Carburization and tensile behavior of Alloy 617 in impure helium containing a part-per-million level of CH4 at 950 °C
Source abstract
Abstract
The carburization and tensile behavior of Alloy 617 corroded at 950 °C for 100 h in the impure helium containing methane were investigated. In helium containing 20 ppm CH 4, Alloy 617 exhibited slight carburization and held its plasticity. However, in helium containing 200 ppm CH 4, Alloy 617 was carburized to a depth of over 20 % and lost plasticity. In addition, the stress-strain curves in the plastic phase at room temperature exhibited a serrated flow phenomenon in both two environments, primarily caused by dynamic interactions between carbide-induced crack pinning and stress-concentration-induced crack unpinning.
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Research context
OpenAlex topics: Fusion materials and technologies · Nuclear Materials and Properties · Advanced ceramic materials synthesis
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