Improve sensitization and corrosion resistance of an Al-Mg alloy by optimization of grain boundaries.

ABSTRACT: The sensitization and subsequent intergranular corrosion of Al-5.3 wt.% Mg alloy has been shown to be an important factor in stress corrosion cracking of Al-Mg alloys. Understanding sensitization requires the review of grain boundary character on the precipitation process which can assist in developing and designing alloys with improved corrosion resistance. This study shows that the degree of precipitation in Al-Mg alloy is dependent on grain boundary misorientation angle, adjacent grain boundary planes and grain boundary types. The results show that the misorientation angle is the most important factor influencing precipitation in grain boundaries of the Al-Mg alloy. Low angle grain boundaries (≤15°) have better immunity to precipitation and grain boundary acid attack. High angle grain b

SUBMITTER: Yan J 

PROVIDER: S-EPMC4882518 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature