ISSN: 0090-3973
Page Count: 8

Laser-Heating-Induced Failure of Metal Alloys Under Constant Stress
McLellan, DL
Specialist engineer, The Boeing Commercial Airplane Co., Wash.

Abstract

The failure conditions of three structural materials have been investigated under a number of constant axial tensile stresses and rapid heating rates. Laser heating was used to produce failure by fracture for selected times between nominally 0.10 and 100 s. The three sheet gage materials tested were 2024-T81 (alclad), Ti-6Al-4V (mill annealed), and 301 stainless steel (hard). Properties determined in this manner are applicable to vulnerability analyses of aircraft and missile structures. Temperatures for 1-s failure times of constantly stressed parts are significantly higher than those which accompany both the static ultimate tensile strength and long-duration creep rupture behaviors.

Keywords:
laser heating, construction materials, stresses, fractures (materials), failure, aluminum alloys, titanium alloys, iron alloys, axial stresses, tensile stresses, tensile strength, creep rupture strength, pseudo creep

Paper ID: JTE11677J
DOI: 10.1520/JTE11677J
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