Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022 |
| Herausgeber/-innen | Gabriela Vincze, Frédéric Barlat |
| Seiten | 547-558 |
| Seitenumfang | 12 |
| Publikationsstatus | Veröffentlicht - 2022 |
| Veranstaltung | 25th International Conference on Material Forming, ESAFORM 2022 - Braga, Portugal Dauer: 27 Apr. 2022 → 29 Apr. 2022 |
Publikationsreihe
| Name | Key Engineering Materials |
|---|---|
| Band | 926 KEM |
| ISSN (Print) | 1013-9826 |
| ISSN (elektronisch) | 1662-9795 |
Abstract
Hot forging is a complex process involving the mutual influence of numerous thermo-mechanical-metallurgical material phenomena. In particular, the strains of transformation-induced plasticity (TRIP) have a significant influence on the distortions and residual stresses of the components. The TRIP strains refer to the anisotropic strains depending on the orientation and significance of the stress conditions during cooling superimposed to the phase transformation. With the use of numerical models, the impact of this effect can be investigated in order to ensure the production of high quality components. However, an experimental determination of the characteristic values of TRIP is challenging, which is why only few corresponding data are available in the literature. Therefore, this paper presents an experimental and numerical methodology as well as the results of studies on the interaction between stresses and phase transformations in the materials AISI 4140 and AISI 52100. The investigations of the TRIP strains are carried out using hollow specimens, which are thermo-mechanically treated in the physical forming simulator Gleeble 3800-GTC. The specimens are austenitised, quenched to test temperature and held there while diffusion controlled phase transformation takes place. The extent of TRIP as a result of different superimposed tensile or compressive loads is determined by means of dilatometry. In addition, the extent of TRIP for diffusionless martensitic phase transformations was investigated by continuous cooling tests under tensile and compressive loads. It was found that the transformation plasticity varies depending on the material, the phase type, the temperature and the tensile or compressive stresses. Subsequently, simulations of the physical experiments using the FE software Simufact. Forming verified the determined phase specific values of TRIP.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Ingenieurwesen (insg.)
- Werkstoffmechanik
- Ingenieurwesen (insg.)
- Maschinenbau
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Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022. Hrsg. / Gabriela Vincze; Frédéric Barlat. 2022. S. 547-558 (Key Engineering Materials; Band 926 KEM).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Methodology to Investigate the Transformation Plasticity for Numerical Modelling of Hot Forging Processes
AU - Behrens, Bernd Arno
AU - Brunotte, Kai
AU - Wester, Hendrik
AU - Kock, Christoph
N1 - Funding Information: This study was funded by the German Research Foundation (DFG, Deutsche Forschungsgemeinschaft) - 212963651 (BE 1691/142-2) as well as 374871564 (BE 1691/223-2) within the priority program SPP 2013.
PY - 2022
Y1 - 2022
N2 - Hot forging is a complex process involving the mutual influence of numerous thermo-mechanical-metallurgical material phenomena. In particular, the strains of transformation-induced plasticity (TRIP) have a significant influence on the distortions and residual stresses of the components. The TRIP strains refer to the anisotropic strains depending on the orientation and significance of the stress conditions during cooling superimposed to the phase transformation. With the use of numerical models, the impact of this effect can be investigated in order to ensure the production of high quality components. However, an experimental determination of the characteristic values of TRIP is challenging, which is why only few corresponding data are available in the literature. Therefore, this paper presents an experimental and numerical methodology as well as the results of studies on the interaction between stresses and phase transformations in the materials AISI 4140 and AISI 52100. The investigations of the TRIP strains are carried out using hollow specimens, which are thermo-mechanically treated in the physical forming simulator Gleeble 3800-GTC. The specimens are austenitised, quenched to test temperature and held there while diffusion controlled phase transformation takes place. The extent of TRIP as a result of different superimposed tensile or compressive loads is determined by means of dilatometry. In addition, the extent of TRIP for diffusionless martensitic phase transformations was investigated by continuous cooling tests under tensile and compressive loads. It was found that the transformation plasticity varies depending on the material, the phase type, the temperature and the tensile or compressive stresses. Subsequently, simulations of the physical experiments using the FE software Simufact. Forming verified the determined phase specific values of TRIP.
AB - Hot forging is a complex process involving the mutual influence of numerous thermo-mechanical-metallurgical material phenomena. In particular, the strains of transformation-induced plasticity (TRIP) have a significant influence on the distortions and residual stresses of the components. The TRIP strains refer to the anisotropic strains depending on the orientation and significance of the stress conditions during cooling superimposed to the phase transformation. With the use of numerical models, the impact of this effect can be investigated in order to ensure the production of high quality components. However, an experimental determination of the characteristic values of TRIP is challenging, which is why only few corresponding data are available in the literature. Therefore, this paper presents an experimental and numerical methodology as well as the results of studies on the interaction between stresses and phase transformations in the materials AISI 4140 and AISI 52100. The investigations of the TRIP strains are carried out using hollow specimens, which are thermo-mechanically treated in the physical forming simulator Gleeble 3800-GTC. The specimens are austenitised, quenched to test temperature and held there while diffusion controlled phase transformation takes place. The extent of TRIP as a result of different superimposed tensile or compressive loads is determined by means of dilatometry. In addition, the extent of TRIP for diffusionless martensitic phase transformations was investigated by continuous cooling tests under tensile and compressive loads. It was found that the transformation plasticity varies depending on the material, the phase type, the temperature and the tensile or compressive stresses. Subsequently, simulations of the physical experiments using the FE software Simufact. Forming verified the determined phase specific values of TRIP.
KW - AISI 4140
KW - AISI 52100
KW - FE-simulation
KW - Gleeble 3800-GTC
KW - Hot forging
KW - phase transformation
KW - transformation-induced plasticity
UR - http://www.scopus.com/inward/record.url?scp=85140432230&partnerID=8YFLogxK
U2 - 10.4028/p-51lv37
DO - 10.4028/p-51lv37
M3 - Conference contribution
AN - SCOPUS:85140432230
SN - 9783035717594
T3 - Key Engineering Materials
SP - 547
EP - 558
BT - Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022
A2 - Vincze, Gabriela
A2 - Barlat, Frédéric
T2 - 25th International Conference on Material Forming, ESAFORM 2022
Y2 - 27 April 2022 through 29 April 2022
ER -