Details
| Original language | English |
|---|---|
| Title of host publication | International Conference on Advances in Materials and Processing Technologies, AMPT2010 |
| Pages | 303-308 |
| Number of pages | 6 |
| Publication status | Published - 27 Jan 2010 |
| Event | International Conference on Advances in Materials and Processing Technologies, AMPT2010 - Paris, France Duration: 24 Oct 2010 → 27 Oct 2010 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1315 |
| ISSN (Print) | 0094-243X |
| ISSN (electronic) | 1551-7616 |
Abstract
Hot forging dies are exposed during service to a combination of cyclic thermo-mechanical, 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 analysis (FEA) may serve as a means for process design and process optimisation. So far the FEA 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. Two industrial forging processes, where clear fatigue crack initiation has been observed are considered for a fatigue analysis. For this purpose the relevant tool components are 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 based fatigue life estimation, forging, thermo-mechanical fatigue
ASJC Scopus subject areas
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International Conference on Advances in Materials and Processing Technologies, AMPT2010. 2010. p. 303-308 (AIP Conference Proceedings; Vol. 1315).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - FEA Based Tool Life Quantity Estimation of Hot Forging Dies Under Cyclic Thermo‐Mechanical Loads
AU - Behrens, B. A.
AU - Bouguecha, A.
AU - Schäfer, F.
AU - Hadifi, T.
PY - 2010/1/27
Y1 - 2010/1/27
N2 - Hot forging dies are exposed during service to a combination of cyclic thermo-mechanical, 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 analysis (FEA) may serve as a means for process design and process optimisation. So far the FEA 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. Two industrial forging processes, where clear fatigue crack initiation has been observed are considered for a fatigue analysis. For this purpose the relevant tool components are 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 thermo-mechanical, 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 analysis (FEA) may serve as a means for process design and process optimisation. So far the FEA 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. Two industrial forging processes, where clear fatigue crack initiation has been observed are considered for a fatigue analysis. For this purpose the relevant tool components are 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 based fatigue life estimation
KW - forging
KW - thermo-mechanical fatigue
UR - http://www.scopus.com/inward/record.url?scp=79952553360&partnerID=8YFLogxK
U2 - 10.1063/1.3552459
DO - 10.1063/1.3552459
M3 - Conference contribution
AN - SCOPUS:79952553360
SN - 9780735408715
T3 - AIP Conference Proceedings
SP - 303
EP - 308
BT - International Conference on Advances in Materials and Processing Technologies, AMPT2010
T2 - International Conference on Advances in Materials and Processing Technologies, AMPT2010
Y2 - 24 October 2010 through 27 October 2010
ER -