Comparative analysis of forming performance of 800 MPa grade galvanized dual-phase steels with different components

ZHANG Xi; TONG Lianjie; LIU Lixue; WANG Jiawei; WANG Hailong

doi:10.7513/j.issn.1004-7638.2026.01.019

Volume 47 Issue 1

Feb. 2026

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ZHANG Xi, TONG Lianjie, LIU Lixue, WANG Jiawei, WANG Hailong. Comparative analysis of forming performance of 800 MPa grade galvanized dual-phase steels with different components[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 165-170. doi: 10.7513/j.issn.1004-7638.2026.01.019

Citation:

ZHANG Xi, TONG Lianjie, LIU Lixue, WANG Jiawei, WANG Hailong. Comparative analysis of forming performance of 800 MPa grade galvanized dual-phase steels with different components[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 165-170. doi: 10.7513/j.issn.1004-7638.2026.01.019

Citation:

ZHANG Xi, TONG Lianjie, LIU Lixue, WANG Jiawei, WANG Hailong. Comparative analysis of forming performance of 800 MPa grade galvanized dual-phase steels with different components[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 165-170. doi: 10.7513/j.issn.1004-7638.2026.01.019

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Comparative analysis of forming performance of 800 MPa grade galvanized dual-phase steels with different components

doi: 10.7513/j.issn.1004-7638.2026.01.019

1.
Technology Center, Tangshan Iron and Steel Group Co., Ltd., Tangshan 063000, Hebei, China
2.
School of Mechanical and Electrical Engineering, Tangshan University, Tangshan 063000, Hebei, China

More Information

Received Date: 2025-10-10
Accepted Date: 2025-12-22
Rev Recd Date: 2025-12-21

Available Online: 2026-02-25

Publish Date: 2026-02-25

Abstract

Abstract

This study comparatively investigated the forming performance of two 800 MPa grade galvanized dual-phase steel systems, using metallographic analysis, uniaxial tensile testing, forming limit diagrams (FLDs), hole expansion tests, and local/global formability assessment diagrams. The study found that both dual-phase steels exhibited a ferrite-martensite dual-phase microstructure with a similar martensite fraction of ～50%. The high-carbon series dual-phase steel demonstrated a lower yield ratio (0.563), higher uniform elongation (15.65%), and a higher FLD₀ (0.236), but a lower hole expansion ratio (19.62%), making it suitable for complex structural components and parts demanding high drawability, such as B-pillars and longitudinal beam connecting plates. In contrast, the low-carbon series dual-phase steel, achieved through the addition of alloying elements such as Cr and Mo, resulting in a uniform, fine, and dispersed distribution of martensite islands, with a slightly higher yield ratio (0.58), lower uniform elongation (11.72%), and a lower FLD₀ (0.184), but a significantly higher hole expansion ratio (25.68%), making it more suitable for components requiring high local formability, such as flanging and hole expansion applications, including door sills, side rails, and seat side panels. This research provides a theoretical foundation and practical guidance for the material selection and application of 800 MPa grade galvanized dual-phase steel.
- chemical component,
- dual-phase steels,
- global formability,
- local formability

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References(17)

References

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