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), Vol. 18A:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
FABRICATION
PLASTICITY
LITHIUM ALLOYS
ZIRCONIUM ALLOYS
BUILDING MATERIALS
CHEMICAL PREPARATION
SOLIDIFICATION
STRAIN RATE
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
ALLOYS
MATERIALS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SYNTHESIS
360103* - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360104 - Metals & Alloys- Physical Properties