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Alexander M. Rubenchik
Researcher at Lawrence Livermore National Laboratory
Publications - 318
Citations - 20102
Alexander M. Rubenchik is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Laser & Laser ablation. The author has an hindex of 57, co-authored 315 publications receiving 17248 citations. Previous affiliations of Alexander M. Rubenchik include Russian Academy of Sciences & University of California, Davis.
Papers
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Journal ArticleDOI
Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones
TL;DR: In this paper, the effect of the recoil pressure and Marangoni convection in laser powder bed fusion (L-PBF) of 316L stainless steel was demonstrated. And the results were validated against the experiments and the sensitivity to laser absorptivity was discussed.
Journal ArticleDOI
Nanosecond-to-femtosecond laser-induced breakdown in dielectrics
Brent C. Stuart,Michael D. Feit,S. Herman,Alexander M. Rubenchik,Bruce W. Shore,Michael D. Perry +5 more
TL;DR: A decreasing threshold fluence is found associated with a gradual transition from the long-pulse, thermally dominated regime to an ablative regime dominated by collisional and multiphoton ionization, and plasma formation.
Proceedings Article
Laser-induced damage in dielectrics with nanosecond-to-subpicosecond pulses
TL;DR: The application of chirped-pulse amplification to shortpulse lasers has led to a dramatic increase in the number of high-power sub-picosecond laser systems.
Journal ArticleDOI
Laser-Induced Damage in Dielectrics with Nanosecond to Subpicosecond Pulses
TL;DR: A theoretical model based on electron production via multiphoton ionization, Joule heating, and collisional (avalanche) ionization is in good agreement with experimental results.
Journal ArticleDOI
Observation of keyhole-mode laser melting in laser powder-bed fusion additive manufacturing
Wayne E. King,Holly D. Barth,Victor Castillo,Gilbert F. Gallegos,John W. Gibbs,John W. Gibbs,Douglas E. Hahn,Chandrika Kamath,Alexander M. Rubenchik +8 more
TL;DR: In this article, the experimental observation of keyhole-mode laser melting in a laser powder-bed fusion additive manufacturing setting for 316L stainless steel is presented, and the conditions required to transition from conduction controlled melting to keyholemode melting are identified.