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

Yutaka Matsuda; Goroh Itoh; Yoshinobu Motohashi

doi:10.4028/www.scientific.net/MSF.735.316

Paper Titles

Microstructural Control of a Zn-22Al Alloy by Rolling Process
p.289

Extraordinary High Strain Rate Superplasticity of an Al-Mg-Sc-Zr Alloy Subjected to Equal Channel Angular Pressing
p.295

Research on Quick Superplastic Forming for Aluminium Alloy Sheet
p.301

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

HomeMaterials Science ForumMaterials Science Forum Vol. 735Microstructure Control and Mechanical Properties...

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

Abstract:

Friction stir processing (FSP) causes fine-equiaxed microstructure[1]. In this study, microstructure and mechanical properties of a 7075 aluminum alloy subjected to multipass FSP, MP-FSP, are assessed. A new zone, PBZ, has been discovered between stir zones, SZs. The SZs are composed of fine-equiaxed grains, while PBZs are composed of two types of (fine-equiaxed and coarse-elongated) grains, both of which are still finer than those of base metal. Elongation at 773K of MP-FSPed specimen becomes larger than that of base metal, based on superplastic deformation due to the finer microstructure. Local elongation is smaller in PBZ than in SZ.