Details
| Original language | English |
|---|---|
| Pages (from-to) | 1136-1142 |
| Number of pages | 7 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 25 |
| Issue number | 3 |
| Early online date | 22 Jan 2016 |
| Publication status | Published - Mar 2016 |
Abstract
To produce parts from sheet metal with thickened functional elements, bulk forming operations can be employed. For this new process class, the term sheet-bulk metal forming has been established recently. Since sheet-bulk metal forming processes such as orbital forming generates triaxial stress and strain states, ductile damage is induced in the form of voids in the microstructure. Typical parts will experience cyclic loads during service, and thus, the influence of ductile damage on the fatigue life of parts manufactured by orbital forming is of interest. Both the formation and growth of voids were characterized following this forming process and then compared to the as-received condition of the ferritic deep drawing steel DC04 chosen for this study. Subsequent to the forming operation, the specimens were fatigued and the evolution of ductile damage and the rearrangement of the dislocation networks occurring during cyclic loading were determined. It was shown, that despite an increased ductile damage due to the forming process, the induced strain hardening has a positive effect on the fatigue life of the material. However, by analyzing the fatigued specimens a development of the ductile damage by an increasing number of voids and a change in the void shape were detected.
Keywords
- DC04, ductile damage, orbital forming, sheet-bulk metal forming
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Materials Engineering and Performance, Vol. 25, No. 3, 03.2016, p. 1136-1142.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ductile Damage and Fatigue Behavior of Semi-Finished Tailored Blanks for Sheet-Bulk Metal Forming Processes
AU - Besserer, Hans Bernward
AU - Hildenbrand, Philipp
AU - Gerstein, Gregory
AU - Rodman, Dmytro
AU - Nürnberger, Florian
AU - Merklein, Marion
AU - Maier, Hans Jürgen
N1 - Funding information: The authors thank the German Research Foundation (DFG) for financial support of this study within the transregional collaborative research center SFB/TR 73 in sub-Projects A1 “Deep Drawing” and C6 “Fatigue Behavior”.
PY - 2016/3
Y1 - 2016/3
N2 - To produce parts from sheet metal with thickened functional elements, bulk forming operations can be employed. For this new process class, the term sheet-bulk metal forming has been established recently. Since sheet-bulk metal forming processes such as orbital forming generates triaxial stress and strain states, ductile damage is induced in the form of voids in the microstructure. Typical parts will experience cyclic loads during service, and thus, the influence of ductile damage on the fatigue life of parts manufactured by orbital forming is of interest. Both the formation and growth of voids were characterized following this forming process and then compared to the as-received condition of the ferritic deep drawing steel DC04 chosen for this study. Subsequent to the forming operation, the specimens were fatigued and the evolution of ductile damage and the rearrangement of the dislocation networks occurring during cyclic loading were determined. It was shown, that despite an increased ductile damage due to the forming process, the induced strain hardening has a positive effect on the fatigue life of the material. However, by analyzing the fatigued specimens a development of the ductile damage by an increasing number of voids and a change in the void shape were detected.
AB - To produce parts from sheet metal with thickened functional elements, bulk forming operations can be employed. For this new process class, the term sheet-bulk metal forming has been established recently. Since sheet-bulk metal forming processes such as orbital forming generates triaxial stress and strain states, ductile damage is induced in the form of voids in the microstructure. Typical parts will experience cyclic loads during service, and thus, the influence of ductile damage on the fatigue life of parts manufactured by orbital forming is of interest. Both the formation and growth of voids were characterized following this forming process and then compared to the as-received condition of the ferritic deep drawing steel DC04 chosen for this study. Subsequent to the forming operation, the specimens were fatigued and the evolution of ductile damage and the rearrangement of the dislocation networks occurring during cyclic loading were determined. It was shown, that despite an increased ductile damage due to the forming process, the induced strain hardening has a positive effect on the fatigue life of the material. However, by analyzing the fatigued specimens a development of the ductile damage by an increasing number of voids and a change in the void shape were detected.
KW - DC04
KW - ductile damage
KW - orbital forming
KW - sheet-bulk metal forming
UR - http://www.scopus.com/inward/record.url?scp=84961285974&partnerID=8YFLogxK
U2 - 10.1007/s11665-016-1908-8
DO - 10.1007/s11665-016-1908-8
M3 - Article
AN - SCOPUS:84961285974
VL - 25
SP - 1136
EP - 1142
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
SN - 1059-9495
IS - 3
ER -