Details
| Original language | English |
|---|---|
| Title of host publication | Material Forming ESAFORM 2012 |
| Pages | 163-168 |
| Number of pages | 6 |
| Publication status | Published - 3 Feb 2012 |
| Event | 15th Conference of the European Scientific Association on Material Forming, ESAFORM 2012 - Erlangen, Germany Duration: 14 Mar 2012 → 16 Mar 2012 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 504-506 |
| ISSN (Print) | 1013-9826 |
Abstract
Hot forging dies are exposed during service to a combination of cyclic thermomechanical, tribological and chemical loads. Besides abrasive and adhesive wear on the die surface, fatigue crack initiation with subsequent fracture is one of the most frequent causes of failure. In order to extend the tool life, the finite element method (FEM) may serve as a means for process design and process optimisation. So far the FEM based estimation of the production cycles until initial cracking is limited as tool material behaviour due to repeated loading is not captured with the required accuracy. Material models which are able to account for cyclic effects are not verified for the fatigue life predictions of forging dies. Furthermore fatigue properties from strain controlled fatigue tests of relevant hot work steels are to date not available to allow for a close-to-reality fatigue life prediction. An industrial forging process, where clear fatigue crack initiation has been observed is considered for a fatigue analysis. For this purpose the relevant tool component is modelled with elasto-plastic material behaviour. The predicted sites, where crack initiation occurs, agree with the ones observed on the real die component.
Keywords
- Crack initiation, Fe simulation, Hot forging, Tool failure
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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Material Forming ESAFORM 2012. 2012. p. 163-168 (Key Engineering Materials; Vol. 504-506).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Numerical and Experimental Investigations on the Service Life Estimation for Hot-Forging Dies
AU - Behrens, Bernd Arno
AU - Bouguecha, Anas
AU - Hadifi, Tarik
AU - Klassen, Andreas
PY - 2012/2/3
Y1 - 2012/2/3
N2 - Hot forging dies are exposed during service to a combination of cyclic thermomechanical, tribological and chemical loads. Besides abrasive and adhesive wear on the die surface, fatigue crack initiation with subsequent fracture is one of the most frequent causes of failure. In order to extend the tool life, the finite element method (FEM) may serve as a means for process design and process optimisation. So far the FEM based estimation of the production cycles until initial cracking is limited as tool material behaviour due to repeated loading is not captured with the required accuracy. Material models which are able to account for cyclic effects are not verified for the fatigue life predictions of forging dies. Furthermore fatigue properties from strain controlled fatigue tests of relevant hot work steels are to date not available to allow for a close-to-reality fatigue life prediction. An industrial forging process, where clear fatigue crack initiation has been observed is considered for a fatigue analysis. For this purpose the relevant tool component is modelled with elasto-plastic material behaviour. The predicted sites, where crack initiation occurs, agree with the ones observed on the real die component.
AB - Hot forging dies are exposed during service to a combination of cyclic thermomechanical, tribological and chemical loads. Besides abrasive and adhesive wear on the die surface, fatigue crack initiation with subsequent fracture is one of the most frequent causes of failure. In order to extend the tool life, the finite element method (FEM) may serve as a means for process design and process optimisation. So far the FEM based estimation of the production cycles until initial cracking is limited as tool material behaviour due to repeated loading is not captured with the required accuracy. Material models which are able to account for cyclic effects are not verified for the fatigue life predictions of forging dies. Furthermore fatigue properties from strain controlled fatigue tests of relevant hot work steels are to date not available to allow for a close-to-reality fatigue life prediction. An industrial forging process, where clear fatigue crack initiation has been observed is considered for a fatigue analysis. For this purpose the relevant tool component is modelled with elasto-plastic material behaviour. The predicted sites, where crack initiation occurs, agree with the ones observed on the real die component.
KW - Crack initiation
KW - Fe simulation
KW - Hot forging
KW - Tool failure
UR - http://www.scopus.com/inward/record.url?scp=84857155262&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.504-506.163
DO - 10.4028/www.scientific.net/KEM.504-506.163
M3 - Conference contribution
AN - SCOPUS:84857155262
SN - 9783037853665
T3 - Key Engineering Materials
SP - 163
EP - 168
BT - Material Forming ESAFORM 2012
T2 - 15th Conference of the European Scientific Association on Material Forming, ESAFORM 2012
Y2 - 14 March 2012 through 16 March 2012
ER -