Search Results for arc deposition
... by the submerged arc process with a backing strip. The backing was back gouged off, and the weld was completed from the inside with E8018-C3 electrodes by the shielded metal arc process. Striations of the type normally associated with progressive or fatigue-type failures including beach marks that allowed tracing...
... into a cylindrical case that were both welded to a flange. The case, stiffener, flange, and weld deposit were all of nickel-base alloy 718. It was observed that a manual arc weld repair had been made along almost the entire circumference of the original weld. Investigation (visual inspection, 0.5x macrographs...
... surface revealed a fatigue crack through about one-third of the cross section. A secondary fatigue crack, perpendicular to the main fracture, was also observed. The composition of the weld deposit corresponded to a heat treatable flux-cored arc welding filler material that was known to have been used...
...-rich ferrite bands. In comparing the two welding processes, it was determined that the flux used in submerged arc welding was high in silicon and that the large amount of weld metal deposited in a single pass remained molten long enough to dissolve much larger amounts of silicon than could...
.... 1c ) was initiated in a localized HAZ produced by feathering the weld, which left a thin deposit of weld metal on the upper edge of the rail. Cracks were also found in HAZs resulting from weld spatter ( Fig. 1d ). Additional macrographs revealed cracks in welds and in HAZs resulting from arcing...
... ions in the electrolyte. It is possible that the increasing thickness of the deposit was closing the gap between the electrodes, producing arcing that resulted in localized heating of the upper portion of the nickel anode. This phenomenon produced the interference colors and the chasing of the rubber...
... 0.02 bal 5183 specification (a) (b) 4.3–5.2 0.5–1.0 0.05–0.25 0.25 0.40 0.40 0.10 bal (a) Single values are maximums. Source: Ref 3 . (b) Filler metal for gas metal arc welding White deposits from the inside surface of the pipe/elbow section were dissolved in acid...
...Abstract Abstract The intermediate pressure (IP) turbine of a thermal generating station is driven by steam from the boiler's reheater. On one particular IP turbine, a thick deposit was found on the insides of the rotor blade shrouds in two instances two years apart. The source of the deposits...
... with a preheat of 65 °C (150 °F), with the heat applied only on the outside wall at point B. The weld was deposited using a single-head submerged arc process, and the failure occurred when 32 mm (1.25 in.) of weld depth had been laid. Sections through the failure revealed that the cracking had initiated...
... by the loosened ends of the strips. The bolt had fractured near the head, a location which probably coincided with the junction of the strips. A portion of the fracture surface was covered with copper that had been deposited in the molten state, while some was also present along the shank of the bolt, having...
... Handbook Viswanathan S. , Apelian D. , Donahue R.J. , DasGupta B. , Gywn M. , Jorstad J.L. , Monroe R.W. , Sahoo M. , Prucha T.E. , and Twarog D. , Ed., ASM International , 2008 , p 116 – 123 , 10.31399/asm.hb.v15.a0005200 96. Vacuum Arc...
... surface, which has a small kernel (arrow) at its center. This kernel appears as a circle on the surface and looks like a weld deposit. Stroking this kernel with a file showed it to be extremely hard, indicating that the kernel may have resulted from extreme localized overheating. It was learned...