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Relation between mechanical properties and microstructure in CRE Type 308 weldments
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TLDR
In this article, a shielded metal arc (SMA) Type 308 stainless steel pressure vessel test weld with the controlled residual elements (CRE) boron, titanium, and phosphorus was tensile tested and creep tested at temperatures to 650/sup 0/C (1200/sup 1/F).Abstract:
A shielded metal arc (SMA) Type 308 stainless steel pressure vessel test weld with the controlled residual elements (CRE) boron, titanium, and phosphorus was tensile tested and creep tested at temperatures to 650/sup 0/C (1200/sup 0/F). Improved ductility in tests lasting several thousands of hours, compared to that of standard welds, is associated with the absence of interphase separation. Systematic variations in microstructure and mechanical properties throughout the weld and in the heat-affected zone are due to thermal and mechanical cycling during the welding process. Anisotropic deformation, that is related to local substructure and preferred crystallographic orientation, occurs.read more
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Embrittlement of austenitic stainless steel welds
TL;DR: The aging behavior of type-308 stainless steel weld has been examined over a range of temperatures 475--850 C for times up to 10,000 hrs as discussed by the authors, showing that the unstable ferrite may undergo a variety of solid state transformations.
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Embrittlement of austenitic stainless steel welds
TL;DR: The microstructure of type-308 austenitic stainless steel weld metal containing {gamma} and {delta} and ferrite is shown in this article, where a continuous network of M{sub 23}C{sub 6} carbide forms at the austenite/ferrite interface.
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Microstructural development in DED stainless steels: applying welding models to elucidate the impact of processing and alloy composition
TL;DR: In this article, the development of oxide inclusions, compositional microsegregation, ferrite, matrix austenite grains, and dislocation substructures are used to clarify microstructural evolution during deposition of austenitic stainless steels.
Solidification and aging behavior of Types 308 and 308CRE stainless steel welds
TL;DR: In this paper, it is proposed that the elimination of a continuous network of carbides is responsible for the improved elevated-temperature properties of stainless steel welds and the different type of precipitate formed may also play a role.
References
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Journal ArticleDOI
Phase instabilities during high temperature exposure of 316 austenitic stainless steel
B. Weiss,R. Stickler +1 more
TL;DR: In this paper, time-temperature-precipitation diagrams were determined between 400° and 900°C for up to 3000 hr as a function of carbon content, solution treatment temperature, and cold work.
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A numerical thermo-mechanical model for the welding and subsequent loading of a fabricated structure
Hugh D. Hibbitt,Pedro V. Marcal +1 more
TL;DR: In this article, a numerical model is developed for the welding and subsequent loading of a fabricated structure, which treats the weld process as a thermo-mechanical problem, and the model includes finite strain effects during isothermal loading, so that it may be used in the modeling of distortion sensitive structure.