United States Capitol dome: Characterization of cast and wrought materials

Autor:	Christopher N. McCowan, Thomas A. Siewert, David L. Olson, Joseph D. McColskey, K. Hildebrand
Rok vydání:	2011
Předmět:	Materials science Mechanical Engineering Metallurgy Alloy Molding (process) Wrought iron engineering.material Condensed Matter Physics Casting Corrosion Dome (geology) Mechanics of Materials visual_art engineering visual_art.visual_art_medium Gray iron General Materials Science Cast iron
Zdroj:	Materials Characterization. 62:807-816
ISSN:	1044-5803
Popis:	Restoration of the cast iron dome at the United States Capitol is needed because moisture is leaking into interior areas of the building due to corrosion damage. Microstructure, composition, and tensile properties of cast and wrought samples from the dome are discussed in this report. The cast iron skin of the dome is a ferrite–pearlite gray iron with strength consistent with the carbon and silicon content. By current compositional and strength requirements the gray iron alloy comes close to meeting requirements for a class 20 gray iron. The microstructure shows good morphology and distribution of Types A and B graphite flakes that are appropriate for the intended service of the castings. In 20–20 hindsight, the decisions made concerning the composition of the iron, and the details of the molding and casting conditions were all quite good. Fatigue data indicate that good performance should be expected to continue for the dome for many years to come.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::619bc78c54e6be304a6fcc2d09b13e7d https://doi.org/10.1016/j.matchar.2011.05.002 Zobrazit plný text záznamu Full Text from ScienceDirect