Diffusion Bonding of Laser Surface Melted Nickel Alloy Material |
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| Authors: | Wayne Reitz Narendra B. Dahotre |
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| Affiliation: | a Babcock and Wilcox Lynchburg, VAb Center for Laser Applications Department of Materials Science and Engineering, University of Tennessee Space Institute, TN |
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| Abstract: | Diffusion bonding studies were performed on Laser Surface Melted (LSM) Ni-Cr-Fe material. LSM generates metastable microstructures with extended solid solution. The rapid quenching associated with LSM generates a zone that is void of intragranular precipitates, consists of well-defined grain boundaries via intergranular carbides, and contains fine-grained material. Grain growth across the bondlineand precipitate morphology were studied as a function of laser beam power (energy density) and bonding temperature. LSM at low energy density produced excellent grain growth across the bondline even when bonding at low temperature. |
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