Effect of thermal processing practices on the properties of superplastic Al-Li alloys. Final report
The effect of thermal processing on the mechanical properties of superplastically formed structural components fabricated from three aluminum-lithium alloys was evaluated. The starting materials consisted of 8090, 2090, and X2095 (Weldalite(TM) 049), in the form of commercial-grade superplastic sheet. The experimental test matrix was designed to assess the impact on mechanical properties of eliminating solution heat treatment and/or cold water quenching from post-forming thermal processing. The extensive hardness and tensile property data compiled are presented as a function of aging temperature, superplastic strain and temper/quench rate for each alloy. The tensile properties of the materials following superplastic forming in two T5-type tempers are compared with the baseline T6 temper. The implications for simplifying thermal processing without degradation in properties are discussed on the basis of the results.
- Research Organization:
- Analytical Services and Materials, Inc., Hampton, VA (United States)
- OSTI ID:
- 5447965
- Report Number(s):
- N-94-14850; NASA-CR-4548; NAS-1.26:4548; CNN: NAS1-19399; RTOP 505-63-50-03
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM BASE ALLOYS
HEAT TREATMENTS
TENSILE PROPERTIES
LITHIUM ALLOYS
HARDNESS
PLASTICITY
PRECIPITATION HARDENING
PROGRESS REPORT
ALLOYS
ALUMINIUM ALLOYS
DOCUMENT TYPES
HARDENING
MECHANICAL PROPERTIES
360103* - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication