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2018 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 925, p. 377-384Article in journal (Refereed) Published
Abstract [en]
Grey iron alloyed with molybdenum and niobium in seven different compositions has been casted using three, in industrial components viable, solidification times which resulted in 21 different samples. The samples have been investigated with respect to microstructure, static properties and thermo-mechanical fatigue performance. It was found that the solidification time is very important for both the static and thermo-mechanical performance. If the solidification time is long the properties are controlled entirely by the large graphite flakes and there is no influence of the alloying elements. On the other hand if the solidification time can be kept short the need for alloying elements may be removed. For the shorter solidification times an influence from the matrix and thus the alloying elements can be seen. It was found that molybdenum enhances TMF-life while no such effect was found for niobium. Niobium, on the other hand, has a larger effect on static strength than molybdenum and also on the cyclic stress in the thermo-mechanical fatigue experiments.
Place, publisher, year, edition, pages
Trans Tech Publications, 2018
Keywords
Grey cast iron, Static mechanical properties, Thermomechanical fatigue, Alloying, Alloying elements, Molybdenum, Niobium, Solidification, Thermal fatigue, Effect of niobium, Industrial components, Solidification time, Static properties, Thermo mechanical fatigues (TMF), Thermo-mechanical performance, Cast iron
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-41296 (URN)10.4028/www.scientific.net/MSF.925.377 (DOI)XYZ ()2-s2.0-85050010392 (Scopus ID)9783035710557 (ISBN)
Conference
11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017, Jönköping, Sweden, 4-7 September 2017
2018-08-292018-08-292019-01-25Bibliographically approved