NIST Special PublicationThe Institute, 2002 |
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Page 5
... calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost- effective , spatter free , high quality welds . OBJECTIVE ...
... calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost- effective , spatter free , high quality welds . OBJECTIVE ...
Page 7
... calculation of the standard deviation and coefficient of variation . Pulsed Current Signal A typical pulsed current ... calculated by dividing area of waveform under one pulse by pulse cycle time . Statistical analysis was carried out ...
... calculation of the standard deviation and coefficient of variation . Pulsed Current Signal A typical pulsed current ... calculated by dividing area of waveform under one pulse by pulse cycle time . Statistical analysis was carried out ...
Page 11
... calculated ( Table 1 ) for four types droplet detachments , namely , one droplet detachment during peak duration ( Region - 1 ) , one droplet detachment during background duration ( Region - 2 ) , two droplets detachment during peak ...
... calculated ( Table 1 ) for four types droplet detachments , namely , one droplet detachment during peak duration ( Region - 1 ) , one droplet detachment during background duration ( Region - 2 ) , two droplets detachment during peak ...
Page 17
... calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost - effective , spatter free , high quality welds . Among ...
... calculated . The optimum GMAW - P was selected by choosing the pulse parameter which resulted in the least standard deviation and the coefficient of variation , to produce cost - effective , spatter free , high quality welds . Among ...
Page 25
... calculation ) is nearly the same as that of a sine wave pulse ( 500 Hz ) . Compared with the droplet oscillation , the sine wave current has just two and a half cycles . Therefore , in this case , the droplet can oscillate only twice ...
... calculation ) is nearly the same as that of a sine wave pulse ( 500 Hz ) . Compared with the droplet oscillation , the sine wave current has just two and a half cycles . Therefore , in this case , the droplet can oscillate only twice ...
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Common terms and phrases
algorithm analysis angular distortion arc length arc voltage average current background duration boundary butt weldment calculated camera coefficient of variation detachment during peak developed droplet detachment dynamic effect electrode equation experimental Figure filler metal Friction Stir Welding geometry GMAW GMAW-P GTA weld GTAW hoop stress increase interface keyhole laser machine vision martensite material measured mechanical melting metal arc welding method microstructure mm/min mm/s mode molten pool monitoring NIST oscillation frequency peak duration penetration plasma arc welding plate predicted procedure pulsed current resetting residual stress robot rotational sensor shear stress shown in Fig splash strain structure surface technique Technology thermal types of droplet variation VPPAW waveform weld diameter weld fixture weld joint weld pool weld quality welding current Welding Journal welding parameters welding power supply welding process welding simulation welding speed width wire feed speed workpiece zone
Popular passages
Page ii - Certain commercial equipment, instruments, or materials are identified in this paper in order to adequately specify the experimental procedure. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.
Page 94 - Proceedings of the institution of Mechanical Engineers; Part B: Journal of Engineering Manufacture, Vol. 207, pp.9- 1 4, 1 993 [4] Soar RC and Dickens, PM, "Design of Laminated Tooling for High Pressure Die -Casting," Proceedings-SPIE The international society for Optical Engineering, pp.
Page 123 - Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy.