SYMPOSIA PAPER Published: 01 January 1991

Reaction Sensitivities of Al-Li Alloys and Alloy 2219 in Mechanical-Impact Tests


Open-cup and pressurized mechanical impact tests were conducted at White Sands Test Facility (WSTF) on Al-Li alloys (2090, 8090, and WL049) and Al alloy 2219 in various tempers. Pressure, drop height (potential energy), and environment [gaseous (GOX) or liquid (LOX)] oxygen were variables in the test program.

Reactions were detected in all alloys. The reaction sensitivity varied with specimen absorbed energy. Large, macroreactions occurred on specimen shear lips, a region that has very high deformation and is exposed to striker pin-specimen friction. Small microreactions occurred over many areas of the specimen. The effects of the test variables (pressure, drop height, LOX, GOX) on the frequency of macro- and micro-reations are discussed. The energy for fracture is usually less than, or equal to, the energy for (oxygen) reaction.

Author Information

Simon, NJ
McColskey, JD
Reed, RP
Gracia-Salcedo, CM
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Developed by Committee: G04
Pages: 193–215
DOI: 10.1520/STP17764S
ISBN-EB: 978-0-8031-5170-3
ISBN-13: 978-0-8031-1461-6