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  • Portable Hardness Test Technology for Assessing Titanium Weld Quality (.pdf)
    bead and heat affected zone (HAZ) results in surface oxidation. Excessive surface oxi-. dation produces welds with poor fatigue strength and fracture toughness. Weld colors indicate that inert gas shielding during welding was somehow compromised. It is well. understood that weld color(1) indicates
  • Combustible Gas Detector Sensor Drift: bead combustible sensor
    are present. with water and form enough acid on basic. temperature, producing a resistance change. within the gas sample, then energy reaching. sensor elements to attack weld joints and. that results in bridge imbalance. The inactive. the detector is the same. If, however, some. base metal components
  • Weldability and Corrosion Studies of AISI 316L Electropolished Tubing (.pdf)
    the crevices (and potential for crevice corrosion) common with mechanical couplings. Unacceptable weld characteristics include bead meander, oxidation, and slag formation. There are also cosmetic geometric issues, such as weld bead width and height. Weldability and Corrosion Studies of AISI 316L
  • Laser Cutting and Welding of Copper (Cu) and Copper Alloys
    working with copper due to the fact that the molten weld bead becomes very highly reflective resulting in reflected power being transferred back into the laser. A series of 20mm long rectangular cuts were made at various laser parameters and a range of cut speeds. Due to fit up issues
  • Flux Coated / Stick
    and molten weld pool. The flux also forms a slag that protects the cooling weld pool or braze joint. The slag must be chipped or brushed off the weld bead after welding. The flux coating also provides a method of adding scavengers, deoxidizers, and alloying elements to the weld metal.
  • Depressed Center Grinding Wheels
    the workpiece and wheel center. ANSI type 28 wheels project out in front of the wheel center toward the workpiece. Depressed center grinding wheels are applied in the rough offhand-grinding or snagging of castings, weld beads, and flash or parting lines or defects in metal parts.
  • Fiber Laser Welding of 0.5 mm Thick Stainless Steel
    . Metallographic examination of these welds shows them to be very high quality with very smooth spatter-free top beads. Weld shape is shown to be controlled primarily by weld speed. 1997 Profile. Fiber Laser welding of 0.5 mm thick Stainless Steel. Summary. Keyhole welding. Fiber lasers are penetrating
  • Examining the corrosion resistance of chromium-passivated stainless-steel tubes
    , such as weld bead and heat-affected zones (HAZs). This results in metallic particle generation at susceptible points. Thus, corrosion-induced particles generated at the wetted surfaces of the electropolished tubes affect halogen's point-of-use purity. Recently, chromium-rich oxide passivation (CrP
  • Laser Spot Welding of Copper to Stainless Steel
    work is required to quantify joint. fact that the molten weld bead becomes very. strength. highly reflective resulting in reflected power. being transferred back into the laser. Experimental Procedure: A series of spot welds were made to weld 0.1 mm. thick Copper to 0.15 mm thick type, 304
  • Destructive Quality Testing of Welded Steel Tube (.pdf)
    may fail while a larger one further in. from the edge does not. Which defect is most critical? Deep scarfing may reduce the. wall thickness causing a weld area failure. Conversely, high weld bead may reinforce a. weak weld and allow it to pass. Also, if the bead is left in place during the test

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