Hip Consolidation of Aluminum-Rich Intermetallic Alloys and Their Composites
Abstract
The near-net-shape processing of structural materials for application in advanced airframes and propulsion systems is of significant technological Interest. The hot isostatic press (HIP) is considered an enabling technology for consolidating costly and difficult to melt-process intermetallics and intermetallic matrix composites (IMC). Concomitant with the development of HIP technology for IMC's is the formulation of intelligent processing of materials (IPM) concepts and technology. There has been 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)), a high elastic modulus (170 GPa), and a high melting point (1350 deg C) has received little scientific scrutiny, principally because of its Intrinsically low ductility 1,2. Currently, research efforts are In progress examining the affects of rapid solidification, alloy chemistry, and consolidation processing on toughening. Rapid solidification enhances chemical uniformity and the addition of copper transforms the structure of Al3Ti from tetragonal DO22 into cubic Lt2, a structure with a higher crystallographic symmetry. This paper describes preliminary work directed towards utilizing HIP technology to consolidate aluminum-rich intermetallics and aluminum-rich IMCs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 03, 1992
- Accession Number
- ADA251429
Entities
People
- Mary E. Donnellan
- William E. Frazier
Organizations
- Naval Air Warfare Center Aircraft Divison