Show simple item record  

dc.contributor.advisorGabbitas, Brian
dc.contributor.authorVelluvakkandi, Navaneeth
dc.date.accessioned2016-05-12T04:11:56Z
dc.date.available2016-05-12T04:11:56Z
dc.date.issued2014
dc.identifier.citationVelluvakkandi, N. (2014). Simulation of the powder forging process for titanium components using a porous metal plasticity model (Thesis, Doctor of Philosophy (PhD)). University of Waikato, Hamilton, New Zealand. Retrieved from https://hdl.handle.net/10289/10213en
dc.identifier.urihttps://hdl.handle.net/10289/10213
dc.description.abstractPowder forging is a technique that has been used to produce fully dense near-net parts from metal powders. Due to a “low cost titanium” product manufacturing initiative, targeting a reduction in the cost of titanium components, a titanium powder forging technique has gained significant interest. In titanium powder forging, powder consolidation is a key factor that influences successful component manufacture. Consolidation during titanium powder forging is dependent on the densification and deformation mechanisms involved. In this study, a finite element method is used to model the densification and deformation behaviour of titanium powder compacts during powder forging. The research focuses on developing a simulation capability and identifying a suitable constitutive model to simulate the powder forging process that can predict the relative density distribution. The simulation is carried out in Abaqus software and the results are compared with experimental results. A gamma particle radiography technique is used to compare the experimental density results with the simulated results. The Gurson and Gurson-Tvergaard models are used to predict the relative density of porous titanium powder compacts during upset-powder forging and are used to include the effect of hydrostatic stresses and the extent of densification. Three different modes of densification, related to powder forging were studied i.e. upset forging, hot-repressing and closed die forging. The simulation results indicate that both models can be used to determine the relative density during powder forging. By comparing the simulated results with the experimental results, it is found that the density prediction given by the Gurson-Tvergaard model showed closer agreement with the calculated parameters.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Waikato
dc.rightsAll items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectpowder forging
dc.subjectforging simulation
dc.titleSimulation of the powder forging process for titanium components using a porous metal plasticity model
dc.typeThesis
thesis.degree.grantorUniversity of Waikato
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (PhD)
dc.date.updated2016-03-28T20:11:07Z
pubs.place-of-publicationHamilton, New Zealanden_NZ


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record