Journal
JOURNAL OF MAGNESIUM AND ALLOYS
Volume 10, Issue 7, Pages 1846-1856Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2022.01.013
Keywords
Solidification microstructure; Grain refinement; Solute elements
Categories
Ask authors/readers for more resources
This article examines the impact of solutes on grain formation, with experimental data suggesting a clear correlation between grain size and the solidification range of the alloy. Mechanisms related to grain refining operate under specific experimental conditions.
The effect of solutes on grain formation has been studied over a century but is still under debating, simply because it is a very complex topic. This article focuses on the effect of dissolved solute on the growth, fragmentation of a dendrite and the resultant grain size. Experimental data on grain size in magnesium and aluminum alloys with various solute concentrations are collected and analyzed using phase diagram variables including Q, P , and AT . The physical meaning of each phase diagram variable is discussed. Curve fitting of the recently proposed two-parameter models with experimental data suggests that there is a clear correlation between the measured grain size and the solidification range of the alloy over the entire range of the hypoeutectic composition. Such a trend of grain size vs. AT is closely related to the grain refining mechanisms operating under relevant experimental conditions. A critical review of the grain refining mechanisms indicates that the mechanisms associated with the dendrite fragmentation are operating under the conditions where convection is substantial in the melt during its solidification. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer review under responsibility of Chongqing University
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available