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Very High Cycle Fatigue of Two Ductile Iron Grades
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik.ORCID-id: 0000-0001-6029-2613
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik.
Atlas Copco Rock Drills AB, Klerkgatan 21, SE-70225 Orebro, Sweden..
Atlas Copco Rock Drills AB, Klerkgatan 21, SE-70225 Orebro, Sweden..
Vise andre og tillknytning
2016 (engelsk)Inngår i: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 87, nr 5, s. 614-621Artikkel i tidsskrift (Fagfellevurdert) Published
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Text
Abstract [en]

Two ductile iron grades, EN-GJS-600-3 a ferritic-pearlitic grade, and EN-GJS-600-10 a silicon strengthened ferritic nodular iron grade, are studied in the very high cycle fatigue range using a 20kHz ultrasonic test equipment. Fatigue strengths and SN-curves are achieved, and fracture surfaces and microstructures are investigated. The ferritic grade with higher ductility displays a lower fatigue strength at 10(8) load cycles than the ferritic-pearlitic grade, 142 and 167MPa, respectively. Examination of fracture surfaces shows that fatigue failures are controlled by micropores in both of the ductile iron grades, while the graphite nodule distributions do not seem to influence the difference in fatigue strengths. Prediction of the fatigue strengths, using a model for ductile iron proposed by Endo and Yanase, indicates a large potential for improvement in particular for the ferritic grade.

sted, utgiver, år, opplag, sider
2016. Vol. 87, nr 5, s. 614-621
Emneord [en]
ductile iron, fatigue, very high cycle fatigue, microstructure
HSV kategori
Forskningsprogram
Materialvetenskap
Identifikatorer
URN: urn:nbn:se:kau:diva-42622DOI: 10.1002/srin.201500163ISI: 000375688300009OAI: oai:DiVA.org:kau-42622DiVA, id: diva2:933240
Tilgjengelig fra: 2016-06-03 Laget: 2016-06-03 Sist oppdatert: 2019-07-10bibliografisk kontrollert

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