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Effect of Cr on the microstructure and oxidation properties of Co-Al-W superalloys studied by in situ environmental TEM

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Abstract Modern in situ oxidation processes can be observed down to the nanoscale using environmental transmission electron microscope (TEM), and this technology has been applied to conventional corrosion science to… Click to show full abstract

Abstract Modern in situ oxidation processes can be observed down to the nanoscale using environmental transmission electron microscope (TEM), and this technology has been applied to conventional corrosion science to provide more detailed intrinsic information on the oxidation properties of materials. The influence of chromium (0–10 at.%) addition on the microstructure and oxidation properties of a γ/γ′ two-phase Co82Al9W9-based superalloy was systematically investigated. The in situ oxidation behaviour of Cr-containing alloys was studied using environmental TEM, and the addition of moderate Cr amounts is suggested for the alloy design.

Keywords: environmental tem; oxidation properties; oxidation; microstructure oxidation

Journal Title: Corrosion Science
Year Published: 2019

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