Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-27T16:35:39.213Z Has data issue: false hasContentIssue false
  • English
  • Français

Bainite transformation affected by predeformation and stress in G55SiMoV steel

Published online by Cambridge University Press:  01 December 2014

Lei Tian ,
Qing Ao  and
Shengli Li
Lei Tian
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
Qing Ao
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
Shengli Li*
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
*
a)Address all correspondence to this author. e-mail: lishengli@sdu.edu.cn
Get access

Abstract

The influence of predeformation and stress on the isothermal bainite transformation has been investigated in G55SiMoV steel via microstructure observation and kinetic analysis. It was found that the bainite transformation became faster and at the end of isothermal holding the bainite fraction increased under the applied stress condition. When the stress increased to 150 MPa, the bainite distribution became to be nonrandom in G55SiMoV steel. Different deformation conditions, in which both promotion and inhibition occurred in the same steel, were created. The promoting and inhibiting factors affected bainite transformation comprehensively. 20% deformation could promote the bainite transformation when it deformed at 900 °C, but prevent bainite transformation when it deformed at 750 °C. Increase of ferrite nucleation rate caused by distortion and dislocation, would suppress the growth of bainite carbides and make most carbides without full growth be finer and shorter.

Keywords

predeformationstresstransformation kineticsaligned microstructure
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 24 , 28 December 2014 , pp. 2994 - 3001
Copyright
Copyright © Materials Research Society 2014 

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

Bhadeshia, H.K.D.H.: Steel Technology International, Scholes, P.H. ed.; Sterling Publication: London, 1989; p. 289.Google Scholar
Wang, Q., Yang, Z.M., and Wu, C.J.: Analog of mechanism of deformation-induced ferrite transformation. J. Iron Steel Res. 21(2), 27 (2009).Google Scholar
Wang, B.X., Liu, X.H., and Wang, G.D.: Effect of deformation of austenite and cooling rates on transformation microstructures in a Mn–Cr gear steel. Mater. Des. 31(6), 3067 (2009).Google Scholar
Chang, L.C. and Bhadeshia, H.K.D.H.: Stress-affected transformation to lower bainite. J. Mater. Sci. 31(8), 2145 (1996).CrossRefGoogle Scholar
Kang, J.H., Suh, D.W., Cho, J.Y., Oh, K.H., and Lee, H.C.: Effect of external stress on the orientation distribution of ferrite. Scr. Mater. 48(1), 91 (2003).Google Scholar
Matsuzaki, A., Bhadeshia, H.K.D.H., and Harada, H.: Stress affected bainitic transformation in a Fe-C-Si-Mn alloy. Acta Metall. Mater. 42(4), 1081 (1994).Google Scholar
Shipway, P.H. and Bhadeshia, H.K.D.H.: The effect of small stresses on the kinetics of the bainite transformation. Mater. Sci. Eng., A 201(1), 143 (1995).Google Scholar
Bhadeshia, H.K.D.H.: Bainite in Steels (The Institute of Materials, London, 1992), p. 214.Google Scholar
Huang, C.Y., Yang, J.R., and Wang, S.C.: Effect of compressive deformation on the transformation behavior of an ultra-low-carbon bainitic steel. Mater. Trans. JIM 34, 658 (1993).CrossRefGoogle Scholar
Davenport, A.T., Miner, R.E., and Kot, R.A.: The Hot Deformation of Austenite, Balance, J.B. ed.; TMS-AIME, New York, 1977; p. 517.Google Scholar
Larn, R.H. and Yang, J.R.: The effect of compressive deformation of austenite on the bainitic ferrite transformation in Fe-Mn-Si-C steels. Mater. Sci. Eng., A 278(1), 278 (2000).CrossRefGoogle Scholar
Lambers, H.G., Tschumak, S., Maier, H.J., and Canadinc, D.: Role of austenitization and pre-deformation on the kinetics of the isothermal bainitic transformation. Metall. Mater. Trans. A 40(6), 1355 (2009).Google Scholar
Tian, L., Kong, G.H., Cui, X.Y., Feng, R., and Li, S.L.: The properties and structure stability of martensite-bainite dual phase structure in bearing steel. Appl. Mech. Mater. 330, 8 (2013).Google Scholar
Tian, L., Ao, Q., and Li, S.L.: Effect of austenitic state on microstructure and mechanical properties of martensite/bainite steel. J. Mater. Res. 29(07), 887 (2014).Google Scholar
Zuyao, X.: Effect of stress on bainitic transformation in steel. Acta Metall. Sin. 40(2), 113 (2004).Google Scholar
Bhadeshia, H.K.D.H. and Christian, J.W.: Bainite in steels. Metall Trans. A 21(3), 767 (1990).CrossRefGoogle Scholar
Yang, J.R., Huang, C.Y., Hsieh, W.H., and Chiou, C.S.: Mechanical stabilization of austenite against bainitic reaction in Fe-Mn-Si-C bainitic steel. Mater Trans. JIM 37(4), 579 (1996).Google Scholar
Fang, H.S., Feng, C., Deng, Y.K., Deng, X.H., Zhang, C., and Bai, B.Z.: Precipitation of the carbides in lower bainite. Acta Metall. Sin. 43(6), 583 (2007).Google Scholar
Patel, J.R. and Cohen, M.: Criterion for the action of applied stress in the martensitic transformation. Acta Metall. 1(5), 531 (1953).Google Scholar