Superplastic Improvement of Aluminum 7475-T4 Industrial Sheets Using a Heat Treatment

Patrick Romilly

doi:10.4028/www.scientific.net/MSF.735.332

Paper Titles

Low Temperature Superplasticity of Hydrostatically Extruded Mg-Al-Zn Alloys
p.307

Microstructure Control and Mechanical Properties of Multipass Friction Stir Processed High Strength Aluminum Alloy
p.316

New Type of Ultra-Fine Grained Microstructure in Ti-6Al-4V Alloy for Enhancing Superplasticity
p.322

Effect of Severe Caliber Rolling on Superplastic Properties of Mg-3Al-1Zn (AZ31) Alloy
p.327

Superplastic Improvement of Aluminum 7475-T4 Industrial Sheets Using a Heat Treatment
p.332

Elevated Temperature Forming of Titanium Aircraft Hardware
p.338

Low-Temperature Superplasticity in an Al–Mg–Mn Alloy Subjected to ECAP and Subsequent Isothermal Rolling
p.347

Superplasticity in a 5024 Aluminium Alloy Processed by Severe Plastic Deformation
p.353

Recent Application of Superformed 5083 Aluminum Alloy in the Aerospace Industry
p.361

HomeMaterials Science ForumMaterials Science Forum Vol. 735Superplastic Improvement of Aluminum 7475-T4...

Superplastic Improvement of Aluminum 7475-T4 Industrial Sheets Using a Heat Treatment

Abstract:

Aeronautic industry requires a high degree of precision on final thickness of superplastically formed sheets. However, for the same qualified process, an important dispersal of results was observed on final thickness of superplastically formed aluminium 7475-T4 industrial sheets, depending on the delivered sheet batch. After several cases of sheet batches that led to unachieved acceptance limit or cracking of the sheets during the process, ACB investigated aluminium 7475-T4 sheets quality at microscopic scale. Important grain size dispersal was observed and a heat treatment was successfully applied on sheets to diminish the grain size and improve the superplasticity of the sheets.