On Structural Stability of Nanostructured Aluminium

E.J. Van Der Kolff; M. Berkahn; Richard Wuhrer; Wing Yiu Yeung

doi:10.4028/www.scientific.net/MSF.475-479.3501

Paper Titles

Textures and Grain Growth in Nanocrystalline Fe-Ni Alloys
p.3483

Softening Phenomenon during Compression Test in Nanograined Aluminum Alloys
p.3489

Fabrication and Property of Amorphous/Nano Crystalline Al₈₄Ni₁₀Ce₆ Bulk Alloy by a Powder Forging
p.3493

Mechanical Properties of SPD (Severe Plastic Deformation) Processed Copper
p.3497

On Structural Stability of Nanostructured Aluminium
p.3501

Structure Changes in Stainless Steels Used in Nuclear Reactors and Turbo Generators after Minor Low Cycle Fatigue Deformation
p.3505

A New Method for Bulk-Quantity Synthesis of Patterned Well-Aligned ZnO Nanowire Arrays
p.3509

Large-Scale Synthesis of In₂O₃ Nanowires and Their Characterization
p.3513

Low Temperature Synthesis of PbTiO₃ Nanoparticles
p.3517

HomeMaterials Science ForumMaterials Science Forum Vols. 475-479On Structural Stability of Nanostructured...

On Structural Stability of Nanostructured Aluminium

Abstract:

Nano- and submicron-structured aluminium was produced by equal channel angular extrusion with a total strain of ~17. Large residual stress and strain energy were built up in the extruded metal and subsequent heat treatments were applied to investigate the stability of the nanostructures. X-ray diffractometry and transmission electron microscopy were performed to evaluate the microstructural changes in the nanograin metal. It was found that the nanostructures remained stable at temperatures up to 250oC. Above 250oC, changes in the major x-ray peak reflections became evident, suggesting substantial grain growth had occurred. Electron microscopy confirmed that at low annealing temperatures, the fine grain structures were stable and indeed became more equiaxed and well defined.