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Design of carbide-free low-temperature ultra high strength bainitic steels

  • Carlos Garcia-Mateo und Francisca Garcia Caballero
Veröffentlicht/Copyright: 23. Mai 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 98 Heft 2

Abstract

There are severe limitations to attaining submicrostructured steels by means of continuous cooling, the achievement of fine grain sizes is limited by the need to dissipate enthalpy during rapid transformation, so that the actual grain size obtained is more than an order of magnitude greater than can be obtained theoretically. Bainitic microstructures obtained by isothermal heat treatment at low temperatures, can overcome the recalescence limitations and at the same time provide a very fine microstructure (nanostructure) that leads to extraordinary mechanical properties. Steel grades for this purpose have been designed by means of phase transformation theory alone and their mechanical properties tested. The results obtained reveal that the microstructure is indeed extremely fine and exhibits high levels of strength accompanied by reasonable ductility and toughness, mainly due to the fine scale of the bainitic ferrite plates achieved. The influence that retained austenite has on the mechanical properties through the TRIP effect is also discussed.

Keywords: Bainite; Phase transformation theory; Mechanical properties; TRIP
* Correspondence address, Dr. Carlos Garcia-Mateo, CENIM-CSIC. Avda/Gregorio del Amo 8. Madrid E-28040 Spain, Tel.: +34 91 553 8900 ext 364, Fax: +34 91 534 7425, E-mail:

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Received: 2006-5-25
Accepted: 2006-11-25
Published Online: 2013-05-23
Published in Print: 2007-02-01

© 2007, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. A comparison of different distributions of azimuth angles in the sin2 ψ-method
  5. Experimental study and thermodynamic assessment of the ZrO2–DyO1.5 system
  6. Liquid–solid phase equilibria in metal-rich Hf–Ti–Si alloys
  7. Density and atomic volume in liquid Al–Fe and Al–Ni binary alloys
  8. Identification of liquid/solid transformations in eutectic Pb–Sn alloy
  9. Cyclic deformation behaviour and lifetime calculation of the magnesium die-cast alloys AZ91D, MRI 153M and MRI 230D
  10. Applied
  11. Superplastic deformation behavior of a spray-deposited eutectic NiAl/Cr(Mo) alloy doped with Dy
  12. Fracture behavior of overmatched ductile iron weldment
  13. Design of carbide-free low-temperature ultra high strength bainitic steels
  14. The influence of orientation and aluminium content on the deformation mechanisms of Hadfield steel single crystals
  15. Effect of tempering on the microstructure and hardness of ledeburitic chromium steel X155CrVMo12.1
  16. Notifications
  17. DGM News
https://doi.org/10.3139/146.101440
Schlagwörter für diesen Artikel
Bainite; Phase transformation theory; Mechanical properties; TRIP

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. A comparison of different distributions of azimuth angles in the sin2 ψ-method
  5. Experimental study and thermodynamic assessment of the ZrO2–DyO1.5 system
  6. Liquid–solid phase equilibria in metal-rich Hf–Ti–Si alloys
  7. Density and atomic volume in liquid Al–Fe and Al–Ni binary alloys
  8. Identification of liquid/solid transformations in eutectic Pb–Sn alloy
  9. Cyclic deformation behaviour and lifetime calculation of the magnesium die-cast alloys AZ91D, MRI 153M and MRI 230D
  10. Applied
  11. Superplastic deformation behavior of a spray-deposited eutectic NiAl/Cr(Mo) alloy doped with Dy
  12. Fracture behavior of overmatched ductile iron weldment
  13. Design of carbide-free low-temperature ultra high strength bainitic steels
  14. The influence of orientation and aluminium content on the deformation mechanisms of Hadfield steel single crystals
  15. Effect of tempering on the microstructure and hardness of ledeburitic chromium steel X155CrVMo12.1
  16. Notifications
  17. DGM News
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