Abstract The evolution of micro-strain and crystallographic texture each phase α+β Ti-6Al-4V titanium alloy generated during tensile deformation has been estimated numerically then compared with the experimental results. It carried out based on Crystal Plasticity Finite Element Model (CPFEM) simulation stress-strain curve till uniform elongation for equiaxed microstructure is synthetically. syn...

Decohesion parameters are computed for the tilt grain boundaries through molecular simulations and the parameters are employed in a elastoplastic deformation model of a face centered cubic (FCC) nanocrystal. The calibrated continuum grain boundary model accounts for reversible elastic and irreversible inelastic separation sliding deformations. The intragranular plasticity was modeled using a ra...

The origins of gradient terms in plasticity are discussed for three different cases related to atomic distance, dislocations, and finite grain size. 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

Self-organized criticality (SOC) is widely observed in systems ranging from creep deformation of single crystal ice to the movement of glacier. -The behavior of these SOC systems follows a power law distribution, which is timeand space-scale invariant. Previous phase field simulation of single crystal nickel has shown that plastic flow is characterized by intermittent dislocation avalanches, wh...

In this paper, results of an investigation on the strain hardening responses of superalloy MP35N with two average grain sizes of 38 and 1 μm, during room temperature tensile testing are reported. The microstructural evolution of the deformed samples was studied using optical and transmission electron microscopy (TEM) techniques. The strain hardening behavior of the 38 μm material was rather sim...

Here, we present a hierarchical form of multiscale modeling to understand fundamental issues ofdeformation in Ti. This report presents our effort in the following areas,1. Effects of oxygen on prismatic faults in -Ti: A combined quantum mechanics/molecular mechanicsstudy2. Nano-indentation and slip transfer (critical in understanding crack initiation)3. An extended-finite e...

A Crystal Plasticity Finite Element (CPFE) framework is proposed for modeling the non-Schmid yield behavior of L12 type Ni3Al crystals and Ni-based superalloys. This relies on estimation model parameters directly from orientation- temperature-dependent experimental stress data. The inelastic deformation extended to precipitate phase superalloys in a homogenized dislocation density based crystal...