Detail publikace

Surface relief evolution and fatigue crack initiation in Rene 41 superalloy cycled at room temperature

BABINSKÝ, T. KUBĚNA, I. ŠULÁK, I. KRUML, T. TOBIÁŠ, J. POLÁK, J.

Originální název

Surface relief evolution and fatigue crack initiation in Rene 41 superalloy cycled at room temperature

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Surface relief evolution and fatigue crack initiation of Rene 41 superalloy was studied. The material was tested in two thermodynamical states: solutionised and aged. Cylindrical specimens were cycled at total strain amplitude 0.8% at room temperature. In order to study relevant mechanisms resulting in surface relief formation and eventually fatigue crack initiation, cycling was interrupted at definite number of elapsed cycles. After each interruption, the specimen surface was observed by means of scanning electron microscopy and thin lamellae were cut out of the surface and observed by means of transmission electron microscopy. Cyclic deformation was found to localise since the first cycle, causing the formation of persistent slip bands and persistent slip markings in the form of slip steps, extrusions and later intrusions as well. Continuous cycling led to the formation of new persistent slip markings as well as widening of the already existing ones. The role of persistent slip markings in fatigue crack initiation at room temperature was found to be crucial in this superalloy. The results were thoroughly discussed in relation to theoretical models of surface relief formation.

Klíčová slova

Low cycle fatigue; Surface relief evolution; Cyclic slip localisation; Persistent slip bands; Fatigue crack initiation

Autoři

BABINSKÝ, T.; KUBĚNA, I.; ŠULÁK, I.; KRUML, T.; TOBIÁŠ, J.; POLÁK, J.

Vydáno

5. 6. 2021

Nakladatel

ELSEVIER SCIENCE SA

Místo

LAUSANNE

ISSN

0921-5093

Periodikum

Materials Science and Engineering A

Ročník

819

Číslo

141520

Stát

Švýcarská konfederace

Strany počet

14

URL

https://www.sciencedirect.com/science/article/pii/S0921509321007899?via%3Dihub

BibTex

@article{BUT180803,
  author="Tomáš {Babinský} and Ivo {Kuběna} and Ivo {Šulák} and Tomáš {Kruml} and Jiří {Tobiáš} and Jaroslav {Polák}",
  title="Surface relief evolution and fatigue crack initiation in Rene 41 superalloy cycled at room temperature",
  journal="Materials Science and Engineering A",
  year="2021",
  volume="819",
  number="141520",
  pages="14",
  doi="10.1016/j.msea.2021.141520",
  issn="0921-5093",
  url="https://www.sciencedirect.com/science/article/pii/S0921509321007899?via%3Dihub"
}