Discussion of 'On the Role of β Particles in Stress Corrosion Cracking of Mg-Al Alloys

摘要

I refer to the interesting communication by Winzer and Cross on the role of β particles in stress corrosion cracking of Mg-Al alloys in the February 2009 issue of Metallurgical and Materials Transactions A. I propose here that the potential presence of effectively invisible oxide bifilms (entrained double oxide films) in most metal alloys may explain many of the features of β particles (Mg_(17)Al_(12)) in the stress corrosion cracking of Mg-Al alloys.