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Meeting Materials Science & Technology 2017
Symposium Fifty Years of Metallography and Materials Characterization
Presentation Title Metallographic Analysis of Cu-Nb Nanolaminates Using Polarized Light Optical Microscopy
Author(s) Thomas Nizolek, Jacyln Avallone, Rodney McCabe, Nathan Mara, Irene Beyerlein, Tresa Pollock
On-Site Speaker (Planned) Thomas Nizolek
Abstract Scope Light optical microscopy would seem ill-suited for characterizing Cu-Nb nanolaminates due to the technique’s inherent resolution limit and the ultra-fine structure (<250 nm) of these layered materials. Yet despite the cubic crystal structures of both Cu and Nb, these nanolaminates polarize reflected light when the layer thickness is below approximately 100 nm. Due to this optical anisotropy, polarized light microscopy can be used to determine the layer orientation in deformed specimens and to characterize local deformation bands known as kink bands. Insights into the morphology of kink bands in Cu-Nb nanolaminates gained from polarized light optical microscopy and electron microscopy will be discussed, with particular emphasis on the geometry of kink band intersections and terminations. These metallographic observations suggest that kink bands form via nucleation at a stress concentration followed by propagation across the specimen - a mechanism that is confirmed using in-situ imaging of compression specimens.
Proceedings Inclusion? Planned: Publication outside of MS&T


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Improving the Precision of Microindentation Hardness Data
K-3: Automated Optical Microstructural Characterization of Thermal Spray Coatings
K-4: Advances in Automated Optical 3D Materials Characterization
Metallographic Analysis of Cu-Nb Nanolaminates Using Polarized Light Optical Microscopy
Microanalysis of Microscopy Evaluation of Mechanical Property Changes due to Low Temperature Thermal Treatment of a Steel
Microstructural Developments in Dual-phase and Advanced High Strength Steels
Next Step in Complex Microstructure Classification – How to Replace Subjective Expert Bias by 3D Information and Autonomous Procedures?
Oxidation Behavior of Tungsten Carbide-6% Cobalt Cemented Carbide
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Quantitative Microstructure Analysis by TriBeam Tomography
Three Dimensional (3D) Analysis of White Etching Regions in AISI M50 Bearing Steel

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