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Influence of heat treatment and aging on microstructure and mechanical properties of Mg-1.8Zn-0.7Si-0.4Ca alloy

Shaeri, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1002/mawe.201700224
  3. Publisher: Wiley-VCH Verlag , 2019
  4. Abstract:
  5. In order to optimize the aging treatment of Mg-1.8Zn-0.7Si-0.4Ca alloy, different times and temperatures of solid solution and age hardening were applied to the alloy specimens. Microstructures and mechanical properties of the specimens were investigated using the optical microscopy, field emission scanning electron microscopy equipped with an energy dispersive x-ray spectrometer, x-ray diffraction, hardness, and shear punch tests. The lowest hardness and strength were achieved by solution treating of the alloy at 500 °C for 8 h, presenting the optimal condition for solution treatment of the alloy. The microstructural examinations revealed three different precipitates consisting of CaMgSi, Ca 2 Mg 6 Zn 3 , and Mg 2 Si in the solid solution specimens. It was found that the highest peak hardness and strength are obtained by aging the alloy at 150 °C for 16 h. This condition was confirmed by differential scanning calorimetry (DSC) tests performed on the solid solution and aged specimens. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  6. Keywords:
  7. Aging ; Age hardening ; Aging of materials ; Calcium alloys ; Differential scanning calorimetry ; Field emission microscopes ; Hardness ; Heat treatment ; Mechanical properties ; Scanning electron microscopy ; Silicon alloys ; Solid solutions ; Spectrometers ; Ternary alloys ; X ray spectrometers ; Energy dispersive x-ray spectrometers ; Field emission scanning electron microscopy ; Microstructural examination ; Microstructure and mechanical properties ; Microstructures and mechanical properties ; Optimal conditions ; Solution treating ; Solution treatments ; Magnesium alloys
  8. Source: Materialwissenschaft und Werkstofftechnik ; Volume 50, Issue 2 , 2019 , Pages 187-196 ; 09335137 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/mawe.201700224