Influence of Graphite Morphology on the Damping Properties of Selected Cast Iron Structures.
Visnapuu A; Betts BA; Neumeier LA
37th Electric Furnace Conf Proc AIME Detroit Mich 1979 Dec; :304-306
Increasing attention has been directed toward a need for better structural materials to reduce equipment noise in metallurgical and other industries in compliance with imposed noise restrictions. One of the goals of the Bureau of Mines is to minimize the undesirable environmental conflicts, impacts, and occupational hazards associated with mining and mineral processing operations. Toward this goal, the Bureau of Mines has investigated damping and other properties of experimental cast irons. It was shown that damping capacity and toughness intermediate to high-damping, brittle gray cast iron and low-damping, tough ductile cast iron can be installed in "hybrid" cast iron with a compacted graphite structure intermediate to the flakes of gray cast iron and the nodules of ductile iron. Damping capacity of ductile iron can also be enhanced by hot working reduction. Comparative damping data are given for hybrid cast iron, conventional gray and ductile cast irons, and steels containing various amounts of carbon and subjected to a variety of heat treatments.
37th Electric Furnace Conf. Proc., AIME, Detroit, Michigan, Dec. 4-7, 1979; July 1980, PP. 304-306