Ductile Iron Society annual meeting highlights testing practices, technological advancements. (Metalcasting Associations).The Ductile Iron Ductile iron, also called ductile cast iron or nodular cast iron, is a type of cast iron invented in 1943 by Keith Millis[1]. While most varieties of cast iron are brittle, ductile iron is much more ductile, as the name implies. Society gathered in Oshkosh, Wisconsin Oshkosh is a city located where the Fox River enters Lake Winnebago in Winnebago County, Wisconsin. As of the 2000 census, the city had a total population of 62,916. It has a metropolitan area of 159,972 people. , for its summer meeting June 12-14. Sessions focused on a variety of subjects, including sand and eddy current Eddy current An electric current induced within the body of a conductor when that conductor either moves through a nonuniform magnetic field or is in a region where there is a change in magnetic flux. It is sometimes called Foucault current. testing, spectrometer standards and casting defects. Dan Korpi, Waupaca Foundry, gave a presentation on eddy current testing to detect carbides in ductile iron castings. "An eddy current is a circular alternating electrical current induced into castings," Korpi said. Advantages to the nondestructive non·de·struc·tive adj. Of, relating to, or being a process that does not result in damage to the material under investigation or testing. non test include an instantaneous signal, sensitivity to many variables and adaptability to go/no-go situations. Korpi discussed how eddy current testing has been implemented at Waupaca to detect carbides. "Using eddy current testing, we are able to identify castings that contain 3-5% carbides," Korpi said. According to Korpi, several limitations to the test exist. These include the need to suppress variables that are not of interest, a low depth of penetration and a limit to conductive material. In other presentations, Rod Naro, ASI ASI, n See Anxiety Sensitivity Index. International, Inc., discussed lustrous lus·trous adj. 1. Having a sheen or glow. 2. Gleaming with or as if with brilliant light; radiant. See Synonyms at bright. lus carbon defects in ductile iron, and Mary Beth Krysiak, Disa Industries, Inc., spoke on recent developments in sand testing, concentrating on the improvements in testing chemically-bonded sand. As part of the meeting, a tour of Precision Metalsmiths, Inc., Markesan, Wisconsin, was provided. The company specializes in small castings ranging from fractions of an oz to 10 lb, with its patented investment casting process. |
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