Effect of Pre-Rolling Reduction on Intergranular Corrosion of Aluminum Alloy 2519A

Y. Liu; Xin Ming Zhang; B. Liu; Hui Zhong Li; Hui Gao

doi:10.4028/www.scientific.net/MSF.546-549.1117

Paper Titles

Study on Microstructural Evolution and Age Hardening in High-Purity Al-Cu-Mg-Ag Alloy
p.1081

Flow Field and Gas-Bubble Size Analysis in Water Model for the Process of Aluminum Melt Degassing by Particle Image Velocimetry
p.1087

Corrosion Behavior of Metallic Materials in Ethanol-Gasoline Alternative Fuels
p.1093

Structural Characterization and Corrosion Properties of BTESPT Silane Films on Surface of 2024-T6 Aluminium Alloy
p.1111

Effect of Pre-Rolling Reduction on Intergranular Corrosion of Aluminum Alloy 2519A
p.1117

Influence of the Nickel on the Corrosion Behavior of Al-Mg-Sc-Zr Alloy
p.1123

Thermal Stability of Nanocrystallized Surface Layer in Al-Zn-Mg Alloy by Surface Mechanical Attrition Treatment
p.1129

Surface Morphology and Discharge Channel Temperature Estimation of PEO Ceramic Coatings on Aluminum
p.1135

Effects of HTCA on Microstructure and Surface Morphology of Porous Anodic Alumina Membrane
p.1141

HomeMaterials Science ForumMaterials Science Forum Vols. 546-549Effect of Pre-Rolling Reduction on Intergranular...

Effect of Pre-Rolling Reduction on Intergranular Corrosion of Aluminum Alloy 2519A

Abstract:

The effect of pre-rolling reduction prior to ageing on the size and distribution of the precipitates, the width of precipitation free zones (PFZ) along grain boundaries and intergranular corrosion (IGC) of aluminum alloy 2519A were investigated by hardness tests, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results showed that the time for peak-age shortened when the reduction increased, which resulted in refining the precipitatates and distributing homogeneously within the grains and hence the IGC decreased. With increasing pre-rolling reduction, the PFZ along grain boundaries became narrower and precipitates changed from continuous chains to discrete distribution, which resulted in high IGC resistance.