Details
| Original language | English |
|---|---|
| Article number | 1800196 |
| Journal | Steel research international |
| Volume | 89 |
| Issue number | 10 |
| Publication status | Published - 31 Jul 2018 |
Abstract
In the last decade, press-hardening of manganese-boron steels for the manufacturing of safety-relevant components has become a well-established industrial process. Thereby, very high strengths are achieved with pure martensitic microstructures. However, in certain areas of the car body structure more ductile components are necessary to absorb crash energy. For tailoring the material properties, two- or multiphase microstructures can be induced by rolling and heat treatment processes. The press-hardening steel 22MnB5 which is employed in the present study, is used to manufacture three different ferritic-martensitic microstructures. These different materials are characterized by classical mechanical models, based on experimental results. For the mechanical description of the initial yield stress depending on the stress state of different multiphase steels, the Hill model is calibrated. The elastic limit and the kinematic hardening of three various heat treatment conditions are determined using conventional tensile tests and the Galimel test, respectively. Therefore, the applied mathematical relations are derived and adapted for the performed investigations. The relationship between the load conditions and the proper application of the equations are explained. The resulting microstructures are characterized and the ramifications with respect to their energy absorption capability are discussed.
Keywords
- heat treatment, low-alloyed steel (22MnB5), mechanical characterization, microscopy, optical metallography, partial martensitic steel
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Steel research international, Vol. 89, No. 10, 1800196, 31.07.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of Different Intercritical Annealing Treatments without and with Overaging on the Mechanical Material Behavior
AU - Wolf, Lars Oliver
AU - Cordebois, Jean Pierre
AU - Rodman, Dmytro
AU - Nürnberger, Florian
AU - Maier, Hans Jürgen
N1 - Funding information: The authors thank the German Research Foundation (DFG) for financial support of the project “Process Adapted Dual Phase Steels” within the framework of the International Research and Training Group (IRTG) 1627.
PY - 2018/7/31
Y1 - 2018/7/31
N2 - In the last decade, press-hardening of manganese-boron steels for the manufacturing of safety-relevant components has become a well-established industrial process. Thereby, very high strengths are achieved with pure martensitic microstructures. However, in certain areas of the car body structure more ductile components are necessary to absorb crash energy. For tailoring the material properties, two- or multiphase microstructures can be induced by rolling and heat treatment processes. The press-hardening steel 22MnB5 which is employed in the present study, is used to manufacture three different ferritic-martensitic microstructures. These different materials are characterized by classical mechanical models, based on experimental results. For the mechanical description of the initial yield stress depending on the stress state of different multiphase steels, the Hill model is calibrated. The elastic limit and the kinematic hardening of three various heat treatment conditions are determined using conventional tensile tests and the Galimel test, respectively. Therefore, the applied mathematical relations are derived and adapted for the performed investigations. The relationship between the load conditions and the proper application of the equations are explained. The resulting microstructures are characterized and the ramifications with respect to their energy absorption capability are discussed.
AB - In the last decade, press-hardening of manganese-boron steels for the manufacturing of safety-relevant components has become a well-established industrial process. Thereby, very high strengths are achieved with pure martensitic microstructures. However, in certain areas of the car body structure more ductile components are necessary to absorb crash energy. For tailoring the material properties, two- or multiphase microstructures can be induced by rolling and heat treatment processes. The press-hardening steel 22MnB5 which is employed in the present study, is used to manufacture three different ferritic-martensitic microstructures. These different materials are characterized by classical mechanical models, based on experimental results. For the mechanical description of the initial yield stress depending on the stress state of different multiphase steels, the Hill model is calibrated. The elastic limit and the kinematic hardening of three various heat treatment conditions are determined using conventional tensile tests and the Galimel test, respectively. Therefore, the applied mathematical relations are derived and adapted for the performed investigations. The relationship between the load conditions and the proper application of the equations are explained. The resulting microstructures are characterized and the ramifications with respect to their energy absorption capability are discussed.
KW - heat treatment
KW - low-alloyed steel (22MnB5)
KW - mechanical characterization
KW - microscopy
KW - optical metallography
KW - partial martensitic steel
UR - http://www.scopus.com/inward/record.url?scp=85054197987&partnerID=8YFLogxK
U2 - 10.1002/srin.201800196
DO - 10.1002/srin.201800196
M3 - Article
AN - SCOPUS:85054197987
VL - 89
JO - Steel research international
JF - Steel research international
SN - 1611-3683
IS - 10
M1 - 1800196
ER -