Development of Intensiostatic-Galvanic Stress Corrosion Tests for High Strength Aluminum Alloys

Gordon, Joseph J.; Rinnovatore, James V.

doi:10.21236/ada002599

Cited by 1 publication

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“…Annealing type methods of relieving stress are not usually appropriate for precipitation hardened alloys as the temperature to effect major stress relief will be well above the aging temperature. This was illustrated by Orner and Kulin, 6 who demonstrated concomitant softening associated with stress relieving thermal treatments in precipitation hardened aluminium alloys. For simple configurations, significant stress relief can be induced by applying plastic deformation using stretching or cold compression immediately after quenching while the material is in a soft condition.…”

Section: Introductionmentioning

confidence: 91%

Influence of quenching and aging on residual stress in Al–Zn–Mg–Cu alloy 7449

Robinson

Tanner

Petegem

et al. 2012

Materials Science and Technology

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This investigation aimed to quantify the size and distribution of residual stresses remaining in rectilinear aluminium forged alloy blocks after they had been partially and fully heat treated. Various quench conditions were used including water at different temperatures and poly oxyethylene glycol (PAG) in two concentrations. The influence of standard and novel aging procedures including retrogression and reaging has been determined. Residual stresses were characterised using x-ray and neutron diffraction. Residual stress magnitudes were found to vary significantly with rapidity of cooling from the solution treatment temperature with the subsequent aging treatments having a much smaller effect. The influence of the heat treatments on mechanical properties of the alloy was predicted by means of quench factor analysis and measured using indentation hardness and tensile testing. Quench factor analysis is also used to predict the change in lattice parameter arising from different quench paths in the strain free reference samples (d 0 ).

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Section: Introductionmentioning

confidence: 91%