Recrystallization and Grain Growth due to Annealing of an Ultrafine-Grained Al Alloy

Aicha Loucif; Roberto B. Figueiredo; Thierry Baudin; François Brisset; Terence Langdon

doi:10.4028/www.scientific.net/MSF.753.303

Paper Titles

Effects of Widening during Rolling on the Subsequent Recrystallization Kinetics of Copper
p.285

EBSD Investigation of Cold Rolled and Recrystallized Titanium
p.289

Recrystallization Texture of Heavily Cold Rolled Polycrystalline Nickel Sheets with and without Strong Starting Cube Texture
p.293

Recrystallisation of Magnesium Alloys Containing Rare-Earth Elements
p.297

Recrystallization and Grain Growth due to Annealing of an Ultrafine-Grained Al Alloy
p.303

Observation of Growth Front on the Initial Stage of Goss Abnormally-Growing Grain in Fe-3%Si Steel
p.307

Development of Boundary Misorientations During Grain Growth in Silicon Steels
p.311

Abnormal Grain Growth in Nanocrystalline Materials
p.317

Strain Induced Abnormal Grain Growth in Nickel Base Superalloys
p.321

HomeMaterials Science ForumMaterials Science Forum Vol. 753Recrystallization and Grain Growth due to...

Recrystallization and Grain Growth due to Annealing of an Ultrafine-Grained Al Alloy

Abstract:

The evolution of the recrystallization microstructure at different temperatures and the related change in the microhardness were studied in an Al-6061 alloy after 2 turns of high-pressure torsion (HPT) by means of Vickers microhardness and EBSD analysis. The corresponding results show that HPT processing introduces a significant grain size refinement for the deformed state by comparison with the 150 µm grain size in the initial material. The microstructure after annealing at 200°C is relatively close to the as-processed one and the distribution of misorientation angles remains essentially unchanged. However, significant microstructural changes are produced with increasing annealing temperature and at the highest temperature (400°C) there is an abnormal grain growth. The variation of Vickers microhardness (Hv) after the different annealing treatments show a gradual decrease when the temperature increases.