Sensitivity of the final properties of tailored hot stamping components to the process and material parameters

Abdollahpoor, Amir, Chen, Xiangjun, Pereira, Michael P., Xiao, Namin and Rolfe, Bernard F. 2016, Sensitivity of the final properties of tailored hot stamping components to the process and material parameters, Journal of materials processing technology, vol. 228, pp. 125-136, doi: 10.1016/j.jmatprotec.2014.11.033.

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Title Sensitivity of the final properties of tailored hot stamping components to the process and material parameters
Author(s) Abdollahpoor, Amir
Chen, Xiangjun
Pereira, Michael P.ORCID iD for Pereira, Michael P.
Xiao, Namin
Rolfe, Bernard F.ORCID iD for Rolfe, Bernard F.
Journal name Journal of materials processing technology
Volume number 228
Start page 125
End page 136
Total pages 12
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-02
ISSN 0924-0136
Keyword(s) Hot stamping
Numerical modeling
Phase transformation
Summary The final mechanical properties of hot stamped components are affected by many process and material parameters due to the multidisciplinary nature of this thermal-mechanical-metallurgical process. The phase transformation, which depends on the temperature field and history, determines the final microstructure and consequently the final mechanical properties. Tailored hot stamping parts - where the cooling rates are locally chosen to achieve structures with graded properties - has been increasingly adopted in the automotive industry. In this case, the robustness of final part properties is more critical than in the conventional hot stamping parts, where the part is fully quenched. In this study, a wide range of input parameters in a generalized hot stamping model have been investigated, examining the effect on the temperature history and resulting final material properties. A generic thermo-mechanical finite element model of hot stamping was created and a modified phase transformation model, based on Scheil's additive principle, has been applied. The comparison between modeling and experiments shows that the modified phase transformation model coupled with the incubation time provides higher accuracy on the simulation of transformation kinetics history. The robustness of four conditions relevant to tailored hot stamping was investigated: heated tooling (with low and high tool conductance), air cooling, and conventional hot stamping. The results show the high robustness of the conventional hot stamping compared to tailored hot stamping, with respect to the stamped component's final material properties (i.e. phase fraction and hardness). Furthermore, tailored hot stamping showed higher robustness when low conductivity tools are used relative to high conductivity tools.
Language eng
DOI 10.1016/j.jmatprotec.2014.11.033
Field of Research 091006 Manufacturing Processes and Technologies (excl Textiles)
0910 Manufacturing Engineering
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier B.V
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