Fracture of Tempered Leaf Springs
U-shaped leaf springs, intended to serve as spacers between oil tank floats and the inner walls of the containers, broke while being fitted, or after a short time in use, in the bend of the U. The springs were made of tempered strip steel of type C 88 with 0.84 % C, bent at room temperature, and electroplated with cadmium for protection against corrosion. Each fracture showed seven or eight kidney-shaped cracks. At the origins of these cracks on the concave inner surface of the springs, crater-like depressions and beads of melted and resolidified material were found. Fracture of...
Friedrich Karl Naumann, Ferdinand Spies, Fracture of Tempered Leaf Springs, ASM Failure Analysis Case Histories: Oil and Gas Production Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.petrol.c9001185
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