ASM Failure Analysis Case Histories: Air and Spacecraft
Breakage of Main Undercarriage Axle of Landing Gear System of an Aircraft Under Simulated Testing
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Published:2019
Abstract
One main undercarriage axle made of high strength alloy steel was subjected to simulated fatigue test for 6000 h of service. After only 300 h it broke in two along the sharp radius. The fracture revealed a coarse, irregular, and brittle surface before final fracture by thick angular shear lip zone. The presence of micropores in the cleavage facets as well as at the grain boundaries and hairline type crack indications under SEM examination were all suggestive of hydrogen embrittlement. On the basis of investigation results and observations, it was concluded that the transverse breakage of the axle had...
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Member Sign InA. K. Das, B. M. Thippeswamy, J. Prasad, Breakage of Main Undercarriage Axle of Landing Gear System of an Aircraft Under Simulated Testing, ASM Failure Analysis Case Histories: Air and Spacecraft, ASM International, 2019, https://doi.org/10.31399/asm.fach.aero.c9001555
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