Fracture and fatigue behaviour of a laser additive manufactured Zr-based bulk metallic glass

Simple item page
dc.contributor.authorBest, JPen_AU
dc.contributor.authorOstergaard, HEen_AU
dc.contributor.authorLi, BSen_AU
dc.contributor.authorStolpe, Men_AU
dc.contributor.authorYang, Fen_AU
dc.contributor.authorNomoto, Ken_AU
dc.contributor.authorHasib, MTen_AU
dc.contributor.authorMuránsky, Oen_AU
dc.contributor.authorBusch, Ren_AU
dc.contributor.authorLi, XPen_AU
dc.contributor.authorKruzic, JJen_AU
dc.date.accessioned2023-04-28T04:09:35Zen_AU
dc.date.available2023-04-28T04:09:35Zen_AU
dc.date.issued2020-12en_AU
dc.date.statistics2022-01-30en_AU
dc.description.abstractLaser additive manufacturing of bulk metallic glass (BMG) provides an effective bypassing of the critical casting thickness constraints that limit the size of components that can be produced; however, open questions remain regarding the resulting mechanical properties. In this work, a Zr-based BMG known as AMZ4 with composition Zr59.3Cu28.8Nb1.5Al10.4 was printed using a laser powder bed fusion (LPBF) technique. Micro X-ray computed tomography results together with electron microscopy imaging revealed porous processing defects in LPBF produced AMZ4 that led to a loss in tensile strength. Fatigue crack growth studies revealed a fatigue threshold, ΔKth., of ∼1.33 MPa√m and a Paris law exponent of m = 1.14, which are relatively low values for metallic materials. A KIC fracture toughness of 24−29 MPa√m was found for the LPBF BMG samples, which is much lower than the KQ of 97−138 MPa√m and KJIC of 158−253 MPa√m measured for the cast alloy with the same composition. The lower fracture toughness of the laser processed AMZ4 was attributed to ∼7.5× higher dissolved oxygen in the structure when compared to the cast AMZ4. Despite the higher level of oxygen, the formation of oxide nanocrystals was not observed by transmission electron microscopy. Oxygen induced toughness loss was confirmed by dissolving elevated concentrations of oxygen into cast AMZ4 rods, which led to a reduction in bending ductility and changes in the short-range order of the glass structure, as revealed by synchrotron X-ray diffraction. © 2020 Elsevier B.V.en_AU
dc.description.sponsorshipThis research acknowledges funding from Universities Australia and the Deutsche Akademischer Austauschdienst (DAAD) through the Australia-Germany Joint Research Co-operation Scheme (UA-DAAD, Nos. 57386795 and 57447466). J.J. Kruzic also acknowledges financial support from Australian Research Council Discovery Grant DP180101393 and the Alexander von Humboldt Foundation Friedrich Wilhelm Bessel Award.en_AU
dc.identifier.articlenumber101416en_AU
dc.identifier.citationBest, J. P., Ostergaard, H. E., Li, B., Stolpe, M., Yang, F., Nomoto, K., Hasib, M. T., Muránsky, O. Busch, R, Li, X. & Kruzic, J. J. (2020). Fracture and fatigue behaviour of a laser additive manufactured Zr-based bulk metallic glass. Additive Manufacturing, 36, 101416. doi:10.1016/j.addma.2020.101416en_AU
dc.identifier.issn2214-8604en_AU
dc.identifier.journaltitleAdditive Manufacturingen_AU
dc.identifier.urihttps://doi.org/10.1016/j.addma.2020.101416en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14932en_AU
dc.identifier.volume36en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFracturesen_AU
dc.subjectFatigueen_AU
dc.subjectLasersen_AU
dc.subjectAdditivesen_AU
dc.subjectFabricationen_AU
dc.subjectZirconiumen_AU
dc.subjectMetallic glassesen_AU
dc.subjectFracture propertiesen_AU
dc.subjectCrack propagationen_AU
dc.titleFracture and fatigue behaviour of a laser additive manufactured Zr-based bulk metallic glassen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles