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Article Dans Une Revue Materials Science Forum Année : 2007

Microtexture Development and Flow Stress Saturation during Triaxial Forging of an Al-3Mg-Sc(Zr) Alloy

Résumé

An Al-3%Mg-0.25%Sc-0.12%Zr alloy was deformed by triaxial forging at 20-400 °C up to strains of about 3. A study of its textural evolution reveals the tendency towards three symmetrical variants of a <110><110><001> component. This experimental observation is supported by a 3D spatially resolved crystal plasticity analysis. Samples strained at room temperature undergo grain fragmentation in the form of fine substructures and relatively weak textures. Conversely, at 300 °C and above, more homogeneous intergranular deformation and rotations give rise to stronger textures. This eventually encourages grain coalescence and thus the development of interpenetrating "orientation chains", creating a new type of microstructure. The influence of this texture development on the specific work hardening behaviour is discussed.

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Matériaux
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Dates et versions

hal-00294171 , version 1 (08-07-2008)

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S. Ringeval, Julian H. Driver, David Piot. Microtexture Development and Flow Stress Saturation during Triaxial Forging of an Al-3Mg-Sc(Zr) Alloy. Materials Science Forum, 2007, 546-549, pp.793-800. ⟨10.4028/www.scientific.net/MSF.546-549.793⟩. ⟨hal-00294171⟩
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