Advertisement

HT-LSCM as a Tool for Indirect Determination of Precipitates by Real-Time Grain Growth Observations

  • Nora Fuchs
  • Christian BernhardEmail author
  • Susanne Michelic
  • Rian Dippenaar
Conference paper
  • 48 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The characterization of precipitation populations in steel with respect to their size distribution or volume fraction is still a challenge for even highly sophisticated analytical methods, and hence statistical data—absolutely essential for the verification of precipitation calculations—is still rare. The present paper aims at the use of high-temperature laser scanning confocal microscopy (HT-LSCM) in situ grain growth observations for the indirect conclusion on the precipitation or dissolution of AlN depending on initial aluminium and nitrogen content and thermal cycle. A formerly developed austenite grain growth model is applied to estimate the time-dependent Zener pinning and the results are finally used to adjust the relevant input parameters for the simulation of AlN precipitation kinetics in the commercial software MatCalc. The proposed paper will present first results and discuss the potential and limits of this efficient and time saving indirect method.

Keywords

HT-LSCM Grain growth Precipitation kinetics Aluminum nitride 

References

  1. 1.
    Wilson FG, Gladman T (1988) Aluminium nitride in steel. Int Mater Rev 33(1):221–286Google Scholar
  2. 2.
    Jeanmaire G, Dehmas M, Redjaïmia A, Puech S, Fribourg G (2014) Precipitation of aluminum nitride in a high strength maraging steel with low nitrogen content. Mater Charact 98:193–201Google Scholar
  3. 3.
    Mintz B (1999) The influence of composition on the hot ductility of steels and to the problem of transverse cracking. ISIJ Int 39(9):833–855CrossRefGoogle Scholar
  4. 4.
    Militzer M, Hawbolt EB, Ray Meadowcroft T, Giumelli A (1996) Austenite grain growth kinetics in Al-killed plain carbon steels. MMTA 27(11):3399–3409Google Scholar
  5. 5.
    Bepari MA (1989) Effects of second-phase particles on coarsening of austenite in 0.15 Pct carbon steels. MMTA 20(1):13–16Google Scholar
  6. 6.
    Hall EO (1951) The deformation and ageing of mild steel: III discussion of results. Proc Phys Soc, B 64(9):747–753CrossRefGoogle Scholar
  7. 7.
    Kang Y, Yu H, Fu J, Wang K, Wang Z (2003) Morphology and precipitation kinetics of AlN in hot strip of low carbon steel produced by compact strip production. Mater Sci Eng, A 351(1–2):265–271Google Scholar
  8. 8.
    Beeghly HF (1949) Determination of aluminum nitride nitrogen in steel. Anal Chem 21(12):1513–1519CrossRefGoogle Scholar
  9. 9.
    Garcı́a de Andrés C, Caballero FG, Capdevila C, San Martı́n D (2002) Revealing austenite grain boundaries by thermal etching: advantages and disadvantages. Mater Charact 49(2):121–127Google Scholar
  10. 10.
    Rabkin E, Klinger L (2001) The fascination of grain boundary grooves. Adv Eng Mater 3(5):277–282Google Scholar
  11. 11.
    Dippenaar RJ, Phelan DJ (2003) Delta-ferrite recovery structures in low-carbon steels. Metall Mater Trans, B 34(5):495–501Google Scholar
  12. 12.
    Fuchs N, Krajewski P, Bernhard C (2015) In-situ observation of austenite grain growth in plain carbon steels by means of high-temperature laser scanning confocal microscopy. Berg Huettenmaenn Monatsh 160(5):214–220Google Scholar
  13. 13.
    Yin H, Emi T, Shibata H (1998) Determination of free energy of .DELTA.-Ferrite/.GAMMA.-Austenite interphase boundary of low carbon steels by in-situ observation. ISIJ Int 38(8):794–801Google Scholar
  14. 14.
    Giumelli AK, Militzer M, Hawbolt EB (1999) Analysis of the austenite grain size distribution in plain carbon steels. ISIJ Int 39(3):271–280Google Scholar
  15. 15.
    Andersen I, Grong Ø (1995) Analytical modelling of grain growth in metals and alloys in the presence of growing and dissolving precipitates—I. Normal grain growth. Acta Metallurgica et Materialia 43(7):2673–2688Google Scholar
  16. 16.
    Bernhard C, Reiter J, Presslinger H (2008) A model for predicting the austenite grain size at the surface of continuously-cast slabs. Metall Mater Trans, B 39(6):885–895Google Scholar
  17. 17.
    Mullins WW (1958) The effect of thermal grooving on grain boundary motion. Acta Metall 6(6):414–427CrossRefGoogle Scholar
  18. 18.
    Radis R, Kozeschnik E (2010) Kinetics of AlN precipitation in microalloyed steel. MMTA 18(5):55003Google Scholar
  19. 19.
    Radis R, Kozeschnik E (2010) Concurrent precipitation of AlN and VN in microalloyed steel. Steel Res Int 81(8):681–685Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Nora Fuchs
    • 1
  • Christian Bernhard
    • 1
    Email author
  • Susanne Michelic
    • 1
  • Rian Dippenaar
    • 2
  1. 1.Chair of Ferrous MetallurgyMontanuniversitaet LeobenLeobenAustria
  2. 2.School of Mechanical, Materials, Mechatronic and Biomedical EngineeringUniversity of WollongongWollongongAustralia

Personalised recommendations