An Atomistic-Informed Phase-Field Model for Non-Isothermal Phase Transformation and Plasticity in Yttria-Stabilized Tetragonal Zirconia

2019 ◽  
Author(s):  
Cheikh Cissé ◽  
Mohsen Asle Zaeem
Keyword(s):  
Phase Transformation ◽  
Phase Field ◽  
Field Model ◽  
Tetragonal Zirconia ◽  
Phase Field Model

scholarly journals Study of the Fracture Behavior of Tetragonal Zirconia Polycrystal with a Modified Phase Field Model

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4430 ◽  
Author(s):  
Jingming Zhu ◽  
Jun Luo ◽  
Yuanzun Sun
Keyword(s):  
Phase Transformation ◽  
Crack Propagation ◽  
Phase Field ◽  
Fracture Behavior ◽  
Tetragonal Zirconia ◽  
Finite Size ◽  
Phase Field Model ◽  
Crack Tip ◽  
Propagation Mode ◽  
Tetragonal Zirconia Polycrystal

The superior fracture toughness of zirconia is closely correlated with stress-induced martensitic phase transformation around a crack tip. In this study, a modified phase field (PF) model coupling phase transformation and fracture is proposed to study the fracture behavior and toughening effect of tetragonal zirconia polycrystal (TZP). The stress-induced tetragonal to monoclinic (t–m) phase transformation around a static or propagating crack is characterized with PF simulations. It is shown that the finite size and shape of the transformation zone under different loads and ambient temperatures can be well predicted with the proposed PF model. The phase transformation may decrease the stress level around the crack tip, which implies the toughening effect. After that, crack propagation in TZP is studied. As the stress field is perturbed by the phase transformation patterns, the crack may experience deflection and branching in the propagation process. It is found that the toughness of the grain boundaries (GBs) has important influences on the crack propagation mode. For TZP with strong GBs, the crack is more likely to propagate transgranularly while, for TZP with weak GBs, intergranular crack propagation is prevalent. Besides that, the crystal orientation and the external load can also influence the topology of crack propagation.

An Approach for Modeling Transformation Plasticity Using a Phase Field Model

2011 ◽  
Vol 320 ◽  
pp. 285-290 ◽  
Author(s):  
Takuya Uehara
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Phase Field ◽  
Transformation Temperature ◽  
Field Model ◽  
Volume Fraction ◽  
Phase Field Model ◽  
Field Variable ◽  
Transformation Plasticity ◽  
Temperature Strain

In this paper, an approach for modeling transformation plasticity using a phase field model is presented. A conventional formula is utilized to represent the strain due to transformation plasticity as well as thermal expansion and transformation dilatation. A phase-field variable is introduced to express the state of phase in material instead of volume fraction, and numerical simulations under simplified conditions are demonstrated. As a result, the strain induced by phase transformation is suitably regenerated, and qualitatively appropriate temperature-strain curves are obtained. In addition, the effect of each parameter is investigated, and various dependencies, such as transformation temperature and stress, on the induced strain are demonstrated. It is then concluded that the results indicate the applicability of the presented model for practical use by adjusting the parameters.

A phase field model for phase transformation in an elastically stressed binary alloy

2005 ◽  
Vol 13 (3) ◽  
pp. 299-319 ◽  
Author(s):  
Dong-Hee Yeon ◽  
Pil-Ryung Cha ◽  
Ji-Hee Kim ◽  
Martin Grant ◽  
Jong-Kyu Yoon
Keyword(s):  
Phase Transformation ◽  
Binary Alloy ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model

Anisotropic Li intercalation in a LixFePO4 nano-particle: a spectral smoothed boundary phase-field model

2016 ◽  
Vol 18 (14) ◽  
pp. 9537-9543 ◽  
Author(s):  
L. Hong ◽  
L. Liang ◽  
S. Bhattacharyya ◽  
W. Xing ◽  
L. Q. Chen
Keyword(s):  
Phase Transformation ◽  
Boundary Conditions ◽  
Phase Field ◽  
Composite Electrode ◽  
Field Model ◽  
Phase Field Model ◽  
Boundary Phase ◽  
Nano Particle

Spectral smoothed boundary phase-field model for studying phase transformation and implementing boundary conditions in a heterogeneous composite electrode.

scholarly journals 123 Simulation of Phase Transformation using Elastoplastic Phase-Field Model

2008 ◽  
Vol 2008.21 (0) ◽  
pp. 402-403
Author(s):  
Akinori YAMANAKA ◽  
Tomohiro TAKAKI ◽  
Yoshihiro TOMITA
Keyword(s):  
Phase Transformation ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model
Sign in / Sign up

Export Citation Format

Share Document