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Modification of sintered titanium alloys by hot isostatic pressing

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Show simple item record Bolzoni, Leandro Ruiz-Navas, Elisa María Zhang, Deliang Gordo, Elena 2012-11-19T22:28:31Z 2012-11-19T22:28:31Z 2012-08 2012
dc.identifier.citation Bolzoni, L., Ruiz-Navas, E.M., Zhang, D. & Gordo, E. (2012). Modification of sintered titanium alloys by hot isostatic pressing. In 1st International Conference on Powder Processing, Consolidation and Metallurgy of Titanium, Brisbane, December 4-7 2011, (pp. 63-69). Brisbane, QLD. en_NZ
dc.identifier.issn 1013-9826
dc.description.abstract Powder metallurgy (PM) permits to obtain titanium alloys with properties and microstructures close to ingot metallurgy products. However, residual porosity is normally present in the products produced by the PM route of powder pressing and sintering (P&S)\, and this needs to be reduced by using post-sintering process step such as hot isostatic pressing (HIP) and forging. In this study, the microstructural and mechanical property changes caused by HIP of samples of two alloys, near-α Ti-3Al-2.5V alloy and α+β Ti-6Al-4V, produced by P&S route were investigated. Two types of powders were utilised: prealloyed powders and blend of elemental titanium powder and master alloy powder. Four conditions defined by HIP temperature, pressure and time were used to HIP the sintered samples with two geometries. The results show that, independent of the HIP conditions used, HIP increased the relative density of the samples to approximately 97.5% and their hardness by 30-50 HV depending on the HIP condition. However, HIP at 1000°C changes the fracture mode of the sintered samples from ductile to brittle. en_NZ
dc.language.iso en
dc.publisher Trans Tech Publications en_NZ
dc.relation.ispartof Key Engineering Materials
dc.subject HIP en_NZ
dc.subject Master alloys en_NZ
dc.subject Powder metallurgy en_NZ
dc.subject Prealloyed en_NZ
dc.subject Ti alloys en_NZ
dc.title Modification of sintered titanium alloys by hot isostatic pressing en_NZ
dc.type Conference Contribution en_NZ
dc.identifier.doi 10.4028/ en_NZ

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