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Phase transformations in non-isothermally annealed as-cast and cold-rolled AlMnScZr alloys

  • Martin Vlach , Ivana Stulíková , Bohumil Smola , Hana Císarová , Jaroslava Piešová , Stanislav Daniš , Ryota Gemma , Jaroslav Málek , Dhritti Tanprayoon and Volkmar Neubert
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 7

Abstract

The effect of Mn addition on the microstructure, thermal and mechanical properties in as-cast and cold-rolled Al–Sc–Zr alloys was studied. Electrical resistometry, differential scanning calorimetry and microhardness measurements were used. Transmission electron microscopy, electron backscatter diffraction and X-ray diffraction of specimens quenched from temperatures of pronounced changes in resistivity helped to identify the microstructural processes responsible for resistivity changes. The distinct microhardness increase observed after annealing above ∼320°C is caused by precipitation of the Al3Sc particles. The cold-rolling prior to a heat treatment has no substantial effect on temperature position of the Al3Sc-phase precipitation. The formation of Al6Mn and/or Al6(Mn,Fe) particles is responsible for the intensive resistivity decrease of the cold-rolled materials compared to the as-cast materials. Precipitation of these particles has an insignificant effect on microhardness. The apparent activation energy for the precipitation of the Al3Sc particles was determined.

Keywords: Al–Mn–Sc–Zr alloy; Cold rolling; Activation energy; Al3Sc phase; Isochronal annealing
* Correspondence address Dr. Martin Vlach Charles University in PragueFaculty of Mathematics and Physics Ke Karlovu 3, Prague, Czech Republic Tel.: +420221911458 Fax: +420221911618 E-mail:

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Received: 2011-6-7
Accepted: 2012-1-4
Published Online: 2013-06-11
Published in Print: 2012-07-01

© 2012, Carl Hanser Verlag, München

Articles in the same Issue

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  2. Contents
  3. Original Contributions
  4. Diffusivities and atomic mobilities in Cu-rich fcc Al–Cu–Mn alloys
  5. Phase transformations in non-isothermally annealed as-cast and cold-rolled AlMnScZr alloys
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https://doi.org/10.3139/146.110712
Keywords for this article
Al–Mn–Sc–Zr alloy; Cold rolling; Activation energy; Al3Sc phase; Isochronal annealing

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusivities and atomic mobilities in Cu-rich fcc Al–Cu–Mn alloys
  5. Phase transformations in non-isothermally annealed as-cast and cold-rolled AlMnScZr alloys
  6. High-temperature deformation behavior and thermal properties of an Ni30Co17Fe53 alloy
  7. Microstructural and mechanical properties of dual-phase steels welded using GMAW with solid and flux-cored welding wires
  8. Microstructure – wear performance relationship of hypoeutectic 15% Cr-2% Mo white iron
  9. The enhancement of wear properties of squeeze-cast A356 composites reinforced with B4C particulates
  10. Phase diagram of the Al–Dy–Zr ternary system at 773 K
  11. Calorimetric investigations of liquid gold–antimony–tin alloys
  12. Combustion synthesis and characterization of bulk nanostructured Ni50Al17Fe33 alloy
  13. Effect of sand blasting on structural, thermal, and mechanical properties of Zr58.3Cu18.8Al14.6Ni8.3 bulk metallic glass
  14. Studies of dynamic mass transfer at the slag–metal interface – Interfacial velocity measurements
  15. Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method
  16. Adsorption of bovine serum albumin onto titanium dioxide nanotube arrays
  17. CNT-based displacement sensor
  18. Non-covalent assembly of hybrid nanostructures of gold and palladium nanoparticles with carbon nanotubes
  19. Effect of solid content on performance of conductive silver paste for crystalline silicon solar cells
  20. Effect of inhomogeneous size and shape of graphite particles on the in-plane electrical conductivity of PP/G/CB composites
  21. The durability of fired brick incorporating textile factory waste ash and basaltic pumice
  22. DGM News
  23. DGM News
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