The effect of iron and the precipitation behavior of iron during annealing of a cold deformed commercial purity aluminium alloy

Iron is always present in any aluminium alloy and usually as an impurity element. In commercial purity alloys the concentration of iron is typically so large that iron has a strong influence on the material properties, due to its slow diffusivity and low solubility in aluminium. In the present work the effect of iron in solid solution and the precipitation behavior of iron during annealing of a colddeformed commercial purity aluminium alloy have been investigated. Iron in solution is found to have a strong retarding effect on the softening kinetics. The resulting recrystallization texture has a distinct Cube component and some weak deformation texture components. By additional cold rolling and inter-annealing, the solute content is reduced significantly by precipitation of mainly Al3Fe and some α-AlFeSi phases. Doing so speeds up the softening kinetics by a factor of ~1000 and causes a considerable strengthening of the Cube component in the recrystallized texture

A Solute Pinning Approach to Solute Drag in Multi-Component Solid Solution Alloys

The Cahn, Lücke and Stüwe theory remains the backbone of more complex analysis dealing with solute drag, however, the mathematical treatment is rather involved. A new approach based on solute pinning the boundary has therefore recently been suggested, which has the main advantage of a simpler mathematical treatment. In the present paper this approach has been generalized to take into account the influence of different types of so- lute atoms in the high solute content/low driving force regime

A Solute Pinning Approach to Solute Drag in Multi-Component Solid Solution Alloys

Open Access tidsskrift. http://www.scirp.org/journal/mnsms/The Cahn, Lücke and Stüwe theory remains the backbone of more complex analysis dealing with solute drag, however, the mathematical treatment is rather involved. A new approach based on solute pinning the boundary has therefore recently been suggested, which has the main advantage of a simpler mathematical treatment. In the present paper this approach has been generalized to take into account the influence of different types of so- lute atoms in the high solute content/low driving force regime.Forlagets publiserte versjon. Open access. Copyright © 2014 Emmanuel Hersent et al. This is an open access article distributed under the Creative Commons Attribution Li- cense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In accordance of the Creative Commons Attribution License all Copyrights © 2014 are reserved for SCIRP and the owner of the intel- lectual property Emmanuel Hersent et al. All Copyright © 2014 are guarded by law and by SCIRP as a guardian

The Effect of Solute Atoms on Grain Boundary Migration: A Solute Pinning Approach

The effect of solute atoms on grain boundary migration has been modeled on the basis of the idea that solute atoms will locally perturb the collective rearrangements of solvent atoms associated with boundary migration. The consequence of such perturbations is cusping of the boundary and corresponding stress concentrations on the solute atoms which will promote thermal activation of these atoms out of the boundary. This thermal activation is considered to be the rate-controlling mechanism in boundary migration. It is demonstrated that the current statistical approach is capable of explaining, in phenomenological terms, the known effects of solute atoms on boundary migration. The experimental results of the effect of copper on boundary migration in aluminum, due to Gordon and Vandermeer, have been well accounted for

On the Effect of Atoms in Solid Solution on Grain Growth Kinetics

The discrepancy between the classical grain growth law in high purity metals (grain size D∝t1/2D∝t1/2) and experimental measurements has long been a subject of debate. It is generally believed that a time growth exponent less than 1/2 is due to small amounts of impurity atoms in solid solution even in high purity metals. The present authors have recently developed a new approach to solute drag based on solute pinning of grain boundaries, which turns out to be mathematically simpler than the classic theory for solute drag. This new approach has been combined with a simple parametric law for the growth of the mean grain size to simulate the growth kinetics in dilute solid solution metals. Experimental grain growth curves in the cases of aluminum, iron, and lead containing small amounts of impurities have been well accounted for