Details
| Original language | English |
|---|---|
| Pages (from-to) | 1815-1820 |
| Number of pages | 6 |
| Journal | Procedia Engineering |
| Volume | 207 |
| Publication status | Published - 15 Nov 2017 |
| Event | International Conference on the Technology of Plasticity, ICTP 2017 - Hucisko, United Kingdom (UK) Duration: 17 Sept 2017 → 22 Sept 2017 |
Abstract
Hot forming as a coupled thermo-mechanical process comprises of numerous material phenomena with a corresponding impact on the material behavior during and after the forming process. Within the subsequent heat treatment, possible rapid cooling of the hot formed parts leads to the diffusionless decomposition of austenite into martensite. In this context, in addition to the elastic, plastic and linear thermal strain components, complex isotropic as well as anisotropic transformation strains can occur. Irreversible anisotropic transformation strains account for the plastic deformation at the phase boundary between the emerging and the parent phase and are related to the transformation induced plasticity (TRIP or TP) phenomena. Moreover, TRIP strains can be reduced or amplified by varying the current stress state. These phenomena significantly contribute to the final residual stress state and may be responsible for the cost-intensive component defects arising due to thermal shrinkage. This study aims at developing an FE-based material model in order to describe and quantitatively visualize stress dependence of the transformation induced anisotropic strains for a typical forging steel 42CrMo4. The developed material model as well as the aspects of its implementation in a commercial FE-system (Simufact.forming) is presented. Consequently, the discussed material model is tested by comparison of experimental and numerical results with respect to resulting dilatation under various stress states.
Keywords
- 42CrMo4, finite element analysis, multiscale material modelling, transformation induced plasticity
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
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In: Procedia Engineering, Vol. 207, 15.11.2017, p. 1815-1820.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Numerical and experimental investigations of the anisotropic transformation strains during martensitic transformation in a low alloy Cr-Mo steel 42CrMo4
AU - Behrens, Bernd Arno
AU - Bouguecha, Anas
AU - Bonk, Christian
AU - Chugreev, Alexander
N1 - Funding information: The authors wish to express sincere thanks to the German Research Foundation (DFG) for financial support of the research project BE1691/142-1 Siulatiom“n of te h undesired distortions in hot forged and subsequently heat trpeatedeocontsconnidme seriingacmt fnteadsutressytate sstnotrhrfsatiopnmicitlast”.y
PY - 2017/11/15
Y1 - 2017/11/15
N2 - Hot forming as a coupled thermo-mechanical process comprises of numerous material phenomena with a corresponding impact on the material behavior during and after the forming process. Within the subsequent heat treatment, possible rapid cooling of the hot formed parts leads to the diffusionless decomposition of austenite into martensite. In this context, in addition to the elastic, plastic and linear thermal strain components, complex isotropic as well as anisotropic transformation strains can occur. Irreversible anisotropic transformation strains account for the plastic deformation at the phase boundary between the emerging and the parent phase and are related to the transformation induced plasticity (TRIP or TP) phenomena. Moreover, TRIP strains can be reduced or amplified by varying the current stress state. These phenomena significantly contribute to the final residual stress state and may be responsible for the cost-intensive component defects arising due to thermal shrinkage. This study aims at developing an FE-based material model in order to describe and quantitatively visualize stress dependence of the transformation induced anisotropic strains for a typical forging steel 42CrMo4. The developed material model as well as the aspects of its implementation in a commercial FE-system (Simufact.forming) is presented. Consequently, the discussed material model is tested by comparison of experimental and numerical results with respect to resulting dilatation under various stress states.
AB - Hot forming as a coupled thermo-mechanical process comprises of numerous material phenomena with a corresponding impact on the material behavior during and after the forming process. Within the subsequent heat treatment, possible rapid cooling of the hot formed parts leads to the diffusionless decomposition of austenite into martensite. In this context, in addition to the elastic, plastic and linear thermal strain components, complex isotropic as well as anisotropic transformation strains can occur. Irreversible anisotropic transformation strains account for the plastic deformation at the phase boundary between the emerging and the parent phase and are related to the transformation induced plasticity (TRIP or TP) phenomena. Moreover, TRIP strains can be reduced or amplified by varying the current stress state. These phenomena significantly contribute to the final residual stress state and may be responsible for the cost-intensive component defects arising due to thermal shrinkage. This study aims at developing an FE-based material model in order to describe and quantitatively visualize stress dependence of the transformation induced anisotropic strains for a typical forging steel 42CrMo4. The developed material model as well as the aspects of its implementation in a commercial FE-system (Simufact.forming) is presented. Consequently, the discussed material model is tested by comparison of experimental and numerical results with respect to resulting dilatation under various stress states.
KW - 42CrMo4
KW - finite element analysis
KW - multiscale material modelling
KW - transformation induced plasticity
UR - http://www.scopus.com/inward/record.url?scp=85036626684&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2017.10.944
DO - 10.1016/j.proeng.2017.10.944
M3 - Conference article
AN - SCOPUS:85036626684
VL - 207
SP - 1815
EP - 1820
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
T2 - International Conference on the Technology of Plasticity, ICTP 2017
Y2 - 17 September 2017 through 22 September 2017
ER -