Phase-field modeling of stacking structure formation and transition of δ-hydride precipitates in zirconium

Han, Guomin; Zhao, Yuhong; Zhou, Chengbo; Lin, De-Ye; Zhu, Xueyan; Zhang, J.; Hu, Shenyang; Song, Haifeng

doi:10.1016/j.actamat.2018.12.009

Cited by 55 publications

(42 citation statements)

References 73 publications

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“…The high strain area (orange) is nearly an ellipse with the maxima of 28.0% along the {101 ̅ 2.6 plane normal, which is 3.76° deviated from the most favorable orientation, i.e., {101 ̅ 3} interface plane normal. In fact, the energy of phase transformation can be adjusted by anisotropy interfacial energy through reducing the tilt angle of the hydride interface plane towards basal plane [14]. For P-type transition, the peak area (orange) of the strain IPF for Variant 1 in Fig.…”

Section: Strain Anisotropy Of α-Ti / δ-Hydride Phase Transformationmentioning

confidence: 99%

“…Han et al [14] proposed a micromechanical phase-field model for the formation and transition of the -hydrides stacking structure in Zr. The results suggest that hydride grows by repetitive nucleation, growth and coarsening near the pre-existing hydride platelet.…”

Section: Introductionmentioning

confidence: 99%

“…The results suggest that hydride grows by repetitive nucleation, growth and coarsening near the pre-existing hydride platelet. The applied stress can transform the orientation of macro-hydride stacking structure through shifting the energetically favored nucleation site on the pre-existing hydride [14]. Besides, the external stress can decreases the critical nucleation energy of the grain boundary (GB) normal to the stress direction and further induce hydride nucleation in it [15].…”

Section: Introductionmentioning

confidence: 99%

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Crystallographic orientation dependence of hydride precipitation in commercial pure titanium

Wang

Lecomte

et al. 2020

Acta Materialia

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Ti and its alloys have a variety of applications in aerospace industry and medical implants. The formation of hydride has been used in biomedical areas and can significantly influence the mechanical performance of materials. In this work, we investigate the orientation dependence of hydride precipitation in commercially pure titanium via interrupted in-situ electron backscatter diffraction (EBSD) measurements. The results reveal that hydrides during hydrogen charging at room t emperature exhibit two types of orientation relationships with α-titanium, i.e., {0001 α //{11 ̅ 1 <12 ̅ 10> α //<110> with interface plane {101 ̅ 3 α //{11 ̅ 0 (B-type), and {0001 α //{001 <12 ̅ 10> α //<110> with interface plane {101 ̅ 0 α //{11 ̅ 0 (P-type). Significant orientation dependence of hydride precipitation is observed, especially when *101 ̅ 3+, *101 ̅ 0+, *0001+ or *112 ̅ 0+ planes of the parent grains are parallel to the diffusion surface. The displacement gradient tensor based accommodation shows that the orientation 2 dependence is attributed to the strain relaxation of hydride transition. Three types of hydride platelets are characterized: parallel hydride platelets (Type I), crossed hydride platelets (Type II) and clustered hydride platelets (Type III). The multiple morphologies of hydride platelets resulting from the hydride variant selection and interaction are dependent on the crystal orientation of the matrix.

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Section: Strain Anisotropy Of α-Ti / δ-Hydride Phase Transformationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crystallographic orientation dependence of hydride precipitation in commercial pure titanium

Wang

Lecomte

et al. 2020

Acta Materialia

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“…A detailed account of phase field studies on hydride precipitation in zirconium alloys can be found in the works of Bair et al (2015) and Motta et al (2019). Quite recently, phase field studies analyzing the morphology and reorientation of hydride precipitates have also been reported, (see Bair and Zaeem, 2017;Han et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Most of our calculations, therefore, do not account for the effect of interfacial energy. In some cases, the interfacial energy, however, plays a significant role in the energetics of precipitation, (see Gill and Cocks, 2006;Massih and Jernkvist, 2009;Han et al, 2019). For an evolving microstructure, typically both the chemical energy and the elastic strain energy control the morphology and orientation of the precipitated phase.…”

Section: Introductionmentioning

confidence: 99%

A study of hydride precipitation in zirconium

Khan

Cocks

Chattopadhyay

2021

Mechanics of Materials

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Phase-field modelling: effect of an interface crack on precipitation kinetics in a multi-phase microstructure

2021

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Premature failures in metals can arise from the local reduction of the fracture toughness when brittle phases precipitate. Precipitation can be enhanced at the grain and phase boundaries and be promoted by stress concentration causing a shift of the terminal solid solubility. This paper provides the description of a model to predict stress-induced precipitation along phase interfaces in one-phase and two-phase metals. A phase-field approach is employed to describe the microstructural evolution. The combination between the system expansion caused by phase transformation, the stress field and the energy of the phase boundary is included in the model as the driving force for precipitate growth. In this study, the stress induced by an opening interface crack is modelled through the use of linear elastic fracture mechanics and the phase boundary energy by a single parameter in the Landau potential. The results of the simulations for a hydrogenated ($$\alpha +\beta $$ α + β ) titanium alloy display the formation of a precipitate, which overall decelerates in time. Outside the phase boundary, the precipitate mainly grows by following the isostress contours. In the phase boundary, the hydride grows faster and is elongated. Between the phase boundary and its surrounding, the matrix/hydride interface is smoothened. The present approach allows capturing crack-induced precipitation at phase interfaces with numerical efficiency by solving one equation only. The present model can be applied to other multi-phase metals and precipitates through the use of their physical properties and can also contribute to the efficiency of multi-scale crack propagation schemes.

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Phase-field modeling of stacking structure formation and transition of δ-hydride precipitates in zirconium

Cited by 55 publications

References 73 publications

Crystallographic orientation dependence of hydride precipitation in commercial pure titanium

Crystallographic orientation dependence of hydride precipitation in commercial pure titanium

A study of hydride precipitation in zirconium

Phase-field modelling: effect of an interface crack on precipitation kinetics in a multi-phase microstructure

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