Tensile properties of commercial aluminum-lithium alloys at cryogenic temperatures. [AA 2090-T81 and AA 2091-T8 plate]
The mechanical properties of commercially available aluminum alloys at cryogenic temperatures have attracted increasing interest in the past few years because of the large number of potential aerospace applications, primarily in tankage for cryogenic fuels. Aluminum-lithium alloys are of particular interest because of their low density and the extremely good low temperature properties that have been measured to date. This paper compares the behavior of AA 2090-T81 plate and AA 2091-T8 plate, which has not previously been surveyed. The 2090 data include new results at 200 K that indicate that property trends are not monotonic with temperature. The 2091 results show a peak in properties between 77 K and 200 K. These data point to the hazards of doing property screening at 77 K rather than 4 K. They also suggest some avenues for further exploration of the mechanisms that control elongation and fracture toughness. 6 refs., 3 figs., 3 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 7128151
- Report Number(s):
- LBL-24987; CONF-8803135-1; ON: DE88014857
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cryogenic tensile properties of AA 2090 weldments
The Cryogenic Mechanical Properties of Vintage III Al-Cu-Li-Zr Alloy 2090-T81