Combined crystal plasticity simulations and experiments for parameter identification: application to near- β titanium alloy
Journal of Materials Science(2020)
Abstract
In this work, the crystal plasticity finite element (CPFE) simulations and experiments of nanoindentation and tensile tests are conducted to obtain the load–displacement curves of primary α grains and the true stress–true strain curves of equiaxed β aggregate, respectively. The satisfying agreement of the experimental and simulated curves demonstrates that proposed strategy could successfully identify the crystal plasticity constitutive parameters for Ti-7333 alloy, as well as for other near- β titanium alloy. Based on simulated results, the activation of slip systems and the ratio of critical resolved shear stress of basal slip to prismatic slip in primary α grains are discussed. The evolution of geometrically necessary dislocation density during tensile deformation is investigated. These results not only provide accurate parameters for mechanical behavior prediction of Ti-7333 alloy by CPFE simulations, but also contribute to further understandings in deformation mechanism of titanium.
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Key words
combined crystal plasticity simulations,alloy
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