Effect of heat treatments on oxidation kinetics in AZ91 and AM60 magnesium alloys

• Published in: Materials characterization Vol. 62; no. 10; pp. 982 - 986
• Main Authors: Barrena, M.I., Gómez de Salazar, J.M., Matesanz, L., Soria, A.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01-10-2011; Elsevier
• Subjects: Alloys; ALUMINIUM ALLOYS; Composition effects; Cross-disciplinary physics: materials science; rheology; CRYSTAL GROWTH; Diffraction; Exact sciences and technology; Heat treatment; HEAT TREATMENTS; HEATING; Magnesium alloy; MAGNESIUM BASE ALLOYS; MATERIALS SCIENCE; MICROSTRUCTURE; MORPHOLOGY; OXIDATION; Oxidation kinetics; OXIDES; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; SCANNING ELECTRON MICROSCOPY; Solidification; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; X-rays; Oxidation kinetics; Heat treatment; Microstructure; Magnesium alloy; Magnesium base alloys; Oxidation; Kinetics; Heat treatments
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2011.07.001

The effect of heat treatments on a non protective atmosphere (air) on the morphology and composition of the oxide in AM60 and AZ91 alloys has been evaluated. With the aim of evaluating the loss of alloying elements during heat treatment, a study of these alloys has been carried out using thermogravimetric analysis (TGA). In order to determine the nature of the oxides the reaction products generated were evaluated by scanning electron microscopy and X-ray diffraction. Results show that the nature and morphology of the oxides generated are related to the temperature and the time of the heating conditions applied.
► The effect of heat treatments on the oxide growth in Mg-Al alloys has been evaluated. ► The nature and morphology of the oxides have been characterized. ► These oxides are associated to the time and the temperature conditions.