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Diaconu, Lucian Vasile
Publications (3 of 3) Show all publications
Diaconu, L. V., Sjögren, T., Skoglund, P. & Diószegi, A. (2013). A molibdén hatása az öntöttvasak termomechanikus hőfárasztási tulajdonságaira.. Banyaszati es Kohaszati Lapok - Kohaszat, 146(1), 13-17
Open this publication in new window or tab >>A molibdén hatása az öntöttvasak termomechanikus hőfárasztási tulajdonságaira.
2013 (Hungarian)In: Banyaszati es Kohaszati Lapok - Kohaszat, ISSN 0005-5670, Vol. 146, no 1, p. 13-17Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Budapest: , 2013
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:hj:diva-23143 (URN)
Available from: 2014-01-17 Created: 2014-01-17 Last updated: 2015-10-27Bibliographically approved
Diaconu, L. V., Sjögren, T., Skoglund, P. & Diószegi, A. (2013). Stress relaxation of compacted graphite iron alloyed with molybdenum. International Journal of Cast Metals Research, 26(1), 51-57
Open this publication in new window or tab >>Stress relaxation of compacted graphite iron alloyed with molybdenum
2013 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 26, no 1, p. 51-57Article in journal (Refereed) Published
Abstract [en]

In a previous study, the thermomechanical fatigue resistance of four compacted graphite irons (CGIs) and one grey cast iron was investigated. The molybdenum content of the four CGIs varied between 0 and 1.01 wt-%. It was observed that during thermal cycling, the maximum value of the compressive stress continuously decreased while the value of the maximum tensile stress continuously increased. The continuous decrease in compressive stresses showed that stress relaxation occurs at elevated temperatures during thermal cycling. The goal of the present investigation was to investigate the phenomenon of stress relaxation at elevated temperatures. The tests were performed at 350 and 600°C respectively. The results of the stress relaxation tests performed at 600°C showed the same trend observed at thermomechanical fatigue testing. The tests showed that additions of molybdenum improved the fatigue resistance of CGI by lowering the stress relaxation rate.

Place, publisher, year, edition, pages
Taylor & Francis, 2013
Keywords
Molybdenum alloying, Stress relaxation, Thermomechanical fatigue, Compacted graphite iron
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hj:diva-19446 (URN)10.1179/1743133612Y.0000000036 (DOI)000313743800007 ()JTHMaterialIS (Local ID)JTHMaterialIS (Archive number)JTHMaterialIS (OAI)
Available from: 2012-09-17 Created: 2012-09-17 Last updated: 2018-06-08Bibliographically approved
Diaconu, L. V., Sjögren, T., Skoglund, P. & Diószegi, A. (2012). Influence of molybdenum alloying on thermomechanical fatigue life of compacted graphite irons. International Journal of Cast Metals Research, 25(5), 277-286
Open this publication in new window or tab >>Influence of molybdenum alloying on thermomechanical fatigue life of compacted graphite irons
2012 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 25, no 5, p. 277-286Article in journal (Refereed) Published
Abstract [en]

In this study four compacted graphite irons (CGIs) and one grey cast iron (FGI) were produced and tested in the laboratory. The molybdenum content of the four CGI grades was varied between 0 and 1··01 wt-%. The purpose of the investigations was to examine the effect of the different molybdenum contents of the CGI on the thermomechanical fatigue (TMF) behaviour. The TMF tests were performed by cycling a constrained specimen between 110 and 600°C. For every material three tests were performed on specimens machined from a ∅20 mm cylinder. Other tests were performed on specimens machined from ∅55 mm and ∅85 mm cylinders respectively. The tests showed that additions of molybdenum improved the fatigue resistance of CGI. It was observed that additions of molybdenum refined the pearlite and that the specimens with a finer metallic matrix had a higher TMF resistance.

Place, publisher, year, edition, pages
Maney Publishing, 2012
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hj:diva-19445 (URN)10.1179/1743133612Y.0000000021 (DOI)000309578500004 ()JTHMaterialIS (Local ID)JTHMaterialIS (Archive number)JTHMaterialIS (OAI)
Available from: 2012-09-17 Created: 2012-09-17 Last updated: 2018-06-01Bibliographically approved
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