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

SYSNO ASEP	0543078
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Surface relief evolution and fatigue crack initiation in René 41 superalloy cycled at room temperature
Author(s)	Babinský, Tomáš (UFM-A)_ORCID Kuběna, Ivo (UFM-A)_{RID, ORCID} Šulák, Ivo (UFM-A)_ORCID Kruml, Tomáš (UFM-A)_{RID, ORCID} Tobiáš, Jiří (UFM-A) Polák, Jaroslav (UFM-A)_{RID, ORCID}
Number of authors	6
Article number	141520
Source Title	Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093 Roč. 819, JUL (2021)
Number of pages	14 s.
Language	eng - English
Country	CH - Switzerland
Keywords	René 41 superalloy ; Low cycle fatigue ; Surface relief evolution ; Cyclic slip localisation ; Persistent slip bands ; Fatigue crack initiation
Subject RIV	JL - Materials Fatigue, Friction Mechanics
OECD category	Audio engineering, reliability analysis
R&D Projects	EF16_013/0001823 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA18-03615S GA ČR - Czech Science Foundation (CSF)
	LM2015069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Research Infrastructure	IPMINFRA - 90069 - Ústav fyziky materiálů AV ČR, v. v. i.
Method of publishing	Limited access
Institutional support	UFM-A - RVO:68081723
UT WOS	000668973600001
EID SCOPUS	85108144990
DOI	10.1016/j.msea.2021.141520
Annotation	Surface relief evolution and fatigue crack initiation of René 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.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2022
Electronic address	https://www.sciencedirect.com/science/article/pii/S0921509321007899?via%3Dihub

Number of the records: 1