Neutron diffraction based non-destructive techniques for integrity studies on copper-stainless steel hybrid composites fabricated by friction stir forming

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dc.contributor.authorAhuja, Yen_AU
dc.contributor.authorAbrahams, Ren_AU
dc.contributor.authorParadowska, AMen_AU
dc.date.accessioned2021-03-10T22:52:52Zen_AU
dc.date.available2021-03-10T22:52:52Zen_AU
dc.date.issued2017-11-27en_AU
dc.date.statistics2021-03-09en_AU
dc.description.abstractA novel technique based on probeless tool aided friction stir forming (FSF) has enabled fabrication of bimetallic composites of copper (Cu) with immiscible metals such as tungsten (W) and stainless steel (SS). Thermomechanical bonding of Cu and the embedded SS-insert, with different interfacial geometries and with different intermediate metal powder layers, was investigated. A full 360 tomography of the Cu-SS composites was performed on the neutron imagining station DINGO, at ANSTO. Sequentially stacked neutron images were reconstructed into a 3D model of the sample to examine the existence of voids and tunnel defects. Complete encapsulation and continuous bonding of the SS-insert with thermo-mechanically conditioned Cu established the feasibility of FSF for fabricating such hybrid Cu-SS composites. Additionally, peak temperatures during the process were noted to reach up to 600C, bonding at such temperatures may lock in strain. Furthermore, on cooling significant thermal stresses might develop at the Cu-SS interface owing to the difference in the mechanical properties of two metals. Exposure to continuous heating and cooling cycle during the double pass technique might also result in residual stresses. These stresses occurring as a result of the thermomechanical bonding may affect the integrity of the composite. Owing to the architecturally intricate character of the fabricated Cu-SS hybrid composite, non-destructive neutron diffraction technique of KOWARI strain scanner at ANSTO was utilised. Through-thickness scans across the Cu-SS interfaces were performed using 2 x 2 x 2 mm3 gauge volume. The stress analysis performed in isolated spots of the Cu-SS composite showed minimal variation in the residual stress distribution in all three – longitudinal, traverse and normal directions.© 2017 Engineers Australiaen_AU
dc.identifier.booktitle9th Australasian Congress on Applied Mechanics (ACAM9), University of NSW, Sydney, 27-29 November 2017en_AU
dc.identifier.citationAhuja, Y., Abrahams, R. & Paradowska, A. (2017). Neutron diffraction based non-destructive techniques for integrity studies on copper-stainless steel hybrid composites fabricated by friction stir forming. Paper presented at the Australasian Congress on Applied Mechanics (ACAM9), University of NSW, Sydney, 27-29 November 2017. In Prusty, G. & Paradowska, A. (eds) 9th Australasian Congress on Applied Mechanics (ACAM9), University of NSW, Sydney, 27-29 November 2017, (pp. 25-31). Retrieved from: https://search.informit.org/doi/10.3316/INFORMIT.389943580527072en_AU
dc.identifier.conferenceenddate29 November 2017en_AU
dc.identifier.conferencename9th Australasian Congress on Applied Mechanics (ACAM9)en_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 November 2017en_AU
dc.identifier.editorsPrusty, G. & Paradowska, Aen_AU
dc.identifier.isbn9781925627022en_AU
dc.identifier.pagination25-31en_AU
dc.identifier.urihttps://search.informit.org/doi/10.3316/INFORMIT.389943580527072en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10514en_AU
dc.language.isoenen_AU
dc.publisherEngineers Australiaen_AU
dc.subjectCopperen_AU
dc.subjectSteelsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectNondestructive testingen_AU
dc.subjectComposite materialsen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectWeldingen_AU
dc.titleNeutron diffraction based non-destructive techniques for integrity studies on copper-stainless steel hybrid composites fabricated by friction stir formingen_AU
dc.typeConference Paperen_AU
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