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WJ Supplements - 2000
RESEARCH PAPERS
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Nondendritic equiaxed grain microstructures were simulated in Li-bearing Alloy 2195. BY A. Kostrivas And J. C. Lippold Published January 2000 The mechanical strain associated with hot cracking is significantly reduced with the introduction of a heat sink trailing a gas tungsten arc welding torch. BY Y. P. Yang, P. Dong, J. Zhang and X. Tian Published January 2000 The model shows droplet transfer strongly influences the flow pattern within the gas metal arc weld pool. BY M. H. Davies, M. Wahab and M. J. Painter Published January 2000 Improvement of mechanical properties was achieved by a reinforcement composed of a system of parallel wires. BY B. Zorc and L. Kosec Published January 2000 A neural network model is developed to improved the accuracy of current models of Ferrits Number prediction. BY J. M. Vitek, et al. Published February 2000 The accuracy of a newly developed neural network model is tested and shows good results. BY J. M. Vitek, et al. Published February 2000 A critical assessment of published stress formulas for spot welding is made. BY D. Radaj Published February 2000 An answer to the critical assessment by Radaj. BY S. Zhang Published February 2000 A basicity index for a flux cored electrode was developed, taking into consideration the metal sheath, fill ingredients and weld metal composition. BY E. Baune, C. Bonnet and S. Liu Published March 2000 The prediction model is verified by experimental results. BY E. Baune, C. Bonnet and S. Liu Published March 2000 Magnetically supported laser beam welding features increased process stability. BY M. Kern, P. Berger and H. Hugel Published March 2000 Welding even thick sections of low-carbon-equivalent steels without costly preheat seems to be a real possibility by following the recommendation of this study. BY A. J. Kinsey Published April 2000 The weld pool, keyhole and plume generated by a laser beam were analyzed with a dual camera system to help predict penetration and control the process. BY R. K. Holbert, et al. Published April 2000 A three-dimensional heat transfer model was developed to improve the prediction of temperature, themal cycles and size of die fusion zone in a gas tungsten arc weld on titanium. BY Z. Yang, et al. Published April 2000 An in-depth study of grain boundary liquation during gas metal arc welding aluminum offers insight into the prevention of hot cracking. BY C. Huang and S. Kou Published May 2000 A finite element model is developed to predict melting efficiency as it relates to process variables. BY E. A. Bonifaz Published May 2000 A way of evaluating Marangoni convection in a weld pool was devised by substituting the arc with a laser beam defocused to the size of an arc. BY C. Limmaneevichitr and S. Kou Published May 2000 In an effort to better understand reheat cracking, specimens were reheated to various postweld heat treatment temperatures and a strain to cause yielding was applied. BY I. Li, et. al. Published June 2000 Research into the effect of high-gravity, buoyancy-diven flow on weld pool size and shape improves our understanding of weldability. BY D. K. Aidun, et al. Published June 2000 A new sensing system that images the front and back of the weld pool was tested with bead-on-plate welding. BY S. B. Chen, et al. Published June 2000 A predictive model and control scheme for gas tungsten arc welding of a butt joint were developed to control the width and shape of the weld pool. BY S. B. Chen, et al. Published June 2000 The effect of force change on spot weld quality is investigated under various welding conditions. BY H. Tang, et. al. Published July 2000 The influence on mechanical porperties of segregated particles of aluminum oxide trapped in friction-welded joints is examined. BY K Uenishi, et. al. Published July 2000 The mechanisms of cracking and crack heading are analyzed for spot-welded aluminum alloys. BY J. Senkara and H. Zhang Published July 2000 The microstructural changes and their relationship to welding parameters were examined for electron-beam welded magnesium plates. BY BY A. Munitz, et. al. Published July 2000 It is shown coohng rates for in-service welding of pipelines can be controlled by adjusting fluid properties and internal pressure conditions. BY R. J. Belanger And B. M. Patchett Published August 2000 A new model is developed to analyze electrode movement, dynamic resistance and changes in contact area for spot welding. BY X. Sun And P. Dong Published August 2000 Materials and processing requirements for successful brazing of ceramics were investigated. BY F. M Hosting, et al. Published August 2000 The relationship between weld pool shape and Peclet number was investigated to gain a greater understanding of weld pool convection. BY C. Linnnaneevichitr and S. Kou Published August 2000 A preliminary investigation evaluated the feasibility of joining laminated composites using cold-roll bonding followed by diffusion welding. BY J-G. Luo and V. L. Acoff Published September 2000 An analysis procedure was developed to study the electrical, thermal and mechanical aspects of projection welding. BY X. Sun Published September 2000 An extensive study into spectral phenomena leads to a model that correlates arc light radiation to welding variables. BY P.J. Li and Y. M. Zhang Published September 2000 A model is developed to predict tensile strength based on current variation during resistance brazing. BY K. Takeshita Published September 2000 An investigation into the microstructure at the fusion boundary leads to a better understanding of the cracking mechanism associated with dissimilar welds. BY T. W. Nelson, et al. Published October 2000 Welding consumables with minor levels of carbon were tested with the prospect of eliminating preheat and interpass requirements when welding high-strength low-alloy steels. BY D. W. Moon, R. W. Fonda and G. Spanos Published October 2000 Process variables as they affect submerged arc welding of pipe were studied and analyzed. BY V. Gunaraj and N. Murugan Published October 2000 The reaction between hydrogen in the arc and fluoride in the slag of experimental flux cored welding electrodes was evaluated for reducing hydrogen cracking. BY M. Matsushita and S. Liu Published October 2000 In an effort to find a reliable nondestructive test for titanium, the effects of carbon, oxygen, nitrogen and cooling rate on weld properties were studied. BY D. D. Harwig, et al. Published November 2000 Weld quality of butt-joint welds with beveled and square edges is investigated. BY S. Missori and A. Sill Published November 2000 An experiment was devised to tind ff surface-tension-driven convection can be used to increase weld penetration. BY C. Limmaneevichitr and S. Kou Published November 2000 Analytic models were developed to establish a relationship between process parameters and weld bead quality. BY V. Gunaraj and N. Murugan Published November 2000 The comparison of new equivalency formulae to existing formulae show improved accuracy in predicting microstructure of ferritic and martensitic stainless steel welds. BY M. C. Balmforth and J. C. Lippold Published December 2000 A modification to the WRC- 1992 Diagram that takes into account martensite formation will allow the use of one diagram for FN prediction and dissimilar metal joining/cladding situations. BY D. J. Kotecki Published December 2000 Under different heat inputs and postweld heat treatments, a new alloy is tested against a standard alloy used in high-temperature applications. BY J. G. Nawrocki, et al. Published December 2000 A model is developed of the relationship between the bottom diameter of a keyhole and the size of the keyhole weld pool as recorded with an image sensing system. BY B. Zheng, et al. Published December 2000 |