Investigating bulk mechanical properties on a micro-scale: micro-tensile testing of ultrafine grained Ni–SiC composite to determine its fracture mechanism and strain rate sensitivity

Simple item page
dc.contributor.authorBhattacharyya, Den_AU
dc.contributor.authorXu, Aen_AU
dc.contributor.authorYang, Cen_AU
dc.contributor.authorThorogood, GJen_AU
dc.date.accessioned2023-09-14T00:37:18Zen_AU
dc.date.available2023-09-14T00:37:18Zen_AU
dc.date.issued2020-02-25en_AU
dc.date.statistics2023-09-04en_AU
dc.description.abstractIn this study, in-situ micro-tensile testing technique was used to investigate the mechanical properties of ultrafine grained Ni-3wt% SiC composite the size effect on the mechanical properties of the ultrafine grained Ni-3wt% SiC composite, and to further reveal the reasons for the low ductility of the bulk Ni-3wt%SiC composite. Dog-bone micro-tensile samples were manufactured using a Focused Ion Beam (FIB) milling machine to 15 μm length with a cross sectional area of 5 μm by 5 μm. The micro-tensile samples are pulled in tension at a quasi-static strain rate of 0.000087/s (LSR) and a relatively faster strain rate of 0.011/s (HSR). Analysis of experimental stress-strain plots for the LSR tests measured yield stress, ultimate tensile stress and modulus values that approach values previously reported for bulk/macro-level tensile tests. However, the elongation and fracture energy at the micro-level is approximately half that at the bulk scale. This discrepancy is attributed to the presence of unwanted carbon and silicon oxide impurities ∼1.5 μm in diameter which act as stress concentrators especially given their large size relative to the width of the tensile specimens. The composition of these impurities was validated by transmission electron microscopy, and they seem to be the most likely cause of low ductility of the Ni-3wt% SiC composite. In all, the study undertaken here was able to replicate mechanical properties observed at the macro scale as well as reproduce a strain rate effect. Furthermore, the failure mode of Ni-3wt% SiC composite was identified and analysed in detail.en_AU
dc.identifier.citationBhattacharyya, D., Xu, A., Yang. C., & Thorogood, G. (2020). Investigating bulk mechanical properties on a micro-scale: micro-tensile testing of ultrafine grained Ni–SiC composite to determine its fracture mechanism and strain rate sensitivity. Presentation to TMS 2020 and 149th TMS Annual Meeting and Exhibition, San Diego, California, 23- 27 February 2020, (pp. 218). Retrieved from https://www.tms.org/tms2020/downloads/TMS2020-Technical-Program-WEB.pdfen_AU
dc.identifier.conferenceenddate2020-02-27en_AU
dc.identifier.conferencenameTMS 2020 and 149th TMS Annual Meeting and Exhibitionen_AU
dc.identifier.conferenceplaceSan Diego, Californiaen_AU
dc.identifier.conferencestartdate2020-02-23en_AU
dc.identifier.pagination218en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15115en_AU
dc.language.isoenen_AU
dc.publisherThe Minerals, Metals & Materials Societyen_AU
dc.relation.urihttps://www.tms.org/tms2020/downloads/TMS2020-Technical-Program-WEB.pdfen_AU
dc.subjectMaterials testingen_AU
dc.subjectTensile propertiesen_AU
dc.subjectSilicon carbidesen_AU
dc.subjectNickelen_AU
dc.subjectStrain rateen_AU
dc.subjectParticlesen_AU
dc.titleInvestigating bulk mechanical properties on a micro-scale: micro-tensile testing of ultrafine grained Ni–SiC composite to determine its fracture mechanism and strain rate sensitivityen_AU
dc.typeConference Presentationen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
TMS2020-Technical-Program-WEB-1.pdf
Size:
12.01 MB
Format:
Adobe Portable Document Format
Description:
Download
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
Conference Publications