The Effect of Hot Deformation on Dispersoid Evolution in a Model 3xxx Alloy

Joseph D. Robson; Thomas Hill; Nicolas Kamp

doi:10.4028/www.scientific.net/MSF.794-796.697

Paper Titles

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Through Process Modelling of Extrusion for AA3xxx Alloys
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Thermal Stability of Al-Cu-Mg Alloys
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The Effect of Hot Deformation on Dispersoid Evolution in a Model 3xxx Alloy
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Study of Aging Precipitation of Al-Zn-Mg Alloys with Er Additions by Monte Carlo Simulation
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Constitutive Analyses of Tensile Tests on Pre-Rolled AA3003 Sheets
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An Advanced Dynamic Repair of Edge Crack Aluminum Plate with a Composite Patch
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Modelling the Combined Effect of Room Temperature Storage and Cold Deformation on the Age-Hardening Behaviour of Al-Mg-Si Alloys-Part 2
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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796The Effect of Hot Deformation on Dispersoid...

The Effect of Hot Deformation on Dispersoid Evolution in a Model 3xxx Alloy

Abstract:

The influence of hot deformation on the evolution of size, shape, and fraction of dispersoids has been studied in a simple 3xxx aluminium alloy by means of hot torsion testing. It has been shown that at high strain rates, deformation leads to spheroidization of the dispersoids, an increase in number density, and an increase in volume fraction. The increase in number density and volume fraction are associated with precipitation of new particles. The enhancement of manganese diffusion is a key factor in promoting rapid dispersoid evolution during deformation. A model has been developed to estimate the effect of deformation induced vacancies and dislocations on diffusion. This predicts that an order of magnitude increase in diffusion coefficient between may occur under typical hot deformation conditions, consistent with the rapid microstructural changes measured experimentally.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

697-703

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.697

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Online since:

June 2014

Authors:

Joseph D. Robson*, Thomas Hill, Nicolas Kamp

Keywords:

Aluminium Alloy, Deformation, Dispersoid

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