Skip to main content
SpringerLink
Log in

Fracture Profile and Crack Propagation of Ultra-High Strength Hot-Stamped Boron Steel During Mechanical Trimming Process

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

Abstract

Mechanical trimming process for ultra-high strength boron steel after hot stamping was carried out in this study. Shear and tensile tests were designed to analyze the influences of stress state on the fracture mode; trimmed fracture surface and profile were observed and compared to other commonly used steels such as DP980 and Q235 etc.; the crack propagation during trimming process was studied through step-by-step tests. The observation and analysis reveal that the fracture mode of hot-stamped boron steel is highly related to the stress state, it belongs to cleavage fracture on low stress triaxiality but dimple fracture on high stress triaxiality. Such phenomenon is reflected in the trimming process, during which the stress state changes from shear-dominated state to tensile-dominated state. In addition, the burnish zone of trimmed boron steel is much smaller than other high strength steels, and the profile of cutting surface shows an ‘S’-like shape which is destructive to the trimming tool. Moreover, during the trimming process, most martensite laths near the cutting edge are stretched and rotated markedly to the direction of the shear band, and the main crack expands along those grain boundaries, which may penetrate through a few martensite laths and form small crack branches.

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
Fig. 9
Fig. 10
Fig. 11
Fig. 12

Similar content being viewed by others

References

  1. H. Karbasian and A.E. Tekkaya, A Review on Hot Stamping, J. Mater. Process. Technol., 2010, 210, p 2103–2118

    Article  Google Scholar 

  2. X. Han, Y. Zhong, K. Yang et al., Application of Hot Stamping Process by Integrating Quenching & Partitioning Heat Treatment to Improve Mechanical Properties, Proc. Eng., 2014, 81, p 1737–1743

    Article  Google Scholar 

  3. J. Chen, X. Li, and X. Han, Hot Stamping, Elsevier Ltd., Amsterdam, 2014, p 351–370

    Google Scholar 

  4. P. Åkerström, Modelling and Simulation of Hot Stamping, Luleå University of Technology, Department of Applied Physics and Mechanical Engineering, Luleå, 2006

    Google Scholar 

  5. M. Merklein, J. Lechler, and M. Geiger, Characterisation of the Flow Properties of the Quenchenable Ultra High Strength Steel 22MnB5, Ann. CIRP, 2006, 55(1), p 229–236

    Article  Google Scholar 

  6. P.X. Liu, Y.S. Zhang, H.Q. Liu et al., Modeling for Periodic Striation and Microstructure Evolution in Active Gas Melt Laser Cutting for Phase Hardened Parts, Int. J. Adv. Manuf. Technol., 2014, 70(5–8), p 1421–1426

    Article  Google Scholar 

  7. M. Rossini, P.R. Spena, L. Cortese et al., Investigation on Dissimilar Laser Welding of Advanced High Strength Steel Sheets for the Automotive Industry, Mater. Sci. Eng. A, 2015, 628, p 288–296

    Article  Google Scholar 

  8. K.-I. Mori, T. Maeno, and Y. Maruo, Punching of Small Hole of Die-Quenched Steel Sheets Using Local Resistance Heating, CIRP Ann. Manuf. Technol., 2012, 61(1), p 255–258

    Article  Google Scholar 

  9. A. Lara, I. Picas, and D. Casellas, Effect of the Cutting Process on the Fatigue Behaviour of Press Hardened and High Strength Dual Phase Steels, J. Mater. Process. Technol., 2013, 213(11), p 1908–1919

    Article  Google Scholar 

  10. H. So, D. Fassmann, H. Hoffmann et al., An Investigation of the Blanking Process of the Quenchable Boron Alloyed Steel 22MnB5 Before and After Hot Stamping Process, J. Mater. Process. Technol., 2012, 212(2), p 437–449

    Article  Google Scholar 

  11. H.-S. Choi, B.-M. Kim, D.-H. Kim et al., Application of Mechanical Trimming to Hot Stamped 22MnB5 Parts for Energy Saving, Int. J. Presicion Eng. Manuf., 2014, 15(6), p 1087–1093

    Article  Google Scholar 

  12. A. Horling, L. Hultman, M. Oden et al., Mechanical Properties and Machining Performance of Ti1-xAlxN-Coated Cutting Tools, Surf. Coat. Technol., 2005, 191(2–3), p 384–392

    Article  Google Scholar 

  13. A. Ghiotti, S. Bruschi, and D. Pellegrini, Influence of Die Materials on the Microstructural Evolution of HSS Sheets in Hot Stamping, Trans Tech Publications Ltd, Stafa-Zurich, 2011, p 201–208

    Google Scholar 

  14. I. Picas, R. Hernández, D. Casellas et al. Tool Performance in Cutting of Hot Stamped Steels. 1st International Conference on Hot Sheet Metal Forming of High-Performance Steel, 2008, p 179–189

  15. V. Savic, L.G. Hector. Tensile Deformation and Fracture of Press Hardened Boron Steel Using Digital Image Correlation. SAE Technical Paper, 2007

  16. G. Avramovic-Cingara, Y. Ososkov, M. Jain et al., Effect of Martensite Distribution on Damage Behaviour in DP600 Dual Phase Steels, Mater. Sci. Eng., 2009, 516(1), p 7–16

    Article  Google Scholar 

  17. S.Q. Zhang, Y.H. Huang, B.T. Sun et al., Effect of Nb on Hydrogen-Induced Delayed Fracture in High Strength Hot Stamping Steels, Mater. Sci. Eng. A, 2015, 626, p 136–143

    Article  Google Scholar 

  18. Y. Bao, Dependence of Ductile Crack Formation in Tensile Tests on Stress Triaxiality, Stress and Strain Ratios, Eng. Fracture Mech., 2005, 72, p 505–522

    Article  Google Scholar 

  19. D.C. Wen, Erosion and Wear Behavior of Nitrocarburized DC53 Tool Steel, Wear, 2010, 268(3–4), p 629–636

    Article  Google Scholar 

  20. C. Hubert, L. Dubar, M. Dubar et al., Experimental Simulation of Strip Edge Cracking in Steel Rolling Sequences, J. Mater. Process. Technol., 2010, 210, p 1587–1597

    Article  Google Scholar 

  21. Y. Sun, X. Li, X. Yu et al., Fracture Morphologies of Advanced High Strength Steel During Deformation, Acta Metallurg. Sinica (English Letters), 2014, 27(1), p 101–106

    Article  Google Scholar 

Download references

Acknowledgments

The authors are pleased to acknowledge the support of this work by the National Natural Science Foundation of China through contract/Grant Number 51105247.

Author information

Authors and Affiliations

  1. Institute of Forming Technology & Equipment, Shanghai Jiao Tong University, Shanghai, 200030, China

    Xianhong Han, Kun Yang, Sisi Chen & Jun Chen

  2. Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA

    Xianhong Han

  3. Institute of chemical material, CAEP, Mianyang, 621900, China

    Kun Yang

Authors
  1. Xianhong Han
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kun Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Sisi Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Jun Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Xianhong Han.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Han, X., Yang, K., Chen, S. et al. Fracture Profile and Crack Propagation of Ultra-High Strength Hot-Stamped Boron Steel During Mechanical Trimming Process. J. of Materi Eng and Perform 24, 3845–3851 (2015). https://doi.org/10.1007/s11665-015-1690-z

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11665-015-1690-z

Keyword

Search

Navigation