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Intergranular fatigue crack initiation in polycrystalline copper
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SYSNO ASEP 0558727 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Intergranular fatigue crack initiation in polycrystalline copper Author(s) Chlupová, Alice (UFM-A) RID, ORCID
Šulák, Ivo (UFM-A) ORCID
Babinský, Tomáš (UFM-A) ORCID
Polák, Jaroslav (UFM-A) RID, ORCIDNumber of authors 4 Article number 143357 Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 848, JUL (2022)Number of pages 10 s. Language eng - English Country CH - Switzerland Keywords Extrusions ; Fatigue crack ; Grain boundary damage ; Intergranular initiation ; Intrusions Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects LM2015069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000835134300003 EID SCOPUS 85131453678 DOI 10.1016/j.msea.2022.143357 Annotation Polycrystalline copper specimens were fatigued in strain-controlled regime with high and low strain amplitude. Stress amplitude, plastic strain amplitude and hysteresis loops were recorded. The loop shape parameter reflecting the onset and evolution of the localization of cyclic plastic deformation was evaluated. Mechanism of intergranular fatigue crack initiation was studied on the electrolytically polished specimen surfaces using scanning electron microscopy coupled with focused ion beam. Intergranular cracks had initiated already at 4% of the fatigue life. Corrugated surface of grain boundary cracks close to the surface of the grains was closely related to the occurrence of the extrusions and intrusions produced on the grain boundaries. The observations give further support to the novel mechanism of grain boundary crack initiation based on the emergence of extrusions and intrusions on the grain boundary surface. Factors affecting the initiation of grain boundary cracks were identified. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0921509322007523?via%3Dihub
Number of the records: 1