Please use this identifier to cite or link to this item: doi:10.22028/D291-32180
Title: Assessing the intergranular crack initiation probability of a grain boundary distribution by an experimental misalignment study of adjacent slip systems
Author(s): Schäfer, Florian
Lang, Eric P. W.
Bick, Michael
Knorr, Alain Franz
Marx, Michael
Motz, Christian
Language: English
Title: Procedia Structural Integrity
Pages: 547-554
Publisher/Platform: Elsevier
Year of Publication: 2017
Title of the Conference: 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017
Place of the conference: Funchal, Madeira, Portugal
Free key words: grain boundary resistance
slips system alignment
3D microstructure
boundary crack initiation
DDC notations: 500 Science
530 Physics
540 Chemistry
600 Technology
620 Engineering and machine engineering
621.3 Electrical engineering, electronics
660 Chemical engineering
Publikation type: Conference Paper
Abstract: Crack initiation at grain boundaries due to blocked slip transfer of dislocations is a main failure mechanism during the fatigue of metals. A quantification of the resistance effect of a grain boundary is needed to assess a textured or texture-free microstructure for fatigue strength. Geometric approaches based on the misalignment of slip systems in adjacent grains are widely used. Hence, we validated the geometric transmission factor of Shen et al. in coarse-grained high-purity aluminum under the assumption that the combination of a large slip activity and a blocked slip at a grain boundary leads to intergranular crack initiation and revealed that a detailed knowledge of the 3D-orientation of the grain boundary is essential. Thereby we gathered information about the 3D-microstructure using FIB-cross-sectioning. Hence it is possible to evaluate potential crack initiation sites for a specific microstructure or to estimate the fatigue strength of a textured microstructure in terms of a crack initiation probability.
DOI of the first publication: 10.1016/j.prostr.2017.07.161
Link to this record: urn:nbn:de:bsz:291--ds-321809
Date of registration: 15-Sep-2020
Notes: Procedia Structural Integrity, 5 (2017), S. 547-554
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Christian Motz
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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