Archive for the “Manufacturing- Construction” Category

Analysis of a Ruptured Inergen Cylinder SUMMARY: A ruptured Inergen cylinder was received for analysis to determine the cause of failure.  Results indicate the rupture initiated at a longitudinal alignment of several pre-existing axial cracks on the interior of the cylinder.  The pre-existing cracks were characterized by black oxide covered, arc-shaped crack fronts, initiating from […]

  Analysis of CORRODED STAINLESS STEEL BOLTS Summary: Metallurgical Technologies, Inc. (MTi) received five stainless steel bolts from a marine environment. The bolts exhibited corrosion predominantly on the head of the bolt around the set screw, underneath the head of the bolt, and in the threads. MTi was requested to determine the cause of the […]

Analysis Of A Fractured Crane Frame Weldment Summary: A fractured weldment from a crane frame assembly was received for analysis to determine the cause of fracturing along the circumferential fillet weld. Results indicate the fracture occurred by cyclic fatigue crack growth that initiated at the root of the fillet weld due to incomplete penetration by […]