Polycrystalline shape-memory materials: effect of crystallographic texture

Thamburaja, T Prakash G.; Anand, Lallit

doi:10.1016/s0022-5096(00)00061-2

Cited by 223 publications

(152 citation statements)

References 25 publications

Supporting

Mentioning

149

Contrasting

Unclassified

Order By: Relevance

“…For instance, frameworks (Thamburaja and Anand, 2001;Turteltaub and Suiker, 2005;Lan et al, 2005;Manchiraju and Anderson, 2010) have been developed to incorporate martensitic transformations as the flow rules. Mechanical twinning, which is of great importance to the plasticity of many BCC metals as well as FCC metals with low SFE, has also been incorporated into FE-CP models (Kalidindi, 1998;Staroselsky and Anand, 1998;Salem et al, 2005;Steinmetz et al, 2013;Zhang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

An integrated full-field model of concurrent plastic deformation and microstructure evolution: Application to 3D simulation of dynamic recrystallization in polycrystalline copper

Zhao

Low

Wang

et al. 2016

International Journal of Plasticity

103

View full text Add to dashboard Cite

Many time-dependent deformation processes at elevated temperatures produce significant concurrent microstructure changes that can alter the mechanical properties in a profound manner. Such microstructure evolution is usually absent in mesoscale deformation models and simulations. Here we present an integrated full-field modeling scheme that couples the mechanical response with the underlying microstructure evolution. As a first demonstration, we integrate a fast Fourier transform-based elasto-viscoplastic (FFT-EVP) model with a phase-field (PF) recrystallization model, and carry out three-dimensional simulations of dynamic recrystallization (DRX) in polycrystalline copper. A physics-based coupling between FFT-EVP and PF is achieved by (1) adopting a dislocation-based constitutive model in FFT-EVP, which allows the predicted dislocation density distribution to be converted to a stored energy distribution and passed to PF, and (2) implementing a stochastic nucleation model for DRX. Calibrated with the experimental DRX stress-strain curves, the integrated model is able to deliver full-field mechanical and microstructural information, from which quantitative description and analysis of DRX can be achieved. It is suggested that the initiation of DRX occurs significantly earlier than previous predictions, due to heterogeneous deformation. DRX grains are revealed to form at both grain boundaries and junctions (e.g., quadruple junctions) and tend to grow in a wedge-like fashion to maintain a triple line (not necessarily in equilibrium) with old grains. The resulting stress redistribution due to strain compatibility is found to have a profound influence on the subsequent dislocation evolution and softening.

show abstract

Section: Introductionmentioning

confidence: 99%

An integrated full-field model of concurrent plastic deformation and microstructure evolution: Application to 3D simulation of dynamic recrystallization in polycrystalline copper

Zhao

Low

Wang

et al. 2016

International Journal of Plasticity

103

View full text Add to dashboard Cite

show abstract

“…Moreover, the complexity in the SMA behavior makes that experimental results retrofit continuously the existent models incorporating new particularities observed for each SMA alloy. NiTi crystallographic texture effect coming from heavy cold working was analyzed by Thamburaja et al 6 . On the other hand Sittner and Novak 7 have investigated the crystallographic orientation effects in the origin of lüders like behavior in NiTi tensile tests, while selfheating effects due the latent heat was studied by Anand et al 8 .…”

Section: Introductionmentioning

confidence: 99%

Thermal effects in a mechanical model for pseudoelastic behavior of NiTi wires

Soul

Yawny²,

Lovey³

et al. 2007

Mat. Res.

View full text Add to dashboard Cite

A mechanical model for pseudoelastic behavior of NiTi wires is proposed with the aim to predict the behavior of Shape Memory Alloys(SMA) damping wire elements in model structures. We have considered at first a simple linearwise stress-strain relationship to describe the basic isothermal behavior of the SMA members. Then, this basic model is modified in order to include the effect of the strain rate. The model is based on detailed experimental characterization performed on a Ni rich NiTi superelastic wire which included the study of the localized character of the deformation and the local heat generation associated with the stress induced martensitic transformation occurring in these alloys. Heat conduction along the wire and heat interaction with the surroundings was also considered. In that way, the resulting local temperature field around the transformation front is assessed and its effect on the progression of the transformation is evaluated. It is shown how the simple mechanical model reproduces the global mechanical behavior, including the existence of a maximum in the damping capacity with the transformation rate.

show abstract

“…Indeed, SMA behavior has been investigated at all scales (microscopic, mesoscopic with volume fractions, macroscopic) and by means of a full menagerie of modelling perspectives. Even restricting to the realm of macroscopic-phenomenological models (which is the focus of this paper), the different modelling options available are many and diversified and the corresponding cross-validation is still under assessment [6,18,19,21,22,27,28,[35][36][37][38][39]42,43]. On the contrary, the mathematical treatment of full thermo-mechanical problems for SMAs is less developed for the only comprehensive results in this sense refer to either the original formulations or modifications of the Frémond [19] and the Falk and Konopka [17,18] models.…”

Section: Introductionmentioning

confidence: 99%