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Microstructural Evolution of the 55 Wt Pct Al-Zn Coating During Press Hardening

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Abstract

Press hardening is increasingly being used to produce ultra-high strength steel parts for passenger cars. Al-Si, Zn, and Zn-alloy coatings have been used to provide corrosion protection to press hardening steel grades. The use of coatings has drawbacks such as coating delamination or liquid metal-induced embrittlement. In the present work, the microstructural evolution of Al-Zn coating during press hardening was studied. The 55 wt pct Al-Zn coating can in principle provide both Al barrier protection and Zn cathodic protection to press hardened steel. During the heat treatment associated with the press hardening, the 55 wt pct Al-Zn alloy coating is converted to an intermetallic surface layer of Fe2Al5 and a FeAl intermetallic diffusion layer. The Zn is separated from both intermetallic compounds and accumulates at grain boundaries and at the surface. This Zn separation process is beneficial in terms of providing cathodic protection to Al-Zn coated press hardening steel.

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References

  1. K. Steinhoff, N. Barbakadze, and M. Schupfer: Galvatech 2011 conference, Genova, Italy, 2011, pp. 319–26.

  2. K.-P. Imlau, K.-J. Peters, and B. Schuhmacher: Galvatech 2011 conference, Genova, Italy, 2011, pp. 13–22.

  3. J. Kondratiuk, P. Kuhn, E. Labrenz, C. Bischoff: Surf. Coat. Technol., 205 (2011) 4141–53.

    Article  Google Scholar 

  4. K. Mori, K. Akita, Y. Abe: Int. J. Mach. Tools Manuf., 47 (2) (2007) 321–25.

    Article  Google Scholar 

  5. H. Karbasian, A.E. Tekkaya, J. Mater. Process. Technol., 210 (2010) 2103–18.

    Article  Google Scholar 

  6. C.-E. Ridderstråle, Patent GB1490535, Sweden, 1977.

  7. H. Liu, X. **, H. Dong, J. Shi (2011) Mater. Charact., 62:223–27.

    Article  Google Scholar 

  8. D.W. Fan, H.S. Kim, J.K. Oh, K.G. Chin, B.C. De Cooman, ISIJ Int., 50 (2010) 561–68.

    Article  Google Scholar 

  9. F. Borsetto, A. Ghiotti, S. Bruchi, Key Eng. Mater., 410–411 (2009) 289–96.

    Article  Google Scholar 

  10. D.W. Fan and B.C. De Cooman: Steel Res. Int., 2012, vol. 83, pp. 412–33.

  11. D.W. Fan and B.C. De Cooman: ISIJ Int., 2010, vol. 50, pp. 1713–18.

  12. C. Alléy, L. Dosdat, O. Clauzeau, K. Ogle, P. Volovitch, Surf. Coat. Technol., 238 (2014) 188–96.

    Article  Google Scholar 

  13. C.W. Lee, D.W. Fan, S.J. Lee, I.R. Sohn, and B.C. De Cooman: Proc. of GALVATECH 2011 Conf., Genova, Italy, 2011, pp. 327–34.

  14. C.W. Lee, D.W. Fan, I.R. Sohn, S.J. Lee, B.C. De Cooman, Metall. Mater. Trans. A, 43 (2012) 5122–27.

    Article  Google Scholar 

  15. P. Drillet, R. Grigorieva, G. Leuillier, and T. Vietoris: 8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet, Genova, Italy, 2011, pp. 371–78.

  16. J. Federl: 1st International Conference on Hot Sheet Metal Forming of High-Performance Steel, Kassel, Germany, 2008, pp. 283–91.

  17. J.H. Selverian, M.R. Notis, A.R. Marder, J. Mater. Eng., 9 (1987) 133–40.

    Article  Google Scholar 

  18. A.R. Marder, Prog. Mater. Sci., 45 (2000) 191–271.

    Article  Google Scholar 

  19. J.L. Murray, Bull. Alloy Phase Diagr., 4 (1983) 55–73.

    Article  Google Scholar 

  20. Y.Y. Chang, C.C. Tsaur, J.C. Rock, Surf. Coat. Technol., 200 (2006) 6588–93.

    Article  Google Scholar 

  21. M.G. Nicholas and C.F. Old: J. Mater. Sci., 14 (1979) 1–18.

    Article  Google Scholar 

  22. R. Autengruber, G. Luckeneder, A. S. Kolnberger, J. Federl, A. W. Hassel, Steel Res. Int., 83 (2012) 1005–11.

    Article  Google Scholar 

Download references

Acknowledgments

The authors gratefully acknowledge the support of Dr. Yeol Rae CHO of the POSCO Technical Research Laboratories in Gwangyang, South Korea.

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Authors and Affiliations

  1. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang, South Korea

    Chang Wook Lee (Graduate Student) & Bruno Charles De Cooman (Professor, Director)

  2. Materials Design Laboratory, Pohang University of Science and Technology, Pohang, South Korea

    Bruno Charles De Cooman (Professor, Director)

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  1. Chang Wook Lee
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  2. Bruno Charles De Cooman
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Correspondence to Bruno Charles De Cooman.

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Manuscript submitted February 6, 2014.

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Lee, C.W., De Cooman, B.C. Microstructural Evolution of the 55 Wt Pct Al-Zn Coating During Press Hardening. Metall Mater Trans A 45, 4499–4509 (2014). https://doi.org/10.1007/s11661-014-2362-6

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