About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Deformation and Damage Mechanisms of High Temperature Alloys
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Presentation Title |
An In-situ SEM Elevated-temperature Investigation of Serrated Plastic Flow in a CoCrFeNiW-C Alloy
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Author(s) |
Shaolou Wei, Daniel P. Moriarty, Cem Tasan |
On-Site Speaker (Planned) |
Shaolou Wei |
Abstract Scope |
Multi-component Co-alloys are a class of promising metallic materials for high-temperature applications. Provided the fruitful screening of their yield strength preservation trend depending on different alloy design strategies, systematic understandings of their plastic deformation response are still in lack. The present work is focused on the plastic deformation mechanisms of a CoCrFeNiW-C alloy at 650 oC, with emphases on dislocation slip activities and serrated plastic flow features. By integrating high-temperature in-situ scanning electron microscopy-based tests, statistical analyses, and theoretical calculations, the following mechanistic insights will be discussed: (1) what causes the serrated plastic flow response and thereby the transition in its module? (2) what are the embedded dynamic features amongst the serration incidents? and (3) what kind of deformation substructures are associated with the serrated plastic flow? Quantitative analysis of the dislocation slip mechanisms as well as their impacts on damage initiation will also be revealed in greater depth. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, |