Effect of high-temperature deep rolling on cyclic deformation behavior of solution-heat-treated Al-Mg-Si-Cu alloy

A newly developed mechanical surface treatment, high-temperature deep rolling, was performed on the solution-heat-treated aluminium alloy AA6110 (Al-Mg-Si-Cu) for different deep-rolling temperatures up to 250 degrees C. Near-surface properties, e.g. macroscopic compressive residual stresses, work hardening and hardnesses, are presented. Cyclic deformation behavior and S-N curves of the high-temperature deep-rolled solution-heat-treated AA6110 have been investigated at room temperature and at elevated temperatures up to 250 degrees C and compared to conventional deep rolling (deep rolling at room temperature) using stress-controlled push-pull fatigue tests. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.