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Austenite to polygonal-ferrite transformation and carbide precipitation in high strength low alloy steel

  • Xiaosheng Zhou , Ji Dong , Yongchang Liu , Chenxi Liu , Liming Yu , Yuan Huang and Huijun Li
Published/Copyright: January 12, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 1

Abstract

By differential scanning calorimetry measurement and microstructural examination, the effects of cooling rates on the kinetics and microstructure of polygonal ferrite transformation have been investigated in a high strength low alloy steel. The peak temperature of ferrite transformation exhibits an evident dependency on cooling rate. With the cooling rate decreasing, the ferrite fraction corresponding to the maximum transformation rate is decreased, as well as the size of polygonal ferrite grains. More ferrite is nucleated at lower cooling rate. On the basis of the effects of austenite grain size and carbide precipitation on ferrite formation, it is suggested that carbide precipitation plays a more dominant role in the kinetics of ferrite transformation. During austenite–ferrite transformation, the ferrite nucleation still proceeds, and the nucleation would not be saturated by pre-existing nuclei.

Keywords: Polygonal ferrite; Cooling rate; Carbide; High strength low alloy steel
*Correspondence address, Yongchang Liu, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, P R China, Tel.: +86-22-87401873, Fax: +86-22-87401873, E-mail:

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Received: 2016-08-23
Accepted: 2016-11-02
Published Online: 2017-01-12
Published in Print: 2017-01-09

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111454
Keywords for this article
Polygonal ferrite; Cooling rate; Carbide; High strength low alloy steel

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Digital material representation concept applied to investigation of local inhomogeneities during manufacturing of magnesium components for automotive applications
  5. Austenite to polygonal-ferrite transformation and carbide precipitation in high strength low alloy steel
  6. Precipitation behavior of carbides in high-carbon martensitic stainless steel
  7. Enthalpies of mixing in binary liquid alloys of lutetium with 3d metals
  8. Investigation of the 600 °C isothermal section of the Fe–Al–Ce ternary system
  9. The effect of high Al content on the microstructure and mechanical properties of Mg-xAl alloys processed by equal channel angular pressing
  10. Mechanical properties, bond strength and microstructural evolution of AA1060/TiO2 composites fabricated by warm accumulative roll bonding (WARB)
  11. Effect of graphite content on the tribological behavior of Al/2SiC/Gr hybrid nano-composites processed via mechanical milling
  12. Numerical predictions and experimental investigation of the temperature distribution of friction stir welded AA 5059 aluminium alloy joints
  13. DGM News
  14. DGM News
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