WJ Supplements - 2007

RESEARCH PAPERS

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  • A New Proposal of HAZ Toughness Evaluation Method - Part 1: HAZ Toughness of Structural Steel in Multilayer and Single-Layer Weld Joints
    A method using single-layer welds proved useful for estimating HAZ toughness of construction structural steels.
    BY H. Furuya et al.
    Published January 2007
  • Measuring On-Line and Off-Line Noncontact Ultrasound Time of Flight Weld Penetration Depth
    A search was made to find a way to accurately predict liquation cracking in aluminum, with the idea in mind to develop or select effective filler metals.
    BY G. Cao and S. Kou
    Published January 2007
  • Effects of Fusion Zone Size and Failure Mode on Peak Load and Energy Absorption of Advanced High-Strength Steel Spot Welds
    Two advanced high-strength steels were studied to determine the critical fusion zone size for nugget pullout.
    BY X. Sun et al.
    Published January 2007
  • Tailoring Fillet Weld Geometry Using a Genetic Algorithm and a Neural Network Trained with Convective Heat Flow Calculation
    A real-number-based genetic algorithm and a neural network can be used to quickly determine the welding variable combinations needed to achieve a target gas metal arc fillet weld geometry.
    BY A. Kumar et al.
    Published January 2007

  • A Methodology for Prediction of Fusion Zone Shape
    A methodology was developed to predict fusion depth and width in gas metal arc welding.
    BY N. Okui et al.
    Published February 2007
  • A New Proposal of HAZ Toughness Evaluation Method: Part 2 - HAZ Toughness Formulation by Chemical Compositions
    Weld joints in structural steels were examined to determine HAZ toughness, then correlated to the steels' chemical composition.
    BYH. Furuya et al.
    Published February 2007
  • Technical Note: Martensite Formation in Austenitic/Ferritic Dissimilar Alloy Welds
    Concentration gradients were used to explain the differences in martensite layer widths in the partially mixed zone of dissmilar welds.
    BY J. N. DuPont and C. S. Kusko
    Published February 2007

  • Fabrication of a Carbon Steel-to-Stainless Steel Transition Joint Using Direct Laser Deposition - A Feasibility Study
    Laser Engineered Net Shaping was investigated as a means of producing a mechanically sound weld that functions in elevated-temperature service.
    BY J. D. Farren et al.
    Published March 2007
  • Influence of Lubricants on Electrode Life in Resistance Spot Welding of Aluminum Alloys
    A lubricant was found that almost doubles the electrode life of a nonlubricated surface.
    BY M. Rashid et al.
    Published March 2007
  • Estimation of Weld Quality in High-Frequency Electric Resistance Welding with Image Processing
    An algorithm was developed to use image data to predict spot weld quality.
    BY D. Kim et al.
    Published March 2007

  • Effects of Sheet Surface Conditions on Electrode Life in Resistance Welding Aluminum
    A study was conducted to systematically investigate the effects of aluminum sheet surface conditions on electrode life.
    BY Z. Li et al.
    Published April 2007
  • A Wavelet Transform-Based Approach for Joint Tracking in Gas Metal Arc Welding
    A new system based on charge-coupled device sensors was developed to effectively track weld joints.
    BY J. X. Xue et al.
    Published April 2007
  • A Look at the Statistical Identification of Critical Process Parameters in Friction Stir Welding
    A 16-run fractional factorial experiment was used to analyze the effects of nine friction stir welding input parameters on measured process outputs.
    BY J. H. Record et al.
    Published April 2007
  • Examination of Crater Crack Formation in Nitrogen-Containing Austenitic Stainless Steel Welds
    The effect of nitrogen addition on the tendency for crater cracks to develop was evaluated.
    BY D. D. Nage and V. S. Raja
    Published April 2007

  • Optimum Evaluation for Electron Beam Weldments of AZ61A-F Extruded Plates
    The electron beam process overcomes problems associated with welding magnesium.
    BY C. Chi et al.
    Published May 2007
  • Application of Magnetic Pulse Welding for Aluminum Alloys and SPCC Steel Sheet Joints
    The solid-state, heat-free characteristics of magnetic pulse welding make it an attractive process for joining dissimilar metals.
    BY T. Aizawa et al.
    Published May 2007
  • Weldability Evaluation of Supermartensitic Stainless Pipe Steels
    This study compares the mechanical properties of three supermartensitic pipe steels welded with different consumables and conditions.
    BY J. E. Ramirez
    Published May 2007
  • Prediction of Element Transfer in Submerged Arc Weldings
    Quadratic models developed in terms of flux ingredients help predict the transfer of certain elements into the weld pool.
    BY .P. Kanjilal et al
    Published May 2007

  • Pulse frequency affected the yield strength and fracture path of pulsed gas metal arc welded Al-Cu-Li specimens
    The electron beam process overcomes problems associated with welding magnesium.
    BY G. Padmanabham et al.
    Published June 2007
  • The Effect of Coatings on the Resistance Spot Welding Behavior of 780 MPa Dual-Phase Steel
    The steels showed similar overall welding behavior with both hotdipped galvanneal and galvanize coatings.
    BY M. Tumuluru
    Published June 2007
  • The Effect of Chromium on the Weldability and Microstructure of Fe-Cr-Al Weld Cladding
    The effect of chromium on the hydrogen cracking susceptibility of Fe-Al weld cladding was investigated.
    BY J. R. Regina et al.
    Published June 2007
  • Low-Speed Laser Welding of Aluminum Alloy 7075-T6 Using a 300-W, Single-Mode, Ytterbium Fiber Laser
    Use of an ytterbium fiber-optic laser was examined for low-speed keyhole welding of heat-treatable aluminum.
    BY A. G. Paleocrassas et al.
    Published June 2007

  • Comparison of Friction Stir Weldments and Submergedm Arc Weldments in HSLA-65 Steel
    Experimental trials indicated friction stir welding is a technically feasible process to join high-strength steel.
    BY P. J. Konkol et al.
    Published July 2007
  • Variable AC Polarity GTAW Fusion Behavior in 5083 Aluminum
    Penetration and bead width were shown to increase with the percentage of electrode positive polarity during unbalanced square wave AC welding
    BY M. A. R. Yarmuch et al.
    Published July 2007
  • Thermal Stresses in Butt-Jointed Thick Plates from Different Materials
    The slope of the material's connection plane with respect to the normal plane of the plate was studied for its effect on stress distribution< br/> BY Z. Abdulaliyev et al.
    Published July 2007
  • Examining the Bimetallic Joint of Orthorhombic Titanium Aluminide and Titanium Alloy (Diffusion Welding)
    Phase and structural transformations of diffusion welds were examined for factors responsible for joint quality.< br/> BY V. V. Rybin et al.
    Published July 2007

  • Computational Kinetics Simulation of the Dissolution and Coarsening in the HAZ during Laser Welding of 6061-T6 Al-Alloy
    Results showed it is possible to simulate the microstructure evolution and hardness in the HAZ of heat-treatable aluminum laser beam welds.
    BY A. D. Zervaki et al.
    Published August 2007
  • The Influence of Oxygen on the Nitrogen Content of Autogenous Stainless Steel Arc Welds
    The presence of oxygen in the shielding gas was shown to increase the weld metal nitrogen content, stabilize the arc, suppress degassing, and curb porosity.
    BY M. du Toit et al.
    Published August 2007
  • Double-Electrode GMAW Process and Control
    A novel welding process adds a GTAW torch to a conventional GMAW system to create a bypass arc for increased melting current and a controlled base current.
    BY K. H. Li et al.
    Published August 2007
  • A Look at the Optimization of Robot Welding Speed Based on Process Modeling
    An algorithm was designed to maintain complete joint penetration while maximizing productivity by using the fastest weld speed.
    BY M. Ericsson et al.
    Published August 2007
  • Repair Techniques for Fusion Reactor Applications
    Measurements were made of the effects of helium on the weldability of Types 304 and 316LN stainless steels.
    BY M. H. Tosten et al.
    Published August 2007

  • Simulation Study of a Hybrid Process for the Prevention of Weld Bead Hump Formation
    The addition of laser heat to the gas metal arc process was examined as a method to suppress deposit undulations.
    BY M. H. Cho and D. F. Farson
    Published September 2007
  • Failure of Welded Floor Truss Connections from the Exterior Wall during Collapse of the World Trade Center Towers
    Overload failure of truss connections in the WTC collapse went through the heat-affected zone of the base metal.
    BY S. W. Banovic and T. A. Siewert
    Published September 2007
  • Control of Diffusible Weld Metal Hydrogen through Flux Chemistry Modification
    Calcite and fluoride compounds were added to the flux composition to see their influence on hydrogen levels.
    BY J. du Plessis et al.
    Published September 2007
  • The Influence of Molybdenum on Stainless Steel Weld Microstructures
    A method of fusion welding superaustenitic stainless steels holds promise for circumventing corrosion and cracking problems.
    BY T. D. Anderson et al.
    Published September 2007

  • Response of Exothermic Additions to the Flux Cored Arc Welding Electrode - Part 1
    Exothermic reaction additions to the flux of FCAW consumable electrodes demonstrated significant increases in arc process efficiency.
    BY S. H. Malene et al.
    Published October 2007
  • Fusion-Boundary Macrosegregation in Dissimilar-Filler Welds
    Solidification and macrosegregation were studied in welds made with filler metals dissimilar in composition from the workpiece.
    BY S. Kou and Y. K. Yang
    Published October 2007
  • Improving Reliability of Heat Transfer and Materials Flow Calculations during Friction Stir Welding of Dissimilar Aluminum Alloys
    Temperature fields, cooling rates, tool torque, stir zone geometry, and magnesium concentration profiles were examined.
    BY R. Nandan et al.
    Published October 2007
  • Image Processing for Measurement of Three-Dimensional GTA Weld Pool Surface
    The algorithms used to process the image of a dot-matrix laser pattern reflected from the weld pool surface were examined.
    BY H. S. Song and Y. M. Zhang
    Published October 2007

  • Fusion-Boundary Macrosegregation in Dissimilar-Filler Metal Al-Cu Welds
    Two new mechanisms for fusion-boundary macrosegregation are proposed.
    BY Y. K. Yang and S. Kou
    Published November 2007
  • Sulfide-Induced Corrosion of Copper-Silver- Phosphorus Brazed Joints in Welding Transformers
    Extensive corrosion in leaking brazed joints was found to be the cause for failures in welding transformers.
    BY D. R. Sigler et al.
    Published November 2007
  • Response of Exothermic Additions to the Flux Cored Arc Welding Electrode - Part 2
    Stoichiometric mixtures were studied in self-shielded flux cored electrode formulations.
    BY S. H. Malene et al.
    Published November 2007 The Discontinuous Weld Bead Defect in High-Speed Gas Metal Arc Welds
    Causes and remedies for bead humping in gas metal arc welding are presented.
    BY T. C. Nguyen et al.
    Published November 2007
  • A PVD Joining Hybrid Process for Manufacturing Complex Metal Composites
    A hybrid brazing process allows the joining of very small and complex components.
    BY Fr.-W. Bach et al.
    Published December 2007
  • Weld-Bottom Macrosegregation Caused by Dissimilar Filler Metals
    Mechanisms are proposed to explain why severe macrosegration can occur when welding with filler metals dissimilar to the base metal.
    BY Y. K. Yang and S. Kou
    Published December 2007
  • Transferring Electron Beam Welding Parameters Using the Enhanced Modified Faraday Cup
    A diagnostic tool was proven useful in transferring beam parameters between different electron beam welding machines.
    BY T. A. Palmer et al.
    Published December 2007