Fatigue and short crack assessment of powder bed fusion laser-based fabricated AlSi10Mg miniature specimens under alternating bending load

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dc.contributor.authorStammkötter, Sebastian
dc.contributor.authorTenkamp, Jochen
dc.contributor.authorTeschke, Mirko
dc.contributor.authorDonnerbauer, Kai
dc.contributor.authorKoch, Alexander
dc.contributor.authorPlatt, Timo
dc.contributor.authorBiermann, Dirk
dc.contributor.authorWalther, Frank
dc.date.accessioned2025-03-05T11:34:34Z
dc.date.available2025-03-05T11:34:34Z
dc.date.issued2024-10-28
dc.description.abstractAl-Si alloys are commonly used in the automotive and aircraft industry because of their excellent strength-to-weight ratio. Due to the laser powder bed fusion manufacturing process, inhomogeneous cooling affects the microstructure as well as defect distributions. Within this paper, the uniform fatigue damage tolerance assessment was further qualified for (miniature) bending specimens with different loaded volumes based on the concepts according to Murakami (√area) and Shiozawa for an initial defect-based model. These approaches were used to calculate defect-related fatigue life curves, in which the cyclic stress intensity factor (ΔK) at the initiating defect (√area) was used to represent local stress concentration at the crack tip instead of nominal stress-based S-N curves. Results of S-N curves did not allow a precise lifetime prediction due to increasing effect of manufacturing-related defect distributions, while fracture mechanical approaches enable a uniform fatigue lifetime description of different testing volumes. The calculated fatigue limit and short crack threshold value suggested by Noguchi based on the extended approach of Murakami need to be compared and validated experimentally. Furthermore, the effects of miniaturization and crack propagation have been identified and considered. Uniform fatigue life predictions and efficient materials testing have been combined and show potential for future research.en
dc.identifier.urihttp://hdl.handle.net/2003/43516
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-25349
dc.language.isoen
dc.relation.ispartofseriesMaterials and design; 247
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAl-Si alloyen
dc.subjectAdditive manufacturingen
dc.subjectFracture mechanical approachen
dc.subjectBendingen
dc.subjectMiniaturizationen
dc.subject.ddc660
dc.subject.rswkAluminiumlegierungde
dc.subject.rswkSiliciumlegierungde
dc.subject.rswkRapid Prototyping <Fertigung>de
dc.subject.rswkSelektives Laserschmelzende
dc.subject.rswkBruchmechanikde
dc.subject.rswkBiegende
dc.subject.rswkMiniaturisierungde
dc.subject.rswkMaterialermüdungde
dc.subject.rswkErmüdungsrissde
dc.titleFatigue and short crack assessment of powder bed fusion laser-based fabricated AlSi10Mg miniature specimens under alternating bending loaden
dc.typeText
dc.type.publicationtypeArticle
dcterms.accessRightsopen access
eldorado.secondarypublicationtrue
eldorado.secondarypublication.primarycitationStammkötter, S. et al. (2024) ‘Fatigue and short crack assessment of powder bed fusion laser-based fabricated AlSi10Mg miniature specimens under alternating bending load’, Materials and design, 247. Available at: https://doi.org/10.1016/j.matdes.2024.113412
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1016/j.matdes.2024.113412

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