Skip to main content

Advertisement

SpringerLink
Log in

Influence of Isothermal Bainite Transformation Time on Microstructure and Mechanical Properties of Hot-Dip Galvanized TRIP Steel

  • Published:
Journal of Materials Engineering and Performance Aims and scope Submit manuscript

Abstract

The influence of isothermal bainitic transformation (IBT) time on microstructure and mechanical properties of hot-dip galvanized TRIP steel with 0.20C-1.50Mn-1.2Al-0.26Si was investigated using optical microscopy, x-ray diffraction (XRD), Transmission Electron Microscope (TEM), dilatometry, and mechanical testing. This steel has high tensile strength of over 780 MPa with elongation more than 22%. The microstructure of the steel mainly consisted of ferrite, bainite, retained austenite, and martensite. The metastable austenite remaining after bainitic transformation will be transformed into martensite at the final cooling stage. The IBT time affects retained austenite content. When the IBT increased from 10 to 60 s, the amount of retained austenite increased from 9.40 to 15.42%, correspondingly. The IBT time also affects the strain hardening behavior. The n value characteristics of samples for IBT time from 10 to 30 s are similar to those of DP steel; however, the n value of specimen with IBT of 60 s shows features typical of TRIP steel.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

  1. B.C. De Cooman, Structure-Properties Relationship in TRIP Steels Containing Carbide-Free Bainite, Curr. Opin. Solid State Mater. Sci., 2004, 8(3–4), p 285–303

    Article  Google Scholar 

  2. B. Mintz, Hot Dip Galvanising of Transformation Induced Plasticity and Other Intercritically Annealed Steels, Int. Mater. Rev., 2001, 46(4), p 169–197

    Article  CAS  Google Scholar 

  3. V.F. Zackay, E.R. Parker, D. Fahr, and R.A. Busch, The Enhancement of Ductility in High-Strength Steels, ASM Trans. Quart., 1967, 60(2), p 252–259

    CAS  Google Scholar 

  4. O. Matsumura, Y. Sakuma, and H. Takechi, Trip and Its Kinetic Aspects in Austempered 0.4C-1.5Si-0.8Mn Steel, Scripta Metall., 1987, 21(10), p 1301–1306

    Article  CAS  Google Scholar 

  5. P.J. Jacques, E. Girault, A. Mertens, B. Verlinden, J. van Humbeeck, and F. Delannay, The Developments of Cold-rolled TRIP-Assisted Multiphase Steels. Al-Alloyed TRIP-Assisted Multiphase Steels, ISIJ Int., 2001, 41(9), p 1068–1074

    Article  CAS  Google Scholar 

  6. H.T. Jiang, H.B. Wu, D. Tang, and Q. Liu, Influence of Isothermal Bainitic Processing on the Mechanical Properties and Microstructure Characterization of TRIP Steel, J. Univ. Sci. Technol. Beijing Miner. Metall., Mater., 2008, 15(5), p 574–579

    CAS  Google Scholar 

  7. E.M. Bellhousea and J.R. McDermid, Analysis of the Fe-Zn Interface of Galvanized High Al-Low Si TRIP Steels, Mater. Sci. Eng. A, 2008, 491(1–2), p 39–46

    Google Scholar 

  8. E.M. Bellhouse, A.I.M. Mertens, and J.R. McDermid, Development of the Surface Structure of TRIP Steels Prior to Hot-Dip Galvanizing, Mater. Sci. Eng. A, 2007, 463(1–2), p 147–156

    Google Scholar 

  9. L. Li, B.C. De Cooman, R.D. Liu, J. Vleugels, M. Zhang, and W. Shi, Design of TRIP Steel with High Welding and Galvanizing Performance in Light of Thermodynamics and Kinetics, J. Iron Steel Res. Int., 2007, 14(6), p 37–41

    Article  Google Scholar 

  10. A.K. De, J.G. Speer, and D.K. Matlock, Color Tint-Etching for Multiphase Steels, Adv. Mater. Process., 2003, 161(2), p 27–30

    CAS  Google Scholar 

  11. K. Sugimotom, M. Misu, M. Kobayashi, and H. Shirasawa, Effects of Second Phase Morphology on Retained Austenite Morphology and Tensile Properties in a TRIP-Aided Dual-Phase Steel Sheet, ISIJ Int., 1993, 33(7), p P775–P782

    Article  Google Scholar 

  12. S.J. Kim, C.G. Lee, T.H. Lee, and C.S. Oh, Effect of Cu, Cr and Ni on Mechanical Properties of 0.15 wt.% C TRIP-Aided Cold Rolled Steels, Scripta Mater., 2003, 48(5), p 539–544

    Article  CAS  Google Scholar 

  13. Y. Sakuma, D.K. Matlock, and G. Krauss, Intercritically Annealed and Isothermally Transformed 0.15 Pct C Steels Containing 1.2 Pct Si-1.5 Pct Mn and 4 Pct Ni: Part I. Transformation, Microstructure, and Room-Temperature Mechanical Properties, Metall. Mater. Trans. A, 1992, 23(A), p 1221–1232

    Google Scholar 

  14. M.H. Saleh and R. Priestner, Retained Austenite in Dual-Phase Silicon Steels and Its Effect on Mechanical Properties, J. Mater. Process. Technol., 2001, 113(1–3), p 587–593

    Article  CAS  Google Scholar 

Download references

Acknowledgment

This investigation was supported by the National Natural Science Foundation of China (No. 50804005).

Author information

Authors and Affiliations

  1. National Engineering Research Center for Advanced Rolling Technology, University of Science & Technology, Beijing, Beijing, 100083, China

    Wei Ding, Di Tang, Haitao Jiang & Wei Huang

Authors
  1. Wei Ding
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Di Tang
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Haitao Jiang
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Wei Huang
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Wei Ding.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ding, W., Tang, D., Jiang, H. et al. Influence of Isothermal Bainite Transformation Time on Microstructure and Mechanical Properties of Hot-Dip Galvanized TRIP Steel. J. of Materi Eng and Perform 20, 997–1002 (2011). https://doi.org/10.1007/s11665-010-9714-1

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11665-010-9714-1

Keywords

Search

Navigation