Mechanical behaviour of Titanium, Ti-6Al-4V (wt %) alloy and Ti-47Al-2Cr (at %) alloy produced using powder compact forging

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dc.contributor.authorNadakuduru, Vijay Navaratna
dc.contributor.authorZhang, Deliang
dc.contributor.authorRaynova, Stiliana (Stella) Rousseva
dc.contributor.authorCao, Peng
dc.contributor.authorGabbitas, Brian
dc.coverage.spatialConference held at Auckland, New Zealanden_NZ
dc.date.accessioned2011-08-25T02:18:03Z
dc.date.available2011-08-25T02:18:03Z
dc.date.issued2011
dc.description.abstractPowder compact forging was used to produce bulk consolidated titanium and Ti-6Al-4V (wt %) and Ti-47Al-2Cr (at%) alloy disks from hydrogenated and dehydrogenated (HDH) and gas atomised powders (GA) powders (in the case of titanium and Ti-6Al-4V) and a mechanically milled powder (in the case of Ti-47Al-2Cr alloy). The bulk titanium and Ti-6Al-4V (wt %) alloy have been produced by forging of the powder compacts. The Ti-47Al-2Cr (at %) alloy was produced using canned powder compact forging of a Ti/Al/Cr composite powder. The purpose of the present study is to investigate the deformation and fracture behaviour of the bulk consolidated as-forged materials, by conducting tensile testing at room temperature (RT) and examination of the fractured specimens which had near-α, α + β and γ phase structures, respectively. It was found that as-forged bulk titanium disk produced using HDH powder showed a yield point with a yield strength of ~700 MPa and with a considerable amount of ductility. While the as-forged Ti-6Al-4V (wt %) alloy produced using HDH powder, fractured prematurely without any yielding. On the other hand yielding was observed in the as-forged Ti-6Al-4V (wt %) alloy produced using GA powder, showing a yield strength of ~970 MPa and a considerable amount of plastic strain to fracture. The bulk consolidated Ti-47Al-2Cr (at %) alloy also fractured prematurely with fracture strength of ~125 MPa. The mechanical behaviour of the as-forged bulk materials was found to be dependent on several factors such as initial powders used, green density of the powder compact, forging parameters used during forging. It was expected that the entrapped gas in green compacts, absorbed oxygen, porosity and inter-particle bonding play an important role on the quality of the as-forged material, which in turn affected the mechanical behaviour of the bulk material.en_NZ
dc.identifier.citationNadakuduru, V.N., Zhang, D., Raynova, S., Cao, P. Gabbitas, B. (2011). Mechanical behaviour of Titanium, Ti-6Al-4V (wt %) alloy and Ti-47Al-2Cr (at %) alloy produced using powder compact forging. Advanced Materials Research, 275, 186-191.en_NZ
dc.identifier.doi10.4028/www.scientific.net/AMR.275.186en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/5624
dc.language.isoen
dc.publisherTrans Tech Publicationsen_NZ
dc.relation.urihttp://www.scientific.net/AMR.275.186en_NZ
dc.sourceInternational Conference on Structural Integrity and Failureen_NZ
dc.subjectmechanical behaviouren_NZ
dc.subjectpowder compact forgingen_NZ
dc.subjectpowder consolidationen_NZ
dc.subjectTitanium alloyen_NZ
dc.titleMechanical behaviour of Titanium, Ti-6Al-4V (wt %) alloy and Ti-47Al-2Cr (at %) alloy produced using powder compact forgingen_NZ
dc.typeJournal Articleen_NZ
pubs.elements-id20408
pubs.finish-date2010-07-07en_NZ
pubs.start-date2010-07-04en_NZ
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