Stress-Corrosion Cracking Property of Aluminum-Magnesium Alloy Processed by Equal-Channel Angular Pressing. (26th March 2012)

• Record Type: Journal Article
• Authors: Nakano, Hiroaki; Oue, Satoshi; Taguchi, Seiji; Kobayashi, Shigeo; Horita, Zenji
• Other Names: Nishimura Rokuro Academic Editor.
• Is Part Of: International journal of corrosion. Volume 2012(2012)
• Publication Date: 2012-03-26
• Subjects: Corrosion and anti-corrosives -- Periodicals; Corrosion and anti-corrosives; Periodicals; 620.11223
• DOI: 10.1155/2012/543212
• Languages: English
• ISSNs: 1687-9325

Abstract

Abstract : Stress-corrosion cracking property of an aluminum-magnesium alloy processed by equal-channel angular pressing (ECAP) was investigated by a slow strain-rate tensile technique in a 3% NaCl solution of pH 4.2 at 303 K. The maximum stress and elongation of the Al-Mg alloy were lower in the NaCl solution than in air. The stress-corrosion cracking property was evaluated by the decrease ratio of maximum stress and elongation of the Al-Mg alloy with NaCl solution, I ( δ max ) and I ( δ ), respectively. I ( δ max ) and I ( δ ) were lower with ECAP than without it, showing that the susceptibility of stress-corrosion cracking decreased with ECAP. The polarization curve and time dependence of the anodic current density at constant potential of the Al-Mg alloy in the NaCl solution revealed that the anodic current density was lower with ECAP than without it, or the corrosion resistance of the Al-Mg alloy was improved by ECAP. The decrease in stress-corrosion crack susceptibility of the Al-Mg alloy with ECAP is attributed to an improvement in corrosion resistance afforded by ECAP.