Evaluation of the Mechanical Properties of 2091 and 8090 Alloys
Abstract
This investigation was performed as part of an ongoing evaluation program by the Naval Air Development Center on advanced aluminum-lithium alloys. The Navy has considerable interest in aluminum-lithium alloys for aerospace applications. It is well known that the addition of lithium to aluminum decreases the density and increases the modulus of aluminum alloys. Due to these properties there may be significant weight savings achieved by using aluminum- lithium alloys in aircraft structure. The objective of this study was to evaluate the mechanical properties of two aluminum-lithium alloys, 2091-T351 and 8090T651. Both of these alloys are being considered as medium strength replacements for 2024. 8090 is desirable because it exhibits a lower density with improved static strength properties than those of 2024. Direct replacement of 2024 with 8090 would result in a 10% weight reduction because of the lower density. 2091 is attractive because it exhibits a lower density with improved strength, toughness and ductility than that of 2024. Keywords: Aluminum alloys; Lithium alloys; Ductility; Tensile strength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 21, 1988
- Accession Number
- ADA206785
Entities
People
- Mary E. Donnellan
Organizations
- Naval Air Warfare Center Warminster