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Ermüdungsrissausbreitung in hochfesten Aluminium- und Titanlegierungen bei periodischen Überlasten
Citation Link: https://doi.org/10.15480/882.492
Other Titles
Effect of periodic overloads on fatigue crack propagation in high-strength Aluminium- and Titanium alloys
Publikationstyp
Doctoral Thesis
Date Issued
2008
Sprache
German
Author(s)
Advisor
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2008-02-08
TORE-DOI
The influence of periodically applied overloads on fatigue crack propagation was examined for each a fine and a coarse grained aluminium alloy AA 2024 T3, alloys AA 6156 T62 and AA 7349 T76511, as well as a fine bi-modal and a coarse lamellar microstructure of titanium alloy Ti-6Al-4V. The overloads result in acceleration or retardation of crack growth rate depending on the interaction of the overload mechanisms. As new mechanism, controlling the predominant retardation behaviour, the increase in microscopic roughness of the fracture surface due to steps parallel to the direction of crack propagation created by the overloads was revealed.
Subjects
Ti6AlV4
aluminium alloy
fatigue crack propagation
DDC Class
600:Technology (Applied sciences)
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Name
DissertationHeidemann.pdf
Size
13.29 MB
Format
Adobe PDF