Startseite Technik Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys
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Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys

  • Mohammad Mahdi Tavakoli , Saeed G. Shabestari und Mohsen Ghanbari
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

Al–Si–Cu casting alloys are widely used in manufacturing automotive parts. Semisolid forming of these alloys can eliminate major problems in their die casting. In this study, low superheated melt was employed to modify the microstructure and to produce non-dendritic A380 alloy. Melt was poured on a cooling slope plate at 615°C and ingots were obtained through permanent mold casting. They were thixoformed using a hydraulic press after holding at 570°C for 15 min to yield a microstructure having α-Al globules, Si particles, and modified β-phase intermetallic compounds. Image analysis showed that the size and distribution of α-Al phases and iron-bearing intermetallics were modified by using semisolid processing. The results also showed that cooling slope casting and thixoforming have improved the mechanical properties including tensile strength, elongation, and hardness of the high iron content A380 alloys.

Keywords: Intermetallic compounds; Cooling slope casting; Thixoforming; Semisolid process
* Correspondence address, Mr. Mohammad Mahdi Tavakoli, Center of Excellence for High Strength Alloys Technology (CEHSAT), School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Narmak, 16846, Tehran, Iran, Tel.: +982166163635, Fax: +982166163635, E-mail:

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Received: 2014-02-17
Accepted: 2014-07-29
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/10.3139/146.111140
Schlagwörter für diesen Artikel
Intermetallic compounds; Cooling slope casting; Thixoforming; Semisolid process

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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