Computer simulation of grain growth with second phase particle pinning

The pinning effect of second phase particles on grain growth was simulated by 2-D Monte Carlo simulations. A new variable, the degree of contact between grain boundaries and second phase particles, was introduced to predict the grain size limit in the presence of second phase particles. The modified...

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Vydané v:Acta materialia Ročník 45; číslo 9; s. 3653 - 3658
Hlavní autori: Gao, Jinhua, Thompson, Raymond G., Patterson, Burton R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Oxford Elsevier Ltd 01.09.1997
Elsevier Science
Predmet:
Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Physics
Treatment of materials and its effects on microstructure and properties
Crystal growth
Grain size
Grain boundaries
Monte Carlo method
Grain growth
Volume fraction
Pinning
Theoretical study
Polycrystals
Two dimensional model
Recrystallization
Numerical simulation
Inhibition
Microstructure
ISSN:1359-6454, 1873-2453
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Popis
Shrnutí:The pinning effect of second phase particles on grain growth was simulated by 2-D Monte Carlo simulations. A new variable, the degree of contact between grain boundaries and second phase particles, was introduced to predict the grain size limit in the presence of second phase particles. The modified Zener pinning model containing this new variable can be expressed as: D r = K Rf , where D is the pinned grain size, r is the mean size of second phase particles, K is a constant, f is the area fraction (or the volume fraction in 3-D) of second phase, and R is the degree of contact between grain boundaries and second phase particles. In 2-D Monte Carlo simulations of grain growth the ratio of pinned grain size to second phase particle size was found to be proportional to f −0.5, but also to ( Rf) −1. The degree of contact increased during grain growth and reached a stable value when the grain structure was pinned. The initial location of second phase particles did not have a significant contribution to the pinning of grain boundaries.
ISSN:1359-6454
1873-2453
DOI:10.1016/S1359-6454(97)00048-7