Low-Cycle-Fatigue Performance of Stress-Aged EN AW-7075 Alloy
| dc.date.accessioned | 2024-02-22T11:18:34Z | |
| dc.date.available | 2024-02-22T11:18:34Z | |
| dc.date.issued | 2023-05-05 | |
| dc.identifier | doi:10.17170/kobra-202402229625 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/15479 | |
| dc.description.sponsorship | Gefördert im Rahmen des Projekts DEAL | |
| dc.language.iso | eng | |
| dc.rights | Namensnennung 4.0 International | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | high-strength aluminum alloys | eng |
| dc.subject | low-cycle fatigue | eng |
| dc.subject | mechanical properties | eng |
| dc.subject | microstructures | eng |
| dc.subject | stress aging | eng |
| dc.subject.ddc | 600 | |
| dc.title | Low-Cycle-Fatigue Performance of Stress-Aged EN AW-7075 Alloy | eng |
| dc.type | Aufsatz | |
| dcterms.abstract | The effect of a novel heat treatment, that is, aging under superimposed external stress, on the fatigue performance and microstructural evolution of a high-strength aluminum alloy (EN AW-7075) is presented. Stress aging, a combination of heat treatment and superimposed external stress, can enhance the mechanical properties of EN AW-7075 under monotonic loading due to the acceleration of precipitation kinetics. Scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) reveal that a longer aging time and the presence of superimposed stress both promote the formation and growth of precipitates, that is, the precipitation of strengthening η´ precipitates. This is confirmed by differential scanning calorimetry (DSC) heating experiments of stressless and stress-aged states. Furthermore, stress aging leads to a reduction of dimensions of precipitate-free zones near grain boundaries. Cyclic deformation responses (CDRs) and half-life hysteresis loops are evaluated focusing on the low-cycle fatigue (LCF) performance of different conditions. A noticeable cyclic hardening seen in case of the specimens aged for a short time indicates the occurrence of dynamic strain aging (DSA). Eventually, stress aging allows for an enhancement of the monotonic mechanical properties of EN AW-7075 without degrading the cyclic performance in the LCF regime. | eng |
| dcterms.accessRights | open access | |
| dcterms.creator | Sajadifar, Seyed Vahid | |
| dcterms.creator | Krooß, Philipp | |
| dcterms.creator | Krochmal, Marcel | |
| dcterms.creator | Wegener, Thomas | |
| dcterms.creator | Heidarzadeh, Akbar | |
| dcterms.creator | Fröck, Hannes | |
| dcterms.creator | Zavašnik, Janez | |
| dcterms.creator | Kessler, Olaf | |
| dcterms.creator | Niendorf, Thomas | |
| dcterms.extent | 13 Seiten | |
| dc.relation.doi | doi:10.1002/adem.202300090 | |
| dc.subject.swd | Aluminiumlegierung | ger |
| dc.subject.swd | Materialermüdung | ger |
| dc.subject.swd | Mechanische Eigenschaft | ger |
| dc.subject.swd | Gefüge <Werkstoffkunde> | ger |
| dc.type.version | publishedVersion | |
| dcterms.source.identifier | eissn:1527-2648 | |
| dcterms.source.issue | Issue 15 | |
| dcterms.source.journal | Advanced Engineering Materials | eng |
| dcterms.source.volume | Volume 25 | |
| kup.iskup | false | |
| dcterms.source.articlenumber | 2300090 |
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