Pulse tailored laser welding has been applied to wrought, wrought grain-grown and cast Inconel 718 using a CO2 laser. Prior to welding, the material was characterized metallographically and the solid state transformation regions were identified with Differential Scanning Calorimetry. Bead on plate welds (restrained and unrestrained) were then produced using a matrix of pulse duty cycles and pulsed average power. Subsequent characterization included heat affected zone width, penetration and underbead width, the presence of cracks, microfissures and porosity, fusion zone curvature, and precipitation and liquated region width. Pedigree welding on three selected processing conditions was shown by microstructural and dye penetrant analysis to produce no microfissures, a result which strongly indicates the viability of pulse tailored welding for microfissure-free IN 718.
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ICALEO '90: Proceedings of the Laser Materials Processing Conference
November 4–9, 1990
Boston, Massachusetts, USA
ISBN:
978-0-912035-42-0
PROCEEDINGS PAPER
The effect of laser pulse tailored welding on inconel 718
Mary Helen McCay;
Mary Helen McCay
Center for Laser Applications The University of Tennessee Space Institute
Tullahoma, Tennessee 37388 USA
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C. Michael Sharp;
C. Michael Sharp
Center for Laser Applications The University of Tennessee Space Institute
Tullahoma, Tennessee 37388 USA
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Michael G. Womack;
Michael G. Womack
Center for Laser Applications The University of Tennessee Space Institute
Tullahoma, Tennessee 37388 USA
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T. Dwayne McCay;
T. Dwayne McCay
Center for Laser Applications The University of Tennessee Space Institute
Tullahoma, Tennessee 37388 USA
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Naren B. Dahotre
Naren B. Dahotre
Center for Laser Applications The University of Tennessee Space Institute
Tullahoma, Tennessee 37388 USA
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Published Online:
November 01 1990
Citation
Mary Helen McCay, C. Michael Sharp, Michael G. Womack, T. Dwayne McCay, Naren B. Dahotre; November 4–9, 1990. "The effect of laser pulse tailored welding on inconel 718." Proceedings of the ICALEO '90: Proceedings of the Laser Materials Processing Conference. ICALEO '90: Proceedings of the Laser Materials Processing Conference. Boston, Massachusetts, USA. (pp. pp. 325-342). ASME. https://doi.org/10.2351/1.5058375
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