Failure of Fabricated Centrifugal Fan Impeller Disclosing Lamellar Tearing in In. M.S. Plate
The impeller of a 4 ft. diam extraction fan driven by a 120 hp motor at 1,480 rpm. disrupted suddenly. The majority of the vanes had become detached where they were welded to the plates. At other locations, separation of the vanes was accompanied by tearing of the adjacent plate, failure being initiated at the weld fillets of the inner end of the vanes. An unusual feature was that the blades disclosed regions having a pronounced striated and stepped appearance. The etched microstructure was typical of a low carbon rolled plate having the usual banded appearance. A cross section...
Failure of Fabricated Centrifugal Fan Impeller Disclosing Lamellar Tearing in In. M.S. Plate, ASM Failure Analysis Case Histories: Construction, Mining, and Agricultural Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.conag.c9001442
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