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Neutron diffraction study of the low-temperature ageing of martensite in dual-phase steel

  • Tom Waterschoot , Bruno C. De Cooman EMAIL logo , Sven Vandeputte and Kelly Conlon
Published/Copyright: February 3, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 4

Abstract

Neutron diffraction measurements were used to obtain a better understanding of the ageing behaviour in dual-phase ferrite + martensite steels. Therefore, the influence of different ageing treatments on the tempering of low-alloyed 0.4 and 0.7% C FeMnCrMo-martensite and 0.1% C FeMnCrMo dual-phase steels was investigated. On tempering at 170 and 350 °C, the sequential precipitation of g- and h-carbides, as well as the loss of tetragonality was observed in the martensite. The decrease in austenite lattice parameter after tempering is due to stress relaxation in the material. These observations offer an acceptable explanation for the large yield stress increase after ageing at 170 °C.

Keywords: Dual-phase steel; Ferrite ageing; Martensite tempering; Yielding behaviour; C clusters; Precipitation; Internal stresses
Prof. Dr. ir. BC De Cooman Dept. of Metallurgy and Materials Science, Technologiepark 903 B-9052 Ghent, Belgium Tel.: +32 92 64 57 84 Fax: +32 92 64 58 33

  1. The authors would like to thank the National Research Council of Canada for the access to the neutron diffraction facility at Chalk River National Laboratories, and Mr. E. De Temmerman for the metallography.

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Received: 2002-12-02
Published Online: 2022-02-03

© 2003 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Aberration-corrected scanning transmission electron microscopy: the potential for nano- and interface science
  4. Analysis of mismatched heterointerfaces by combined HREM image processing and modelling
  5. A numerical model of grain growth
  6. Producing super-hydrophobic surfaces with nano-silica spheres
  7. A thermodynamic assessment of the In–Se system
  8. Thermodynamic assessment of the miscibility gaps and the metastable liquidi in the Zn‐Bi, Zn‐Pb, and Zn‐Tl systems
  9. A re-examination of the liquidus surface of the Al–Fe–Ti system
  10. The Fe–Cr–Zn system in relation with the galvanizing process in chromium-added zinc bath
  11. Diffusion in polymer-derived Si–(B–)C–N ceramics, particularly amorphous Si29B9C41N21
  12. Neutron diffraction study of the low-temperature ageing of martensite in dual-phase steel
  13. Amplitude-dependent internal friction of dislocation interactions in dual-phase steel
  14. Discontinuous precipitation of a liquid in Cu-base alloys – nucleation and growth mechanisms
  15. Resistometric and calorimetric analysis of phase transformations in AuCu alloys
  16. Investigation of interfacial reactions between Sn–Ag–Bi–In solder and (Cu, electroless Ni–P/Cu) substrate
  17. Wear behaviour of C/C–SiC composites sliding against high-Cr steel discs
  18. Notifications/Mitteilungen
  19. Enteignung von Autoren und Verlagen?
  20. Personal/Personelles
  21. Information
  22. Conferences/Konferenzen
https://doi.org/10.1515/ijmr-2003-0074
Keywords for this article
Dual-phase steel; Ferrite ageing; Martensite tempering; Yielding behaviour; C clusters; Precipitation; Internal stresses

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Aberration-corrected scanning transmission electron microscopy: the potential for nano- and interface science
  4. Analysis of mismatched heterointerfaces by combined HREM image processing and modelling
  5. A numerical model of grain growth
  6. Producing super-hydrophobic surfaces with nano-silica spheres
  7. A thermodynamic assessment of the In–Se system
  8. Thermodynamic assessment of the miscibility gaps and the metastable liquidi in the Zn‐Bi, Zn‐Pb, and Zn‐Tl systems
  9. A re-examination of the liquidus surface of the Al–Fe–Ti system
  10. The Fe–Cr–Zn system in relation with the galvanizing process in chromium-added zinc bath
  11. Diffusion in polymer-derived Si–(B–)C–N ceramics, particularly amorphous Si29B9C41N21
  12. Neutron diffraction study of the low-temperature ageing of martensite in dual-phase steel
  13. Amplitude-dependent internal friction of dislocation interactions in dual-phase steel
  14. Discontinuous precipitation of a liquid in Cu-base alloys – nucleation and growth mechanisms
  15. Resistometric and calorimetric analysis of phase transformations in AuCu alloys
  16. Investigation of interfacial reactions between Sn–Ag–Bi–In solder and (Cu, electroless Ni–P/Cu) substrate
  17. Wear behaviour of C/C–SiC composites sliding against high-Cr steel discs
  18. Notifications/Mitteilungen
  19. Enteignung von Autoren und Verlagen?
  20. Personal/Personelles
  21. Information
  22. Conferences/Konferenzen
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