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Fatigue behavior of AW7075 aluminum alloy in ultra-high cycle fatigue region

SYSNO ASEP	0523973
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Fatigue behavior of AW7075 aluminum alloy in ultra-high cycle fatigue region
Author(s)	Fintová, Stanislava (UFM-A)_ORCID Kuběna, Ivo (UFM-A)_{RID, ORCID} Trško, L. (SK) Horník, Vít (UFM-A) Kunz, Ludvík (UFM-A)_{RID, ORCID}
Number of authors	5
Article number	138922
Source Title	Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093 Roč. 774, FEB (2020)
Number of pages	8 s.
Language	eng - English
Country	CH - Switzerland
Keywords	precipitate-free zones ; anodic-oxidation ; mechanisms ; performance ; damage ; life ; Fatigue ; Ultra-high cycle fatigue ; Fatigue crack initiation ; Fatigue damage ; aw7075
Subject RIV	JG - Metallurgy
OECD category	Materials engineering
R&D Projects	EF16_013/0001823 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Limited access
Institutional support	UFM-A - RVO:68081723
UT WOS	000514747200013
EID SCOPUS	85077674805
DOI	10.1016/j.msea.2020.138922
Annotation	Advanced electron microscopy methods were used with the aim to explain the differences in the response of strengthened AW 7075 T6511 aluminum alloy to fatigue loading at 5 Hz and 20 kHz. The shift of the S-N curve to higher number of cycles to fracture for the specimens tested at high frequency was experimentally determined. This effect is not connected with a change of the fatigue crack initiation mechanism and site from the surface to material interior. The absence of slip markings and cracking of primary intermetallic particles on the surface of cycled specimens were characteristic features. A difference in the dislocation density and dislocation arrangement in the vicinity of the fatigue crack initiation sites was shown to be the only observable effect. However, consistent with the strengthened structure of the alloy, no specific dislocation structure due to the cyclic loading was observed, regardless of the loading frequency and stress amplitude.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2021
Electronic address	https://doi.org/10.1016/j.msea.2020.138922

Number of the records: 1