Fatigue Fracture of an Electron Beam Weld in the Web of a Steel Gear Because of Incomplete Fusion
A 9310 steel gear was found to be defective after a period of engine service. A linear crack approximately was discovered by routine magnetic-particle inspection of an electron beam welded joint that attached a hollow stub shaft to the web of the gear. The welding procedure had a cosmetic weld pass on top of the initial full-penetration weld. There were no other known service failures of gears were welded by this method. One zone of the welded joint showed incomplete fusion, surrounded by two zones containing fatigue beach marks This indicated that the incomplete-fusion zone was the site at...
Fatigue Fracture of an Electron Beam Weld in the Web of a Steel Gear Because of Incomplete Fusion, ASM Failure Analysis Case Histories: Mechanical and Machine Components, ASM International, 2019, https://doi.org/10.31399/asm.fach.mech.c0047710
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