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Isochronal annealing of a deformed Fe-7.5 mass.% Si-steel

  • Fernando González Cámara , K. haled M. Mostafa , Roumen Petrov , Pablo Rodríguez-Calvillo , Eddy De Grave , Danny Segers and Y. van Houbaert
Published/Copyright: May 31, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 12

Abstract

FeSi samples with 7.5 mass.% Si were cold deformed with a thickness reduction of 16% and isochronally annealed for one hour at different temperatures. Their microstructure was characterised using positron annihilation lifetime spectroscopy and electron backscatter diffraction.

Positron annihilation mean lifetime values (τmean) decreased slightly with the increase in annealing temperature (20 to 600°C), a process related to recovery. In addition, τmean decreased significantly in the 700–900°C temperature range. The measured value of τmean is 106 ps, which is similar to the pure undeformed Fe after annealing at 900°C. Thus, the material is virtually free of defects at 900°C. Microscopy and diffraction studies showed a high amount of shear bands for the deformed sample. In the temperature range of 20–600°C, no recrystallisation was observed. According to the electron backscatter diffraction data, the recrystallisation starts after 700°C, and it is completed at 900°C.

Keywords: High silicon steel; Positron annihilation; Electron backscatter diffraction; Recovery
* Correspondence address, Lic. Fernando González Cámara, Ghent University, Technologiepark 903, B-9052 Zwijnaarde (Gent) – Belgium. Tel.: 0032 (0) 93310443, Fax: 0032 (0) 92645833, E-mail:

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Received: 2011-11-28
Accepted: 2012-4-26
Published Online: 2013-05-31
Published in Print: 2012-12-01

© 2012, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110793
Keywords for this article
High silicon steel; Positron annihilation; Electron backscatter diffraction; Recovery

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Effect of texture on grain growth in an interstitial-free steel sheet
  5. Nanoindentation of pseudoelastic NiTi containing Ni4Ti3 precipitates
  6. Isochronal annealing of a deformed Fe-7.5 mass.% Si-steel
  7. Modelling of three powder compaction laws for cold die pressing
  8. Surface tension and density of liquid Sn–Ag–Cu alloys
  9. Thermodynamics of liquid Au–Sb–Sn
  10. Phase relations in the ZrO2-Sm2O3-Y2O3-Al2O3 system: experimental investigation and thermodynamic modelling
  11. Contributions of phase composition and defect structure to the long term stability of Li/MgO catalysts
  12. First and second differentials of the ultrasonic parameter as an effective tool to identify phase transitions in R1-xAxMnO3 perovskites
  13. Surface oxide layer formation on Au-Pt-Pd-Si alloys for dental resin restorations
  14. On the high temperature stability of γ-Al2O3/Ti0.33Al0.67N coated WC–Co cutting inserts
  15. Optimizing composition for (Nd, Pr)–Nb–Fe–B hard magnetic nanocomposites
  16. Simple ionic-liquid assisted method for preparation of Cd1-xZnxS nanoparticles with improved photocatalytic activity
  17. A low-cost route for synthesizing tungsten disulfide film composites from abundant sprayed oxides: Technique and characterization
  18. Anodic behavior of Al–Zn–In sacrificial anodes at different concentration of zinc and indium
  19. Short Communications
  20. Effect of molybdenum addition on fracture toughness and hardness of Fe2B in Fe–B–C cast alloy
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  22. DGM News
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