Interaction of martensitic transformations and vacancy diffusion at the nanoscale under thermal loading: a phase field model and simulations

Javanbakht, Mahdi; Ghaedi, Mohammad Sadegh

doi:10.1007/s00707-021-03067-5

Cited by 4 publications

(2 citation statements)

References 97 publications

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“…In recent research [ 11 , 12 , 13 ], the focus was primarily on phase field modeling and the simulation of martensite transformation and structural defect interaction under the thermal loading or martensite reorientation and de-twinning process. It can be seen that the evolution of microstructural constituents helps to understand microstructural mechanisms and their overall effect on the optimum performances of alloys.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

et al. 2022

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This paper discusses the effect of different heat treatment procedures on the microstructural characteristics, damping capacities, and mechanical properties of CuAlNi shape memory alloys (SMA). The investigation was performed on samples in the as-cast state and heat treated states (solution annealing at 885 °C/60’/H2O and after tempering at 300 °C/60’/H2O). The microstructure of the samples was examined by light microscopy (LM) and scanning electron microscopy (SEM) equipped with a device for energy dispersive spectrometry (EDS) analysis. Light and scanning electron microscopy showed martensitic microstructure in all investigated samples. However, the changes in microstructure due to heat treatment by the presence of two types of martensite phases (β1’ and γ1’) influenced alloy damping and mechanical properties by enhancing alloy damping characteristics. Heat treatment procedure reduced the alloys’ mechanical properties and increased hardness of the alloy. Fractographic analysis of the alloy showed a transgranular type of fracture in samples after casting. After solution annealing, two types of fracture mechanisms can be noticed, transgranular and intergranular, while in tempered samples, mostly an intergranular type of fracture exists.

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Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

et al. 2022

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“…Therefore, computer simulation technology with an accurate description of nanocrack details has become an important means to study material cracks [14][15][16][17][18]. For example, Javanbakht et al [19] investigated the interaction of nanoscale martensitic transformations and vacancy diffusion at the nanoscale under thermal loading using phase field method; Jafarzadeh and Ghaedi [20] studied phase field modeling of crack growth with double-well potential including surface effects; Farrahi et al [21] performed the phase field modeling of crack growth and analytical treatment on the parameters.…”

Section: Introductionmentioning

confidence: 99%

Phase field crystal simulation of gap healing at nanoscale

Li¹,

Ying-jun²,

Yi³

et al. 2022

Modelling Simul. Mater. Sci. Eng.

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The phase field crystal method is used to simulate the healing process of the central gap of 3-dimensional BCC crystal material under compression strain at the atomic level. It is found that during the healing process of the central gap, the gap protrudes at both ends of it, leading to dislocation nucleation and vacancy formation. Then, by means of dislocation nucleation and dislocation emission mechanism at both ends of the gap, the thickness of the gap is reduced by one layer of atoms, and the atomic layer on the gap surface shrinks towards each other. Through the mechanism of dislocation nucleation and dislocation emission, the thickness of gap is reduced layer by layer, and finally the connection and closure of the lattice atoms on up and down surface of the gap is achieved, and the surface healing of the central gap is realized. According to the sharpening and passivation mechanism of the lattice atomic planes at both ends of the gap, the elliptic shape gap is approximated to calculate and analyze the influence of the change of stress intensity factor during the gap healing, and the critical condition of the gap dislocation emission is determined.

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Phase field modeling of topological magnetic structures in ferromagnetic materials: domain wall, vortex, and skyrmion

et al. 2022

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Interaction of martensitic transformations and vacancy diffusion at the nanoscale under thermal loading: a phase field model and simulations

Cited by 4 publications

References 97 publications

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

Phase field crystal simulation of gap healing at nanoscale

Phase field modeling of topological magnetic structures in ferromagnetic materials: domain wall, vortex, and skyrmion

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