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Low-temperature transformation to bainite in a medium-carbon steel

  • Mathew J. Peet , Hala S. Hasan , Marie-Noëlle Avettand-Fènoël , Saud H. A. Raubye and Harshad K. D. H. Bhadeshia
Published/Copyright: January 31, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 2

Abstract

The consequences of reducing the carbon concentration from 0.8 to 0.6 wt.% in a bulk nanostructured bainitic-steel have been investigated with the aim of enabling processing. We observed that the average thickness of the product phase plates increased from below 20–40 nm to about 100 nm after isothermal transformation at the same temperature. The increase in plate size led to decrease in hardness as expected. However the hardness reduction was not as large as might be expected, a transition to lower bainite at temperatures below 250°C may have provided additional strengthening. Transformation just below the martensite start temperature resulted in a mixture of martensite and bainite, with no observed increase in the rate of bainite transformation.

Keywords: Hardness; Nanostructure; Bainite; Steel
*Correspondence address, Dr. Mathew J. Peet, University of Cambridge, Materials Science and Metallurgy, 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom, Tel.: +441223334336, E-Mail:

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Received: 2016-09-26
Accepted: 2016-11-22
Published Online: 2017-01-31
Published in Print: 2017-02-10

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111461
Keywords for this article
Hardness; Nanostructure; Bainite; Steel

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. A new editor for IJMR
  5. Original Contributions
  6. Structural anisotropy in equal-channel angular extruded nickel revealed by dilatometric study of excess volume
  7. Low-temperature transformation to bainite in a medium-carbon steel
  8. Study on the welding continuous cooling transformation and weldability of SA508Gr4 steel for nuclear pressure vessels
  9. Phase precipitation in transition metal-containing 354-type alloys
  10. Effect of laser alloying on heat-treated light alloys
  11. In-situ synthesis, microstructure and properties of Ti2AlN/TiB2 composite
  12. Characterization of mechanical properties of Al/TiCP MMC
  13. Performance evaluation of polysulfone/graphene nanocomposites
  14. Short Communications
  15. Influence of Cu and Mg addition on age-related deterioration in strength and creep behavior of Zn-12Al die casting alloys
  16. Effects of mixing speed of a composite on its friction coefficient and wear resistance
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