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Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites

  • Ilija Bobić , Miroslav Babić , Aleksandar Vencl , Biljana Bobić and Slobodan Mitrović
Published/Copyright: October 18, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 10

Abstract

Thixocast ZA27 alloy and particulate ZA27/SiCp composites were subjected to artificial aging at 80, 120 and 160°C (T5 regime). Composites with 5 and 10 vol.% SiC particles were produced via the compocasting method. The influence of the aging was investigated using different techniques. Differential scanning calorimetry was performed to reveal the presence of phases created in the thixocast ZA27 alloy and the composites. Microstructures and fracture behavior were examined by means of optical microscopy, scanning electron microscopy and X-ray diffraction. Aging processes in the matrix alloy and composites were followed using hardness measurements. A decrease in the hardness values was noticed with the increase in the aging temperature. At higher temperatures diffusion of zinc atoms from supersaturated phases in the matrix alloy was enhanced, which resulted in faster changes in the hardness. Aging processes in the composites were significantly accelerated compared to the matrix alloy, due to the presence of particulate reinforcements. The maximum in hardness was achieved for shorter time in the ZA27/SiCp composite with higher volume fraction of SiC particles.

Keywords:: ZA27 alloy; Metal matrix composites; Compocasting; Artificial aging; Hardness
* Correspondence address, Ilija Bobic, PhD, “Vinča” Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12 – 14, 11001, Belgrade, Serbia, Tel.: +381 11 34 08 518, Fax: +381 11 34 08 224, E-mail:

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Received: 2012-12-19
Accepted: 2013-5-16
Published Online: 2013-10-18
Published in Print: 2013-10-10

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110958
Keywords for this article
ZA27 alloy; Metal matrix composites; Compocasting; Artificial aging; Hardness

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Martensite–austenite transformation kinetics of high Cr ferritic heat-resistant steel
  5. Ageing texture of hot rolled and solution treated Ti–Nb alloys
  6. Artificial aging of thixocast ZA27 alloy and particulate ZA27/SiCp composites
  7. Low cycle fatigue behavior under asymmetric loading of two AZ31B magnesium alloys with different microstructures and textures
  8. Mechanical properties of aluminum extruded via the KOBO method with direct and lateral outflow
  9. Hot compression deformation of an Mg–2.54Nd–0.26Zn–0.32Zr alloy
  10. Evaluation of the sliding performance of polyamide, poly-oxy-methylene and their composites
  11. Corrosion behaviour of AISI 204Cu and AISI 304 stainless steels in simulated pore solution
  12. Comparing the corrosion behavior of nanograined and coarse-grained interstitial free steels
  13. Electrochemical investigation of the effect of different laser surface treatments on Hastelloy G alloy
  14. Influence of sputtering gas pressure on properties of transparent conducting Si-doped zinc oxide films
  15. Cu2SnS3 absorber thin films prepared via successive ionic layer adsorption and reaction method
  16. Nano preparation of Dy3+ substituted ceria via urea-formaldehyde gel combustion route
  17. Short Communications
  18. Preparation of ZrB2-based nanocomposites with limited grain growth by means of low-temperature hot-pressing using Cu additive
  19. Combustion synthesis of Ti2SC
  20. People
  21. Prof. Dr. Tomaž Kosmač
  22. DGM News
  23. DGM News
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