Superplastic forming of rapid solidification processed Al-4Li-0. 2Zr
Aluminum-4 wt pct lithium alloys are attractive as structural materials because they are 13 to 14 pct less dense and have 25 pct larger elastic moduli than high-strength 2XXX-and 7XXX-series aluminum alloys. These low-density alloys can be produced only by rapid solidification processing (RSP). Successful RSP of Al-4Li-0.2Zr, Al-4Li-1Mg-0.2Zr, and Al-4Li-1Cu-0.2Zr alloys with strengths similar to that of 7075-T76 has recently been demonstrated. Net-shaped processing techniques such as superplastic forming are capable of producing complex structural elements while minimizing usage of expensive material; thus, these techniques are particularly applicable to Al-Li alloys. The purpose of this study was to determine the conditions of strain rate and temperature under which RSP Al-4Li alloys could be superplastically formed.
- Research Organization:
- McDonnell Douglas Research Labs., P.O. Box 516, St. Louis, MO (US)
- OSTI ID:
- 7202567
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 18A:7; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101 -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
BUILDING MATERIALS
CHEMICAL PREPARATION
FABRICATION
LITHIUM ALLOYS
MATERIALS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLASTICITY
SOLIDIFICATION
STRAIN RATE
SYNTHESIS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
ZIRCONIUM ALLOYS