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has been cited by the following article:

• TITLE: The Influence of Heat Treatment on the Caustic Etching Behaviour of the Automotive AA6111 Alloy

  AUTHORS: Abdelhadi Abouarkoub, George Thompson, Xiaorong Zhou, Geoffrey Scamans

  KEYWORDS: Caustic Etching, Heat Treatment, AA6111, Q-Phase

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.4 No.6, November 21, 2016

  ABSTRACT: The caustic etching behaviour of the automotive AA6111 alloy with different aging conditions that simulate the various levels of heat input within the heat affected zone during the welding heating cycles has been investigated. The alloy dissolution rate was found to substantially increase with the pre-aging temperature, which enhances precipitation of the cathodic Q-phase and results in depletion of the alloy solid solution in magnesium and silicon. On the other hand, enhancing the kinetics of precipitation at high temperatures induces a more uniform distribution the Q-phase precipitates, which minimizes the potential difference between the interiors and boundaries of the adjacent grains. This was observed to reduce the severity of the surface topography developed by subsequent caustic etching surface pre-treatment.