| Issue |
MATEC Web Conf.
Volume 408, 2025
44th Conference of the International Deep Drawing Research Group (IDDRG 2025)
|
|
|---|---|---|
| Article Number | 01055 | |
| Number of page(s) | 5 | |
| Section | Full Papers | |
| DOI | https://doi.org/10.1051/matecconf/202540801055 | |
| Published online | 07 May 2025 | |
Effect of prestrain and strain path on Retained Austenite transformation and eventual fracture behavior of Q&P steels
ArcelorMittal USA Research LLC,
3001 E. Columbus Drive,
E. Chicago, IN
46312, USA
* Corresponding author: sriram.sadagopan@arcelormittal.com
Post-forming fracture behavior of Quenched & Partitioned (Q&P) steel grades can be compromised because of reduction of available Retained Austenite (RA) and formation of fresh martensite during stamping. A study was undertaken to characterize the post-forming fracture behavior of two Q&P steel grades of tensile strength 980MPa and 1180MPa. Using the Marciniak test, samples were formed to different strain levels under plane strain and balanced biaxial conditions. Following forming, samples were extracted to determine the fracture strain using the VDA238-100 bend test with Digital Image Correlation (DIC). In both steels, it was found that while the post-forming fracture strain had a strong dependence on the remaining RA after pre-straining, the strain path had a lower influence.
Key words: Q&P / Prestrain / Fracture / Partitioning
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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