Startseite Technik Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys
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Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys

  • Panagiota I. Sarafoglou und Gregory N. Haidemenopoulos
Veröffentlicht/Copyright: 5. Dezember 2014
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 105 Heft 12

Abstract

The mapping of Mg2Si and β-AlFeSi phase fractions in the as-cast microstructure of Al–Mg–Si–Fe–Mn (6xxx series) alloys has been performed over the useful composition range (0–1.2 mass%) of the principal alloying elements Mg and Si. The calculations were based on the Scheil–Gulliver assumption of infinite diffusion in the liquid and limited diffusion in the solid state. The computed phase fractions were validated with experimental measurements of phase fractions. The mapping procedure allows the control of intermetallic phases in the as-cast microstructure, the minimization of the β-AlFeSi phase in particular, which is a significant prerequisite in obtaining enhanced extrudability, combined with high strength in this alloy series. Construction of maps for different levels of Mn has shown that addition of Mn could allow for higher alloying with Mg and Si, in order to obtain higher amounts of Mg2Si, without at the same time increasing the β-AlFeSi phase in the as-cast microstructure.

Keywords: Aluminum alloys; Computational thermodynamics; Microsegregation; Alloy design
* Correspondence address, Professor Gregory N. Haidemenopoulos, Department of Mechanical Engineering, University of Thessaly, Volos 38334, Greece, Tel.: +302421074062, Fax: +302421074061, E-mail:

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Received: 2014-05-15
Accepted: 2014-07-25
Published Online: 2014-12-05
Published in Print: 2014-12-08

© 2014, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the orientation dependence of grain boundary triple line energy in Cu
  5. Hydrogen storage kinetics of as-cast and spun (Mg24Ni10Cu2)100–xNdx (x = 0–20) alloys
  6. Segregation of phosphorus to ferrite grain boundaries during transformation in an Fe–P alloy
  7. A study on the pseudoelasticity of low temperature aged and thermomechanically treated Ti-51.5 at.% Ni shape memory alloy
  8. Experimental determination and thermodynamic calculation of the phase equilibria in the Co–Mn–Ta system
  9. 800°C isothermal section of the Co–Cr–Mo–Si quaternary system
  10. Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys
  11. Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys
  12. The superplasticity of friction stir processed Al-5Mg alloy with additions of scandium and zirconium
  13. Short Communications
  14. Anti-corrosion behaviour of VE/GF coatings on mild steel
  15. Intermetallic phase stabilized Al/Pb metallic emulsion
  16. Synthesis of ultrafine powder (W,Ti)C by microwave heating in a stream of argon
  17. Fabrication and properties of porous silicon nitride ceramics via microwave sintering
  18. DGM News
  19. Personal
https://doi.org/10.3139/146.111139
Schlagwörter für diesen Artikel
Aluminum alloys; Computational thermodynamics; Microsegregation; Alloy design

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the orientation dependence of grain boundary triple line energy in Cu
  5. Hydrogen storage kinetics of as-cast and spun (Mg24Ni10Cu2)100–xNdx (x = 0–20) alloys
  6. Segregation of phosphorus to ferrite grain boundaries during transformation in an Fe–P alloy
  7. A study on the pseudoelasticity of low temperature aged and thermomechanically treated Ti-51.5 at.% Ni shape memory alloy
  8. Experimental determination and thermodynamic calculation of the phase equilibria in the Co–Mn–Ta system
  9. 800°C isothermal section of the Co–Cr–Mo–Si quaternary system
  10. Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys
  11. Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys
  12. The superplasticity of friction stir processed Al-5Mg alloy with additions of scandium and zirconium
  13. Short Communications
  14. Anti-corrosion behaviour of VE/GF coatings on mild steel
  15. Intermetallic phase stabilized Al/Pb metallic emulsion
  16. Synthesis of ultrafine powder (W,Ti)C by microwave heating in a stream of argon
  17. Fabrication and properties of porous silicon nitride ceramics via microwave sintering
  18. DGM News
  19. Personal
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