Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-19T06:01:53.107Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of Grain Size on Recrystallisation During hot Working of Austenitic Stainless Steels

Published online by Cambridge University Press:  15 February 2011

J. A. Whiteman ,
Y. Choi  and
C.M. Sellars
J. A. Whiteman
Affiliation:
IMMPETUS (Institute for Microstructural and Mechanical Process Engineering:The University of Sheffield), Mappin Street, Sheffield, SI 3JD, UK
Y. Choi
Affiliation:
now POSCO, PO Box 35, 790–600, Pohang City, Kyungbuk, Korea
C.M. Sellars
Affiliation:
IMMPETUS (Institute for Microstructural and Mechanical Process Engineering:The University of Sheffield), Mappin Street, Sheffield, SI 3JD, UK
Get access

Abstract

During the hot rolling of austenitic stainless steels, complete static recrystallisation is expected between passes unless finishing temperatures are low. Typically progressive refinement takes place to grain sizes in the range 20–50μm. However, most experimental studies of the effect of strain, strain rate, temperature and initial grain size on recrystallisation kinetics and recrystallised grain size under hot working conditions have been carried out on initial grain sizes greater than 50μm. Empirical relationships from these data and from more limited results of CMn steels have been extrapolated to smaller grain sizes for use in models of microstructural evolution during rolling.

Recent development of a physically based model for the effects of initial grain size, assuming that site saturated nucleation occurs at grain corners, grain edges, grain faces and at intragranular sites leads to interdependence of the effects of strain and grain sizeon nucleation density and hence on recrystallised grain size and recrystallisation rate. Experimental evidence available in the literature and some new results on finer grained Type 316 stainless steel are reviewed and compared with the expectations from the model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 445
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Sellars, C.M., Hot Working and Forming Processes, edited by Sellars, C.M. and Davies, G.J., Metals Society (London) 1980, pp. 3–15.Google Scholar
2. Choquet, P., Bon, A. Le and Perdrix, Ch., Strength of Metals and Alloys, edited by McQueen, H.J. et al. , Proc. ICSMA7, Montreal, Canada, 1985, 12, pp. 1025–1030.Google Scholar
3. Roberts, W., Sandberg, A., Siwecki, T. and Werlefors, T., HSLA Steels:Technology and Applications, Proc. Conf. Philadelphia, ASM 1983, pp.67–84.Google Scholar
4. Senuma, T. and Yada, H., Annealing Processes-Recovery, Recrystallisation and Grain Growth, edited by Hansen, N. et al. , Proc. 7th Riso International Symposium on Metallurgy and Materials Science, Riso, Roskilde, Denmark, 1986, pp. 547–552.Google Scholar
5. Sellars, C.M., Modelling- an Interdisciplinary Activity, edited by Yue, S., Proc. Int. Symp. Mathematical Modelling of Hot Rolling of Steel, The Canadian Institute of Mining and Metallurgy, Montreal, Canada, 1990, pp 1–18.Google Scholar
6. Sah, J.P., Richardson, G.J. and Sellars, C.M., Metal Science, 8, pp 325–331, (1974).Google Scholar
7. Choi, Y., M. Phil. thesis, University of Sheffield, 1999.Google Scholar
8. Barraclough, R. and Sellars, C.M., Metal Science, 13, pp 257–266, (1979).Google Scholar
9. Barbosa, R.A.N.M., and Sellars, C.M., Materials Science Forum, 113–115, pp 461–466, (1993).Google Scholar
10. Sellars, C.M., Modelling of Structural Evolution during Hot Working Processes, Riso Int. Symp. on Annealing Processes- Recovery, Recrystallisation and Grain Growth, Roskilde, Denmark, 1986, pp 167–187.Google Scholar
11. Towle, D.J. and Gladman, T., Metal Science, 13, pp 246–256, (1979).Google Scholar
12. Wadsworth, J.E.J. and Sellars, C.M., Effect of Grain size distributions on the Observed Microstructure during Static Recrystallisation of Type 316 Stainless Steel, edited by Chandra, T, Recrystallisation 90, The Minerals, Metals and Materials Society, Warrendale Pa, USA, 1990, pp 417–422.Google Scholar
13. Hodgson, P.D., Ph.D. thesis, University of Queensland,(1993).Google Scholar
14. Sandberg, A. and Sandstrom, R., Mat. Sci. and Tech., 2, pp 917–925, (1986).Google Scholar
15. Sellars, C.M., Microstructure Modelling in Hot Deformation, edited by Hutchinson, B et al. , Proc. Int. Conf. On Thermomechanical Processing: in Theory, Modelling and Practice [TMP]2 , The Swedish Soc. for Materials Technology, Stockholm, Sweden, 1997, pp 35–51.Google Scholar