Effect of hydrostatic stress on the strength differential effect in low-carbon steel sheet
SCIE
SCOPUS
- Title
- Effect of hydrostatic stress on the strength differential effect in low-carbon steel sheet
- Authors
- Kuwabara, Toshihiko; Tachibana, Ren; Takada, Yusuke; Koizumi, Takayuki; Coppieters, Sam; Barlat, Fréderic
- Date Issued
- 2022-03
- Publisher
- Springer-Verlag France
- Abstract
- The effect of hydrostatic stress on the strength differential effect (SDE) in a 0.8-mm-thick low-carbon steel sheet is experimentally investigated. The in-plane compressive stress-strain curve is approximately 10% higher than the uniaxial tensile stress-strain curve at a strain of 0.15, confirming that the test sample exhibited the SDE. A stack compression test in the thickness direction of the test sample is also performed. The measured through-thickness uniaxial compressive stress-strain curve is found to be higher than the equibiaxial tensile stress–thickness plastic strain curves measured using a cruciform equibiaxial tension test (ISO 16842) and a hydraulic bulge test (ISO 16808), indicating a positive correlation between hydrostatic pressure and flow stress. From these experiments, we conclude that the SDE in a low-carbon steel sheet is caused by the effect of hydrostatic pressure on flow stress. However, the pressure coefficient of the test sample, 50−150 TPa−1, is found to be significantly higher than those for high-strength steel alloys and Fe single crystals (13−23 TPa−1) reported by Richmond and Spitzig (1980).
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110296
- DOI
- 10.1007/s12289-022-01650-2
- ISSN
- 1960-6206
- Article Type
- Article
- Citation
- International Journal of Material Forming, vol. 15, no. 2, 2022-03
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- There are no files associated with this item.
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