WJ Supplements - 2002

RESEARCH PAPERS

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  • Development of Appropriate Resistance Spot Welding Practice for Transformation-Hardened Steels
    A temper diagram is developed to address the issue of holdtime sensitivity for resistance spot welding of high-strength steel.
    BY W. L. Chuko and J. E. Gould
    Published January 2002
  • A Study on the Modeling of Magnetic Arc Deflection and Dynamic Analysis of Arc Sensor
    A feedback signal from a magnetic field introduced into the arc may lead to improved sensing of arc variables.
    BY Y. H. Kang and S. J. Na
    Published January 2002
  • Stresses in Laser-Beam-Welded Lap Joints Determined by Outer Surface Strains
    A method to determine inaccessible stresses in a weldment uses strain gauges attached to the outer surfaces of a lap joint.
    BY S. Zhang
    Published January 2002


  • Design-of-Experiments Study to Examine the Effect of Polarity on Stud Welding
    A range of process, manufacturing, and materials variables are studied to evaluate their effect on the robustness of arc stud welding.
    BY S. R. Ramasamy, et al.
    Published February 2002
  • Retained Austenite as a Hydrogen Trap in Steel Welds
    A method of managing hydrogen in high-strength steel is investigated.
    BY Y. D. Park, et al..
    Published February 2002


  • Monte Carlo Simulation of Heat-Affected Zone Microstructure in Laser-Beam- Welded Nickel Sheet
    Predicted heat-affected grain growth displayed reasonable agreement with experimental results of metallographic examination.
    BY M.-Y. ki and E. Kannatoy-Asibu, Jr.
    Published March 2002
  • Prediction of Heat-Affected Zone Characteristics in Submerged Arc Welding of Structural Steel Pipes
    The importance of selecting appropriate process variables to achieve predictable and reproducible welds is demonstrated.
    BY V. Gunaraj and N. Murugan
    Published March 2002


  • Process Sensitivity of GMAW: Aluminum vs. Steel
    An investigation into the relative sensitivity to process variables between aluminum and steel reveals some interesting results.
    BY T. P. Ouinn
    Published April 2002
  • Welding Process Effects in Weldability Testing of Steels
    As part of a nationwide program to develop new highperformance steel, an investigation of hydrogen-induced cracking susceptibility was made using different welding processes.
    BY G. Atkins, et. al.
    Published April 2002


  • Statistical Process Design for Robotic GMA Welding of Sheet Metal
    A method is proposed to reduce welding time by increasing travel speed while retaining weld quality.
    BY T. T. Allen, et al.
    Published May 2002
  • SSegregation of Phosphorus and Sulfur in Heat-Affected Zone Hot Cracking of Type 308 Stainless Steel
    This study establishes sulfur to be a greater contributor to HAZ hot cracking than phosphorus.
    BY L. Li and R. W. Messier, Jr.
    Published May 2002


  • The Stress Field Characteristics in the Surface Mount Solder Joints under Temperature Cycling: Temperature Effect and Its Evaluation
    The temperature cycling history of a surface mount solder joint was taken into account in the analysis of dynamic stress distribution.
    BY Y. Y. Qian, X. Ma, and F. Yoshida
    Published June 2002
  • A Study of Weld Pore Sensitivity of Self-Shielded, Flux Cored Electrodes
    Both nitrogen and oxygen were found to greatly influence porosity formation in self-shielded flux cored welding.
    BY O. Wei, O. Hu, F. Guo, and D. J. Xiong
    Published June 2002
  • Fume Model for Gas Metal Arc Welding
    A model intermediate between theoretical and empirical was developed to predict fume generation from the globular and spray transfer modes.
    BY C. J. Redding
    Published June 2002
  • Primary Circuit Dynamic Resistance Monitoring and its Application to Quality Estimation during Resistance Spot Welding
    A weld monitoring system was developed to analyze weld strength and nugget diameter.
    BY Y. Cho and S. Rhee
    Published June 2002


  • ANSl/AWS A5.1-91 E6013 Rutile Electrodes: The Effect of Calcite
    A program is undertaken to discover fundamental knowledge about rutile covered electrodes.
    BY N. M. R. DE Rissono et al.
    Published July 2002
  • Selecting Parameters for GMAW Using Dimensional Analysis
    A relationship between process variables and the desired operating conditions was established by regression and dimensional analysis.
    BY P. E. Murray
    Published July 2002
  • Alloying and Microstructural Management in Developing SMAW Electrodes for HSLA-IO0 Steel
    Three sets of experimental electrodes shed light on attaining the best performance for joining high-strength steel.
    BY W. Wang and S. Liu
    Published July 2002


  • The Development of New Silver-Free Brazing Alloys for Steel Tubular Assembly
    A cost-efficient, silver-free alloy meets the tensile and fatigue requirements for joining high-strength bicycle frames.
    BY D. M. Jacobson at el.
    Published August 2002
  • The Effect of Ferro-AIIoy Additions and Depth on the Quality of Underwater Wet Welds
    Testing of various experimental electrodes for underwater welding sheds light on improving quality at increased depths.
    BY M. D. Rowe et el.
    Published August 2002
  • Joining Depleted Uranium to High-Strength Aluminum Using an Explosively Clad Niobium Interlayer
    Process parameters and joining techniques are investigated for joining a uranium alloy to high-strength aluminum.
    BY J. W. Elmer at el.
    Published August 2002
  • Estimation and Prediction of HAZ Softening in Thermomechanically Controlled-Rolled and Accelerated-Cooled Steel
    The causes of heat-affected zone softening in fine-grained, ferritic-pearlitic steel are examined.
    BY K.-S. Bang and W.-Y. Kim.
    Published August 2002


  • Joining Using Semisolid Metals
    A unique use of a semisolid slurry as a filler metal to join aluminum offers an equiaxed microstructure, high deposition, and no fumes or spatter.
    BY P. F. Mendez et al.
    Published September 2002
  • Weldability Testing of Dissimilar Combinations of 5000- and 6000- Series Aluminum Alloys
    Cracking susceptibility of similar and dissimilar aluminum alloys joined by gas tungsten arc welding was determined.
    BY M. M. Mossman et al.
    Published September 2002
  • Investigation of Monitoring Systems for Resistance Spot Welding
    Sensor systems that provided information on nugget formation were studied for accuracy.
    BY C.-S. Chien et al.
    Published September 2002


  • Aging of Brazed Joints- Interface Reaction in Base Metal/Filler Metal Couples -- Part 1: Low-Temperature AG-Cu-Ti Filler Metal
    The effects of aging were studied in brazed joints made of alloys used in advanced heat engines.
    BY R T. Vianco et al.
    Published October 2002
  • Liquation Mechanisms in Multicomponent Aluminum Alloys during Welding
    Three liquation mechanisms were found to cover nearly all wrought aluminum alloys.
    BY C. Huang and S. Kou
    Published October 2002
  • Dual Beam Laser Welding
    Weld quality significantly improved when a 6-kWr CO 2 laser beam was split into two equal-power beams located in tandem during welding.
    BY J. Xie
    Published October 2002


  • The Effect of Multiple Postweld Heat Treatment Cycles on the Weldability of Waspaloy┬«
    Postweld heat-treatment cycles were simulated to study the effect on liquation cracking susceptibility in the heat-affected zone.
    BY M. Oian and J. C. Lippold
    Published November 2002
  • Microstructual Variations in a High-Strength Structural Steel Weld under Isoheat Input Conditions
    Microstructural variations and their relationship to heat input and welding parameters were studied as they related to mechanical properties.
    BY B. Basu and R. Raman
    Published November 2002
  • Keyhole Double-Sided Arc Welding Process
    Narrow-groove welding of thick sections was accomplished with two opposing torches.
    BY Y. M. Zhang et al.
    Published November 2002
  • SAging of Braze Joints: Interface Reactions in Base Metal/Filler Metal Couples, Part Il: High-Temperature Au-Ni-Ti Braze Alloy
    The mechanical performance of a brazing alloy shows promise for applications where long-term aging and exposure to elevated temperatures are factors
    BY P. T. Vianco et al.
    Published November 2002


  • Determination of Gradients in Mechanical Properties of 2.25Cr-1 Me Weldments Using Shear-Punch Tests
    Individual microstructural regions in the heat-affected zone were more accurately identified with a new test technique.
    BY V. Karthik at el.
    Published December 2002
  • Numerical Simulation of Sleeve Repair Welding of In-Service Gas Pipelines
    Flow rate effect on HAZ hardness, risk of melt through, residual stress and plastic strain distribution were all evaluated in developing a model to predict in-service repair of pipelines.
    BY I.-W. Bang et al.
    Published December 2002
  • Weld Morphology and Thermal Modeling in Dual-Beam Laser Welding
    A mathematical model helps to define the heat flow patterns with dual-beam laser welding.
    BY I.-W. Bang et al.
    Published December 2002
  • Chloride Contributions in Flux-Assisted GTA Welding of Magnesium Alloys
    A variety of chloride fluxes were tested to ascertain their influence on arc voltage, arc temperature, and joint penetration.
    BY M. Marya et el.
    Published December 2002

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