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Occurrence and Behavior of Mo-Containing Precipitations in Nodular Cast Iron at High Temperatures

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dc.contributor.author Dekker, L.
dc.contributor.author Tonn, B.
dc.date.accessioned 2015-04-06T19:22:21Z
dc.date.available 2015-04-06T19:22:21Z
dc.date.issued 2014-11-13
dc.identifier.citation 10 Th International Symposium on the Science and Processing of Cast Iron. 2014. Argentina: Mar del Plata 10 to 13th of November. es_AR
dc.identifier.isbn 978-987-45833-0-7
dc.identifier.uri http://rinfi.fi.mdp.edu.ar/handle/123456789/41
dc.description.abstract In nodular cast iron molybdenum is alloyed in the range of 0.5 wt.-% to 1.5 wt.-% to increase the mechanical properties for high temperature application, especially for thick-walled castings like housings of gas or steam turbines. The behaviour of Mo-precipitations in the as cast state as well as under long exposure to heat was the object of this investigation. In the as-cast state Mo forms metastable carbidic grain-boundary precipitations with iron, silicon and carbon. These transform into stable MoC precipitations during sustained temperature influence. Furthermore, there are finely dispersed Mo-containing precipitations found in the matrix. These increase the high temperature strength of Mo-alloyed cast iron due to the Orowan mechanism and the occurrence of additional grain boundaries. However, it has been shown that these Mo-containing precipitations underlie Ostwald ripening under continuous heat exposure and a precipitation free area occurs along the ferritic grain boundary. es_AR
dc.description.sponsorship Cámara de Industriales Fundidores de la República Argentina. Universidad Nacional de Mar del Plata. Consejo de Investigaciones Científicas y Técnicas. es_AR
dc.language.iso en es_AR
dc.publisher INTEMA - UNMdP-CONICET es_AR
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject Ductile Iron es_AR
dc.subject High-Temperature Application es_AR
dc.subject Molybdenum es_AR
dc.subject Ostwald-Ripening es_AR
dc.title Occurrence and Behavior of Mo-Containing Precipitations in Nodular Cast Iron at High Temperatures es_AR
dc.type Other es_AR
dcterms.type Proceedings Paper


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