Grain-Size Dependency of Low-Temperature Creep in Ultrafine-Grained Aluminum

Eiichi Sato; Yuto Komiyama; Yoshimitsu Sato

doi:10.4028/www.scientific.net/MSF.794-796.302

Paper Titles

Effect of Cold Plastic Deformation Prior to Ageing on Creep Resistance of an Al-Cu-Mg-Ag Alloy
p.278

Influence of Processing Route on the Work-Hardening and Ductile Fracture of an AA6060 Aluminium Alloy
p.284

Effect of Electroless Ni-P Plating on the Fatigue Strength of Dilute Al-Si Alloys
p.290

Influence of Particles on Short Fatigue Crack Initiation in 2050-T8 and 7050-T74
p.296

Grain-Size Dependency of Low-Temperature Creep in Ultrafine-Grained Aluminum
p.302

Extrapolation of Creep Curve and Creep Rate by Strain Acceleration Parameter in Al-Mg Solid Solution Alloys
p.307

Analysis of Small Fatigue Crack in Al-Mg-Si Aluminum Alloy
p.313

Modeling of the Influence of Pore Morphology on Damage Behavior of an Aluminum Die Casting Alloy
p.319

Effect of Micro-Voids on Crack Initiation and Propagation in Bending Deformation of Al-Mg-Si Alloy Sheet
p.325

HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Grain-Size Dependency of Low-Temperature Creep in...

Grain-Size Dependency of Low-Temperature Creep in Ultrafine-Grained Aluminum

Abstract:

The grain size dependence of creep behavior from coarse grain to ultrafine grain regions was examined using fully-annealed specimens fabricated from a single process route. For coarse-grained sample, in tensile deformation, stress-strain curves show slow work hardening, and the proof stress shows typical Hall-Petch behavior. On the other hand, creep behavior is observed under the stress above the proof stress, and the creep rate has no grain size dependence. For ultrafine-grained sample, in the tensile deformation, stress-strain curves show yielding behavior, and the yield stress shows Hall-Petch behavior also. On the other hand, creep behavior was observed below the proof stress, but the creep rate decreases with a decrease in grain size.