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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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Asim, Umair Bin
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Publications (6/6 displayed)
- 2022A Multiscale Constitutive Model for Metal Forming of Dual Phase Titanium Alloys by Incorporating Inherent Deformation and Failure Mechanismscitations
- 2022Effect of Hydrogen and Defects on Deformation and Failure of Austenitic Stainless Steel
- 2020Hydrogen effect on plastic deformation and fracture in austenitic stainless steel
- 2020Crystal Plasticity based Study to Understand the Interaction of Hydrogen, Defects and Loading in Austenitic Stainless Steel Single Crystalscitations
- 2019A CPFEM based study to understand the void growth in high strength dual-phase Titanium alloy (Ti-10V-2Fe-3Al)citations
- 2016A Crystal Plasticity Finite Element Method (CPFEM) based study to investigate the effect of microvoids in single crystalline aluminium alloy
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article
A Multiscale Constitutive Model for Metal Forming of Dual Phase Titanium Alloys by Incorporating Inherent Deformation and Failure Mechanisms
Abstract
Ductile metals undergo a considerable amount of plastic deformation before failure. Void nucleation, growth and coalescence is the mechanism of failure in such metals.–titanium alloys are ductile in nature and are widely used for their unique set of properties such as specific strength, fracture toughness, corrosion resistance and resistance to fatigue failures. Voids in these alloys have been reported to nucleate on the phase boundaries betweenandphase. Based on the findings of crystal plasticity finite element method (CPFEM) investigations of the void growth at the interface ofandphases, a void nucleation, growth, and coalescence model has been formulated. An existing singlephase crystal plasticity theory is extended to incorporate underlying physical mechanisms of deformation and failure in dual phase titanium alloys. Effects of various factors (stress triaxiality, Lode parameter, deformation state (equivalent stress), and phase boundary inclination) on void nucleation, growth and coalescence are used to formulate a phenomenological constitutive model while their interaction with a conventional crystal plasticity theory is established. An extensive parametric assessment of the model is carried out to quantify and understand the effects of the material parameters on the overall material response. Performance of the proposed model is then assessed and verified by comparing the results of the proposed model with the RVE study results. Application of the constitutive model for utilisation in the design and optimisation of the forming process of– titanium alloy components is also demonstrated using experimental data.