grain size which is associated with a varying volume fraction of dendrite regions in the powder. The hardness of the binary alloy is less than that of the ternary alloy. The hardness of both alloys decreases with increasing HIP temperature.
Date of publication
01 Jan 1992
Number of Pages
31
DSTKIM No
92-02428
CANDIS No
105303
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: