Dr. David B. Witkin Profile

Dr. David B. Witkin

at Aerospace Corp

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 4 March 2022 Presentation + Paper

Effect of test temperature and strain rate on elevated temperature tensile tests of Inconel 718 prepared by selective laser melting

Tait McLouth, David Witkin, Julian Lohser, Scott Sitzman, Paul Adams, Glenn Bean, Jenn-Ming Yang, Rafael Zaldivar

Proceedings Volume 11992, 1199205 (2022) https://doi.org/10.1117/12.2613475

KEYWORDS: Oxidation, Heat treatments, Diffusion, Scanning electron microscopy, Additive manufacturing

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Proceedings Article | 26 February 2018 Paper

The effect of laser focus and process parameters on microstructure and mechanical properties of SLM Inconel 718

Glenn Bean, David Witkin, Tait McLouth, Rafael Zaldivar

Proceedings Volume 10523, 105230Y (2018) https://doi.org/10.1117/12.2299615

KEYWORDS: Surface roughness, Laser processing, Laser energy, Heat treatments, 3D modeling, Additive manufacturing, Nickel, Metals

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Proceedings Article | 6 April 2016 Paper

Laser post-processing of Inconel 625 made by selective laser melting

David Witkin, Henry Helvajian, Lee Steffeney, William Hansen

Proceedings Volume 9738, 97380W (2016) https://doi.org/10.1117/12.2213745

KEYWORDS: Surface roughness, Spatial light modulators, Laser processing, Surface finishing, Amplitude modulation, Polishing, Additive manufacturing, Modulation, Pulsed laser operation, Oxides, Continuous wave operation

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Proceedings Article | 16 March 2015 Paper

Microstructural evolution and mechanical behavior of nickel-based superalloy 625 made by selective laser melting

David Witkin, Paul Adams, Thomas Albright

Proceedings Volume 9353, 93530B (2015) https://doi.org/10.1117/12.2083699

KEYWORDS: Spatial light modulators, Particles, Silicon, Surface roughness, Solids, Niobium, Silicon carbide, Aerospace engineering, Heat treatments, Molybdenum

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Proceedings Article | 30 September 2013 Paper

Influence of low-earth orbit exposure on the mechanical properties of silicon carbide

David Witkin, Iwona Palusinski

Proceedings Volume 8837, 88370D (2013) https://doi.org/10.1117/12.2022212

KEYWORDS: Silicon carbide, Data modeling, Statistical analysis, Silicon, Statistical modeling, Aerospace engineering, Reflectors, Space telescopes, Space mirrors, Oxygen

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Proceedings Article | 22 August 2009 Paper

Material testing of silicon carbide mirrors

David Witkin, Iwona Palusinski

Proceedings Volume 7425, 742509 (2009) https://doi.org/10.1117/12.826363

KEYWORDS: Silicon carbide, Data modeling, Aerospace engineering, Fourier transforms, Data analysis, Statistical analysis, Failure analysis, Nondestructive evaluation, Mirrors, Reliability

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Proceedings Article | 15 September 2007 Paper

Development of a systematic approach to space qualification of silicon carbide for mirror applications

Iwona Palusinski, Isaac Ghozeil, Michael O'Brien, Jason Geis, David Witkin

Proceedings Volume 6666, 666608 (2007) https://doi.org/10.1117/12.741470

KEYWORDS: Silicon carbide, Ceramics, Nondestructive evaluation, Databases, Mirrors, Space mirrors, Manufacturing, Systems engineering, Coating, Systems modeling

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Showing 5 of 7 publications

Conference Committee Involvement (2)

Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems II

11 August 2015 | San Diego, California, United States

Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems

26 August 2013 | San Diego, California, United States

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