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Thixoformability evaluation of AA2011 and AA2014 alloys

  • Cecilia Tereza Weishaupt Proni , Marcos Akira d'Ávila and Eugênio José Zoqui
Published/Copyright: November 30, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 12

Abstract

This paper examines the feasibility of thixoforming two commercial aluminum–copper alloys: AA2011 and AA2014. This evaluation was performed in three steps: 1) characterization of the raw materials, including an analysis of their constituents, partial melting range temperatures, and microstructures; 2) characterization of the samples' morphological evolution during partial melting to observe their globularization at two different sets of temperatures, (solid fractions of 45 % and 60 %), and four holding times: 0, 30, 90 and 210 s; and 3) tests of the morphological behavior under the same partial melting conditions of temperature and holding times. The results indicate that, despite the difficulty of controlling the temperature of the semi-solid transition, these two alloys are suitable for thixoforming processes. Their morphology is stable in the semi-solid range and the corresponding viscosity values are lower than 106 Pa · s, resulting in a maximum conformational stress of 2.4 MPa.

Keywords: Thixoforming; Rheology; Microstructure; Semi-solid materials; AA2011 and AA2014 alloys
* Correspondence address, Eugênio José Zoqui, Manufacturing Engineering Department, Faculty of Mechanical Engineering, University of Campinas – UNICAMP, 13083 – 970, Campinas, SP., Brazil, Tel.: +55 19 35213296, Fax: +55 19 35213722, E-mail: , URL: www.fem.unicamp.br

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Received: 2013-3-22
Accepted: 2013-7-12
Published Online: 2013-11-30
Published in Print: 2013-12-12

© 2013, Carl Hanser Verlag, München

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  2. Contents
  3. Original Contributions
  4. Critical sizes for coherent to semicoherent transition in precipitates
  5. Thixoformability evaluation of AA2011 and AA2014 alloys
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  8. Optimization of the hot rolling parameters for evaluation of the formability of Nb-microalloyed steel sheet by using the Taguchi method
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https://doi.org/10.3139/146.110983
Keywords for this article
Thixoforming; Rheology; Microstructure; Semi-solid materials; AA2011 and AA2014 alloys

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Critical sizes for coherent to semicoherent transition in precipitates
  5. Thixoformability evaluation of AA2011 and AA2014 alloys
  6. Joint strength of friction stir welded AISI 304 austenitic stainless steels
  7. Optimization of process parameters in explosive cladding of titanium/stainless steel 304L plates
  8. Optimization of the hot rolling parameters for evaluation of the formability of Nb-microalloyed steel sheet by using the Taguchi method
  9. XPS measurements of LDX 2101 duplex steel surface after magnetoelectropolishing
  10. Phase equilibria of the Al-Cr-Pr ternary system at 773 K
  11. Processing and mechanical characterisation of monolithic silicon carbide ceramic consolidated by spark plasma sintering (SPS)
  12. Effect of Mn doping on the microstructure and dielectric properties of BaHf0.1Ti0.9O3 ceramics
  13. Nano hydroxyapatite–polysulfone coating on Ti-6Al-4V substrate by electrospinning
  14. Photocatalytic and self-cleaning properties of SiO2/TiO2/SiO2 nanostructured thin film
  15. Formation mechanism of manganese vanadate microtubes and their electrochemical sensing properties
  16. Modification of the luminescent properties of ZnS nanoparticles by the adsorbed species
  17. DGM News
  18. DGM News
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