Fatigue crack initiation in a notched single-crystal superalloy component
2010 (English)In: Procedia Engineering, ISSN 1877-7058, Vol. 2, no 1, 1067-1075 p.Article in journal (Refereed) Published
In this paper, the fatigue crack initiation in notched single-crystal test specimens of material MD2 is investigated and analysed. A critical plane approach is adopted, in which the total strain ranges on the discrete slip planes are evaluated. Furthermore, a Coffin-Manson type of expression is used to describe the number of cycles to fatigue crack initiation. This relation is determined from a set of smooth test specimens loaded uniaxially in the ,  and directions at 500 °C with Rε=−1. The numerical procedure is then applied to a series of experiments, in which notched single-crystal test specimens were exposed to uniaxial cyclic loading in the  direction at 500 °C with Rε=0.
Place, publisher, year, edition, pages
Elsevier , 2010. Vol. 2, no 1, 1067-1075 p.
Fatigue initiation; Low cycle fatigue; Critical plane approach; Single-crystal superalloy
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-56588DOI: 10.1016/j.proeng.2010.03.115OAI: oai:DiVA.org:liu-56588DiVA: diva2:320528