The effect of superimposed high-cycle fatigue on thermo-mechanical fatigue in cast iron
2015 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 88, 121-131 p.Article in journal (Refereed) Published
The eect of superimposing a high-cycle fatigue strain load on an out-ofphase thermo-mechanical fatigue test of a lamellar, compacted and spheroidal graphite iron, has been investigated. In particular, dierent total mechanical strain ranges, maximum temperatures and high-cycle fatigue strain ranges have been studied. From this, a new property has been identied, measured and compared, namely the thermo-mechanical and high-cycle fatigue threshold, dened as the high-cycle fatigue strain range at which the life is reduced to half. Using a model developed earlier, the lifetimes and the threshold have been successfully estimated for the lamellar and compacted graphite iron, however underestimated for the spheroidal graphite iron. Nevertheless, an expression of the threshold was deduced from the model, which possibly can estimate its value in other cast irons and its high-cycle fatigue frequency dependence.
Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 88, 121-131 p.
Cast iron, Thermo-mechanical fatigue, High-cycle fatigue, Fatigue crack growth, Life prediction
Mechanical Engineering Other Engineering and Technologies
IdentifiersURN: urn:nbn:se:liu:diva-121030DOI: 10.1016/j.ijfatigue.2016.03.020ISI: 000375817000013OAI: oai:DiVA.org:liu-121030DiVA: diva2:850969
Funding agencies: Scania CV AB; Swedish Governmental Agency for Innovation Systems [FFI - 2012 - 03625]; Swedish Foundation for Strategic Research [SM12 - 0014]; Linkoping University [2009 - 00971]
Vid tiden för disputation förelåg publikationen endast som manuskript2015-09-032015-09-032016-06-09Bibliographically approved