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has been cited by the following article:

• TITLE: Correlation between Hardness, Structure and Electrochemical Performance of an AlZnMnMg Alloy

  AUTHORS: S. Valdez, B. Campillo, J. J. Islas

  KEYWORDS: AlZnMnMg Alloy; Hardness; Structure; Electrochemical Performance

  JOURNAL NAME: Engineering, Vol.4 No.9, September 28, 2012

  ABSTRACT: In this work the structural changes induced by aged treatment have shown a connection with differences of hardness and electrochemical performance. Al-base alloys have been investigated by means of Vickers hardness, X-ray diffraction, scanning electron and short-term electrochemical test. X-ray diffraction result reveals the formation of (MgZn)49Al32 phase for two conditions, the first one is when the magnesium content is upper to 5.49% in as-cast condition and the second one after the thermal treatment carried out at 450?C for 5 h. In addition, the hardness and electrochemical performance has been influenced by the presence and quantity of the (MgZn)49Al32 phase. The addition of magnesium alloying modifies the microstructure, increases the content of (MgZn)49Al32 phase and provides a localized corrosion which conduced to the breakdown of the oxide film (?-Al2O3) formed on the Al alloy surface.