Grain boundary pinning by Al6Mn precipitates in an Al–1wt%Mn alloy

Rios, Paulo Rangel; Fonseca, Gláucio Soares da

doi:10.1016/j.scriptamat.2003.09.031

Cited by 40 publications

(23 citation statements)

References 9 publications

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“…Zener [34], originally considered that β = 4. This value is actually overestimated as several experimental and modelling work seem to prove that the correct expression of the driving pressure for grain growth in polycristalline materials is four times lower [35][36][37][38]. Thus, β is taken equal to 1 in the present work.…”

Section: Accepted Manuscriptmentioning

confidence: 84%

Precipitation and grain growth modelling in Ti-Nb microalloyed steels

et al. 2019

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Mechanical properties of microalloyed steels are enhanced by fine precipitates, that ensure grain growth control during subsequent heat treatment. This study aims at predicting austenite grain growth kinetics coupling a precipitation model and a grain growth model. These models were applied to a titanium and niobium microalloyed steel. The precipitate size distributions were first characterized by TEM and SEM and prior austenite grain boundaries were revealed by thermal etching after various isothermal treatments. From CALPHAD database, a solubility product was determined for (Ti,Nb)C precipitates. A numerical model based on the classical nucleation and growth theories was used to predict the time evolution of (Ti,Nb)C size distributions during various isothermal heat treatments. The precipitation model was validated from TEM/SEM analysis. The resulting precipitate size distributions served as entry parameters to a simple grain growth model based on Zener pinning. The pinning pressure was calculated using the whole size distribution. The resulting austenite grain growth kinetics were in good agreement with the experimental data obtained for all investigated heat treatments.

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Section: Accepted Manuscriptmentioning

confidence: 84%

Precipitation and grain growth modelling in Ti-Nb microalloyed steels

et al. 2019

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“…Rios also showed [100][101][102] that the pinning force could be written in terms of the interface area per unit volume of particles, S VP :…”

Section: Retarding Forces Due To Particlesmentioning

confidence: 99%

Nucleation and growth during recrystallization

Rios¹,

Siciliano

Sandim³

et al. 2005

Mat. Res.

262

143

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The evolution in the understanding of the recrystallization phenomena is summarized in this paper. Initially the main developments concerning recrystallization are presented from a historical perspective. Definitions and concepts involving recrystallization are presented regarding it as a solid-state reaction that occurs by nucleation and growth. The recrystallization nucleation mechanisms are subsequently discussed. Finally, the growth step is highlighted, emphasizing boundary and sub-boundary mobilities and the forces acting on the high angle grain boundaries that sweep the microstructure during recrystallization.

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“…In practice, one will use the numerical expression for particle pinning that better describes reality. The available evidence suggests that the best agreement between the characteristics of the particle dispersion and the limiting grain radius is given by Rios [5] or Rios and Fonseca [55] expressions. (c) Initiation of AGG.…”

Section: Discussionmentioning

confidence: 99%

Critical assessment 30: Grain growth – Unresolved issues

Rios

Zöllner

2018

Materials Science and Technology

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Grain growth is a broad field of study that covers several scientifically and technically interesting characteristics. Normal grain growth kinetics and its associated parabolic growth law and self-similar size distributions, grain boundary pinning, abnormal grain growth, the effect of triple junctions and quadruple points as well as grain growth in thin films are the most important current topics of grain growth research. In this critical assessment of grain growth in metals, we present and discuss some of the most important unresolved issues that have been a subject of research for many years.

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Grain boundary pinning by Al6Mn precipitates in an Al–1wt%Mn alloy

Cited by 40 publications

References 9 publications

Precipitation and grain growth modelling in Ti-Nb microalloyed steels

Precipitation and grain growth modelling in Ti-Nb microalloyed steels

Nucleation and growth during recrystallization

Critical assessment 30: Grain growth – Unresolved issues

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