Effect of microstructural morphology on the mechanical properties of titanium alloys

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Abstract

Different morphologies of α+β microstructures were obtained in a commercial Ti-6Al-4V alloy by cooling at different rates from the single β-phase region into the two phase region. The effect of such morphologies on mechanical properties was studied using hot compression tests in a Gleeble thermomechanical simulator. A variety of complex morphologies could be obtained since the cooling rate has a significant influence on the β to α phase transformation and the resulting morphological development. While most of the β phase transformed to colonies of α at high cooling rates, it was possible to obtain a complex mixture of a colonies, grain boundary a and lamellar structure by decreasing the cooling rate. These complex morphologies each exhibited distinctive mechanical properties and characteristic dynamic phase transformation behaviour during deformation as a function of strain rate. © 2010 IOP Publishing Ltd.

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Dehghan-Manshadi, A., Reid, M. H., & Dippenaar, R. J. (2010). Effect of microstructural morphology on the mechanical properties of titanium alloys. In Journal of Physics: Conference Series (Vol. 240). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/240/1/012022

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