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Effects of Shape and Orientation of MnS on Charpy Impact and Bending Properties in Hot-Press-Forming (HPF) Steels

  • Min Cheol Jo
  • Selim Kim
  • Seongwoo Kim
  • Jinkeun Oh
  • In Sik Suh
  • Sunghak LeeEmail author
Article
  • 19 Downloads

Abstract

The hot-press-forming (HPF) steels might contain a few MnS inclusions, and their brittle characteristics and stringer shape can deteriorate the impact toughness and formability. In this study, effects of shape and orientation of MnS particles on Charpy impact and bending properties of 1470-MPa-grade HPF steel sheets were investigated by conducting ex situ three-point bending or tension tests. According to direct observations of sequential cracking processes of MnS particles in the longitudinal-oriented specimen, largely elongated (high-aspect-ratio-valued) MnS particles were prone to form cracks at low strains. In the transverse-oriented specimen, MnS/matrix interfaces were debonded at the lower strains, and were liable to develop into cracks along the longitudinal direction. These observed results in this study indicated that the MnS cracking and MnS/matrix interfacial debonding were major fracture-initiation sites in the longitudinal- and transverse-oriented specimens, respectively, thereby leading to the decreases in both Charpy impact and bending properties in the MnS-containing HPF steel sheet.

Notes

Acknowledgments

This work was supported by POSCO (Grant Number: 2017Y046) and by Brain Korea 21 PLUS Project for Center for Creative Industrial Materials.

References

  1. 1.
    D. W. Fan, R. B. Park, Y. R. Cho, and B. C. De Cooman: Steel Res. Int., 2010, vol. 81, pp. 292-98.CrossRefGoogle Scholar
  2. 2.
    H. Karbasian and A. E. Tekkaya: J. Mater. Process Tech., 2010, vol. 210, pp. 2103-18.CrossRefGoogle Scholar
  3. 3.
    D.W. Fan, Han S. Kim, S. Birosca, and B.C. De Cooman: Mater. Sci. Technol. Conf. MS&T, Detroit, Michigan, 2007, pp. 99–110.Google Scholar
  4. 4.
    I. Hwang, H. Yun, D. Kim, M. Kang, Y.-M. Kim: Met. Mater. Int., 2018, vol. 24, pp. 149-156.CrossRefGoogle Scholar
  5. 5.
    J. Lechler, M. Merklein, and M. Geiger: Steel Res. Int., 2008, vol. 79, pp. 98-104.CrossRefGoogle Scholar
  6. 6.
    E.-J. Chun, S.-S. Lim, Y.-T. Kim, K.-S. Nam, Y.-M. Kim, Y.-W. Park, S.P. Murugan, Y.-D. Park: Met. Mater. Int., 2018, 25: 179-192.CrossRefGoogle Scholar
  7. 7.
    Y. Chang, X. D. Li, K. M. Zhao, C. Y. Wang, G. J. Zheng, P. Hu, and H. Dong: Mater. Sci. Eng. A, 2015, vol. 629, pp. 1-7.CrossRefGoogle Scholar
  8. 8.
    T. Taylor and A. Clough: Mater. Sci. Tech., 2018, vol. 34, pp. 809-61.CrossRefGoogle Scholar
  9. 9.
    A. Bardelcik, Ch. P. Salisbury, S. Winkler, M. A. Wells, and M. J. Worswick: Int. J. Impact Eng., 2010, vol. 37, pp. 694-702.CrossRefGoogle Scholar
  10. 10.
    M. Merklein and J. Lechler: J. Mater. Process Tech., 2006, vol. 177, pp. pp. 452-55.CrossRefGoogle Scholar
  11. 11.
    P. Hein: Adv. Mater. Res., 2005, vol. 6-7, pp. 763-70.CrossRefGoogle Scholar
  12. 12.
    B. Jian, L. Wang, H. Mohrbacher, H. Z. Lu, and W. J. Wang: Adv. Mater. Res., 2015, vol. 1063, pp. 7-20.CrossRefGoogle Scholar
  13. 13.
    J. Wang, C. Enloe, J. Singh, and C. Horvath: SAE Int. J. Mater. Manf., 2016, vol. 9, pp. 488-93.Google Scholar
  14. 14.
    J. Bian, H. Z. Lu, W. J. Wang, and A. M. Guo: Proc. 3rd Int. Conf. Adv. High Strength Steel Press Hardening (ICHSU2016), Xi’an, China, 2017, pp. 3–10.Google Scholar
  15. 15.
    J. Bian and H. Mohrbacher: Proc. Int. Symp. New Dev. Adv. High-Strength Sheet Steels, 2013, pp. 23–27.Google Scholar
  16. 16.
    H. L. Yi, S. Ghosh, and H. K. D. H. Bhadeshia: Mater. Sci. Eng. A, 2010, vol. 527, pp. 4870-74.CrossRefGoogle Scholar
  17. 17.
    H. Liu, X. Lu, X. Jin, H. Dong, and J. Shi: Scr. Mater., 2011, vol. 64, pp. 749-52.CrossRefGoogle Scholar
  18. 18.
    X. Han, Y. Zhong, K. Yang, Z. Cui, and J. Chen: Proc. Eng., 2014, vol. 81, pp. 1737-43.CrossRefGoogle Scholar
  19. 19.
    L. Wolf, F. Nürnberger, D. Rodman, and H. J. Maier: Steel Res. Ins., 2017, vol. 88, pp. 1-14.Google Scholar
  20. 20.
    L. Ying, Y. Chang, P. Hu, G. Z. Shen, L. Z. Liu, and X. D. Li: Adv. Mater. Res., 2011, vol. 146, pp. 160-65.CrossRefGoogle Scholar
  21. 21.
    M. Naderi and M. Abbasi: Metall. Mater. Trans. A, 2013, vol. 44, pp. 1852-61.CrossRefGoogle Scholar
  22. 22.
    J. Bian, H.Z. Lu, and W.J. Wang: Proc. 2nd Int. Conf. Adv. High Strength Steel Press Hardening (ICHSU2015), Changsha, China, 2015, pp. 20–26.Google Scholar
  23. 23.
    T. Taylor, G. Fourlaris, and A. Clough: Mater. Sci. Tech., 2017, vol. 33, pp. 1964-77.CrossRefGoogle Scholar
  24. 24.
    A. Ghosh, S. Sahoo, M. Ghosh, R. N. Ghosh, and D. Chakrabarti: Mater. Sci. Eng. A, 2014, vol. 613, pp. 37-47.CrossRefGoogle Scholar
  25. 25.
    A. Ghosh, P. Modak, R. Dutta, and D. Chakrabarti: Mater. Sci. Eng. A, 2016, vol. 654, pp. 298-308.CrossRefGoogle Scholar
  26. 26.
    J. Lu, G. Cheng, J. Che, L. Wang, and G. Xiong: Met. Mater. Int., 2018, vol. 24, pp. 1-14.CrossRefGoogle Scholar
  27. 27.
    D. K. Biswas, M. Venkatraman, C. S. Narendranath, and U. K. Chatterjee: Metall. Trans. A, 1992, vol. 23, pp. 1479-92.CrossRefGoogle Scholar
  28. 28.
    B. Jiang, M. Wu, H. Sun, Z. Wang, Z. Zhao, and Y. Liu: Met. Mater. Int., 2018, vol. 24, pp. 15-22.CrossRefGoogle Scholar
  29. 29.
    F. N. H Schrama, E. M. Beunder, B. Van den Berg, Y. Yang, and R. Boom: Ironmak. Steelmak., 2017, vol. 44, pp. 333-43.CrossRefGoogle Scholar
  30. 30.
    T. Emi: ISIJ Int., 2015, vol. 55, pp. 36-66.CrossRefGoogle Scholar
  31. 31.
    S. He, G. Zhang, and Q. Wang: ISIJ Int., 2012, vol. 52, pp. 977-83.CrossRefGoogle Scholar
  32. 32.
    Plate bending test for metallic materials, VDA 238-100, Verband der Automobilindustrie e. V. Berlin, Germany, 2017.Google Scholar
  33. 33.
    S. Heibel, T. Dettinger, W. Nester, T. Clausmeyer, and A. E. Tekkaya: Materials, 2018, vol. 11, pp. 761-94.CrossRefGoogle Scholar
  34. 34.
    F. Zhu, P. Bai, J. Zhang, D. Lei, and X. He: Opt. Lasers. Eng., 2015, vol. 65, pp. 81-88.CrossRefGoogle Scholar
  35. 35.
    S.-H. Joo, D.-H. Pi, A. D. H. Setyawan, H. Kato, M. Janecek, Y. C. Kim, S. Lee, and H. S. Kim: Sci. Rep., 2015, vol. 5, p. 9660.CrossRefGoogle Scholar
  36. 36.
    I. Muto, Y. Izumiyama, and N. Hara: J. Electrochem. Soc., 2007, vol. 154, pp. C439-C444.CrossRefGoogle Scholar
  37. 37.
    L. Zheng, A. Malfliet, P. Wollants, B. Blanpain, and M. Guo: Metall. Mater. Trans. B, 2017, vol. 48, pp. 2447-58.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • Min Cheol Jo
    • 1
  • Selim Kim
    • 1
  • Seongwoo Kim
    • 2
  • Jinkeun Oh
    • 2
  • In Sik Suh
    • 2
  • Sunghak Lee
    • 1
    Email author
  1. 1.Center for Advanced Aerospace Materials, Pohang University of Science and TechnologyPohangRepublic of Korea
  2. 2.Steel Products Research Group, Technical Research LaboratoriesPOSCOKwangyangRepublic of Korea

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