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On the Intergranular Corrosion and Hardness Evolution of 6xxx Series Al Alloys as a Function of Si:Mg Ratio, Cu Content, and Aging Condition

journal contribution
posted on 2023-08-30, 04:11 authored by SK Kairy, PA Rometsch, CHJ Davies, N Birbilis
The intergranular corrosion (IGC) and hardness associated with 6xxx series aluminum alloy sheets, varying in composition (namely Si:Mg ratio and Cu content), were systematically studied in four different aging conditions. The IGC of each alloy was studied using ASTM G110, scanning electron microscopy, and optical microscopy. Scanning transmission electron microscopy was also used to rationalize the grain boundary chemistry of the relevant alloys. It was revealed that the severity of IGC depends on the continuity and type of grain boundary phases. The property space reported herein reveals prospects for the optimization of 6xxx series alloy compositions.

History

Journal

Corrosion

Volume

73

Pagination

1280-1295

Location

Houston, Tex.

ISSN

0010-9312

eISSN

1938-159X

Language

English

Publication classification

C1.1 Refereed article in a scholarly journal

Issue

10

Publisher

NATL ASSOC CORROSION ENG