Publication result detail

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.

Original Title

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

English Title

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

Type

WoS Article

Original Abstract

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.

English abstract

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.

Keywords

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

Key words in English

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

Authors

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

RIV year

2023

Released

05.06.2021

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE

ISBN

0921-5093

Periodical

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Volume

819

Number

141520

State

Swiss Confederation

Pages count

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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING",
  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"
}