Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings 29th International Conference on Metallurgy and Materials |
| Pages | 579-584 |
| Number of pages | 6 |
| ISBN (electronic) | 9788087294970 |
| Publication status | Published - 27 Jul 2020 |
| Event | 29th International Conference on Metallurgy and Materials, METAL 2020 - Brno, Czech Republic Duration: 20 May 2020 → 22 May 2020 |
Abstract
Due to their high tensile strengths increasing the crashworthiness of the vehicles, ultra-high strength steels are increasingly used in the automotive industry, for example in components like B-pillars or tunnel. 22MnB5 is a premier candidate for this cause, since it can be press-hardened and phase-transformed into the martensitic phase, resulting in high hardness and tensile strength. However, complications can arise in the assembly of press-hardened components since conventional mechanical joining processes have their limitations due to high forces required for joining press-hardened steels, especially in multi-sheet layers. Therefore, this study focuses on the determination of an optimum process window to influence the 22MnB5 microstructure thermo-mechanically during press hardening, causing a local softening. This so-called deformation-induced ferrite improves ductility at the desired locations to ease the mechanical joining operation in the assembly. Investigations are performed on a forming dilatometer varying the cooling rate, the introduced amount of plastic strain and the forming temperature along with metallographic as well as microhardness measurements. Based on the laboratory tests, a process window of the deformation induced ferrite is derived for an application in a forming press.
Keywords
- Deformation induced ferrite, Manganese boron steel, Press hardening
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Surfaces, Coatings and Films
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Proceedings 29th International Conference on Metallurgy and Materials. 2020. p. 579-584.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigation Of The Process Window For Deformation Induced Ferrite To Improve The Joinability Of Press-Hardened Components
AU - Behrens, Bernd Arno
AU - Brunotte, Kai
AU - Wester, Hendrik
AU - Stockburger, Eugen
N1 - Funding Information: The presented results are based on the framework of the research project “Local material influence during press hardening to improve the joinability of components made of 22MnB5” (grant number 19797 BG). The authors would like to thank the Research Association for Steel Application (FOSTA) and the German Federation of Industrial Research Associations (AiF) for the financial support.
PY - 2020/7/27
Y1 - 2020/7/27
N2 - Due to their high tensile strengths increasing the crashworthiness of the vehicles, ultra-high strength steels are increasingly used in the automotive industry, for example in components like B-pillars or tunnel. 22MnB5 is a premier candidate for this cause, since it can be press-hardened and phase-transformed into the martensitic phase, resulting in high hardness and tensile strength. However, complications can arise in the assembly of press-hardened components since conventional mechanical joining processes have their limitations due to high forces required for joining press-hardened steels, especially in multi-sheet layers. Therefore, this study focuses on the determination of an optimum process window to influence the 22MnB5 microstructure thermo-mechanically during press hardening, causing a local softening. This so-called deformation-induced ferrite improves ductility at the desired locations to ease the mechanical joining operation in the assembly. Investigations are performed on a forming dilatometer varying the cooling rate, the introduced amount of plastic strain and the forming temperature along with metallographic as well as microhardness measurements. Based on the laboratory tests, a process window of the deformation induced ferrite is derived for an application in a forming press.
AB - Due to their high tensile strengths increasing the crashworthiness of the vehicles, ultra-high strength steels are increasingly used in the automotive industry, for example in components like B-pillars or tunnel. 22MnB5 is a premier candidate for this cause, since it can be press-hardened and phase-transformed into the martensitic phase, resulting in high hardness and tensile strength. However, complications can arise in the assembly of press-hardened components since conventional mechanical joining processes have their limitations due to high forces required for joining press-hardened steels, especially in multi-sheet layers. Therefore, this study focuses on the determination of an optimum process window to influence the 22MnB5 microstructure thermo-mechanically during press hardening, causing a local softening. This so-called deformation-induced ferrite improves ductility at the desired locations to ease the mechanical joining operation in the assembly. Investigations are performed on a forming dilatometer varying the cooling rate, the introduced amount of plastic strain and the forming temperature along with metallographic as well as microhardness measurements. Based on the laboratory tests, a process window of the deformation induced ferrite is derived for an application in a forming press.
KW - Deformation induced ferrite
KW - Manganese boron steel
KW - Press hardening
UR - http://www.scopus.com/inward/record.url?scp=85096768963&partnerID=8YFLogxK
U2 - 10.37904/metal.2020.3523
DO - 10.37904/metal.2020.3523
M3 - Conference contribution
AN - SCOPUS:85096768963
SP - 579
EP - 584
BT - Proceedings 29th International Conference on Metallurgy and Materials
T2 - 29th International Conference on Metallurgy and Materials, METAL 2020
Y2 - 20 May 2020 through 22 May 2020
ER -