Effect of heat treatment on grain boundary carbides and primary water stress corrosion cracking resistance of Alloy 182 weld
Source abstract
Abstract
Abstract Alloy 182 welds were heat-treated at 600, 620, and 650 °C for 10 h. The primary water stress corrosion cracking initiation test showed significant improvement in the cracking resistance of the heat-treated specimens over the as-welded specimens. Microstructure analysis demonstrated that Cr23C6 grain boundary carbides dominated in the as-welded specimen, while Cr7C3 carbides were dominant after heat treatment. The depth of grain boundary oxidation ahead of the crack tip was large for the as-welded specimen, but less for the heat-treated specimens. Therefore, the presence of Cr7C3 carbides, in part, contributed to the improved cracking resistance of the Alloy 182 weld.
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Research context
OpenAlex topics: Advanced materials and composites · High-Temperature Coating Behaviors · Metal Alloys Wear and Properties
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