Elucidating the deformation behaviour of DX54 steel under a continuous strain path change
Continuous strain path changes significantly influence material formability in industrial stamping. A deeper understanding of this effect requires investigating the evolution of crystallographic texture and the underlying deformation mechanisms. This study investigates the impact of a uniaxial to bi...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425016035 |
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| Summary: | Continuous strain path changes significantly influence material formability in industrial stamping. A deeper understanding of this effect requires investigating the evolution of crystallographic texture and the underlying deformation mechanisms. This study investigates the impact of a uniaxial to biaxial continuous strain path change on the microstructure and texture evolution of DX54 steel. Cruciform samples were tested in-situ using electron backscatter diffraction in a scanning electron microscope (SEM), with additional digital image correlation experiments conducted outside the SEM to monitor strain evolution. The uniaxial path accumulated higher effective strain before the transition, resulting in a more pronounced texture than in the subsequent biaxial path, particularly along the α- and γ-fibers. Visco-plastic self-consistent (VPSC) simulations were used to predict texture evolution and elucidate the dominant deformation mechanisms. VPSC simulations incorporating latent hardening yielded more accurate texture predictions than those with isotropic hardening, especially in the uniaxial path. VPSC results indicated a sharp increase in active slip systems during the strain path change. A transition in slip activity was observed, with {110}<111> slip decreasing and {112}<111> slip becoming dominant at later stages of deformation in both strain paths. This enhanced {112}<111> activity contributed to the strengthening of the α-fiber at the {114}<110> and γ-fiber at the {111}<110> texture components, thereby influencing strain hardening behaviour during deformation along both strain paths. |
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| ISSN: | 2238-7854 |