Grain Boundary Area, Grain Boundary Curvature and Particle Pinning in an Al-1mass%Mn Alloy Containing Al6Mn Precipitates

Paulo Rangel Rios; G.S. Fonseca

doi:10.4028/www.scientific.net/MSF.467-470.991

Paper Titles

Measurement of Impurity Concentration at Grain Boundaries after Recrystallization
p.969

Static Recrystallization of FeAl in the Presence of Second Phase Particles: Experimental and Modeling Investigations
p.975

Introduction of Second Phase Particle Shape in Monte Carlo Grain Growth Simulation
p.981

Influence of Particle Mechanisms on Kinetics of Grain Growth in a P/M Superalloy
p.985

Grain Boundary Area, Grain Boundary Curvature and Particle Pinning in an Al-1mass%Mn Alloy Containing Al₆Mn Precipitates
p.991

In-Situ Quantification of Solute Effects on Grain Boundary Mobility and Character in Aluminum Alloys during Recrystallization
p.997

Temporal Evolution of Grain Size Distributions in Two-Dimensional Pinned Cells
p.1003

Finite Element Simulations of 3D Zener Pinning
p.1009

Evolving 3D Microstructures Using a Genetic Algorithm
p.1019

HomeMaterials Science ForumMaterials Science Forum Vols. 467-470Grain Boundary Area, Grain Boundary Curvature and...

Grain Boundary Area, Grain Boundary Curvature and Particle Pinning in an Al-1mass%Mn Alloy Containing Al₆Mn Precipitates

Abstract:

The usual expression to calculate the limiting grain radius due to particle pinning is RL=ar/f, where r is the particle radius, f is the volume fraction of the particles, RL is the limiting grain radius and a is a constant equal to 1/6 according to Rios[Acta Metall. Vol. 35 (1987) p. 2805]. This form is not convenient for comparison with experimental measurements. In this work two alternative expressions are proposed: 1)SVL=3SVP where SV is the grain boundary area per unit of volume and SVP is the interface area per unit of volume and 2)H=SVP where H is the total grain boundary curvature. These expressions are compared with experimental measurements carried out in a high purity Al-1mass%Mn alloy containing Al6Mn precipitates annealed for 3600 s at temperatures ranging from 500 to 620 oC. Good agreement is obtained between theory and experiment. The relative merits and shortcomings of each expression are discussed in detail from a fundamental and experimental point of view. It is concluded that the first expression is probably the best choice for practical purposes.