Investigation of the Edge Crack Sensitivity of Cold Rolled Hot-Dip Galvanized DP780 Steels

Han, Yang‐Kyoo; Chu, Xiaodong; Kuang, Shuang; Tao, Li; Xie, Chunqian; Hai-wen, Teng

doi:10.1007/s11665-018-3774-z

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…Dual-phase (DP) steels provide excellent formability and high strength to weight ratio [1]. They have attracted particular attention due to new environmental initiatives adopted by car industry to reduce the weight and to increase the safety of the car [2]. However, DP steels suffer from the low edge ductility or premature fracture at shear cut edges below the forming limit curves (FLC) [3].…”

Section: Introductionmentioning

confidence: 99%

Measurement of edge fracture strain of dual-phase steels by in-plane bending test

Khalilabad

Perdahcıoğlu

Atzema

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Edge ductility of dual phase steels is highly affected by the preparation of the edge and especially shear cutting has a detrimental effect on the formability. In this study, a novel in-plane bending test is used to characterize the edge ductility of dual-phase steels. Digital image correlation technique is employed to calculate the fracture strain along the edge in the desired material orientation. The proposed test setup isolates the material-dependent aspects, namely damage and hardening, from those resulting from testing procedure factors such as contact stresses and friction compared to conventional hole expansion capacity (HEC) test. The results show that the edge crack phenomenon depends on the material orientation.

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Section: Introductionmentioning

confidence: 99%

Measurement of edge fracture strain of dual-phase steels by in-plane bending test

Khalilabad

Perdahcıoğlu

Atzema

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Dual-phase (DP) steels provide excellent formability and high strength-to-weight ratio (Ref 1, 2). They have attracted particular attention due to new environmental initiatives adopted by the car industry to reduce the weight and to increase the safety of the car ( Ref 3,4). However, DP steels suffer from low edge ductility or premature fracture at shear cut edges below the forming limit curves (FLC) (Ref 5).…”

Section: Introductionmentioning

confidence: 99%

An In-Plane Bending Test to Characterize Edge Ductility in High-Strength Steels

Khalilabad

Perdahcıoğlu

Atzema

et al. 2022

J. of Materi Eng and Perform

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A novel in-plane bending test was used to study edge ductility in DP800 as a common advanced high-strength steel in the car industry. The test utilized the digital image correlation technique to measure the local and average fracture strain values along the edge of the specimen. In contrast to the widely used hole expansion capacity test, the impact of punch friction, contact stress, and out-of-plane strain on edge ductility is eliminated by removing the punch. Also, the strain gradient inherent to the beam bending provides a controlled crack propagation path, making crack tracking easier than the sheared edge tensile test. The proposed bending test was utilized to investigate the influence of material orientation, cutting parameters, and global strain gradient on edge fracture strain. A correlation was observed between edge ductility, material orientation, and cutting tool sharpness, while the average fracture strain was independent of the strain gradient. The outcome shows that the in-plane bending test is reliable for determining edge ductility in any desired material orientation.

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Stretch Flangeability of Low Carbon Micro-alloyed Ferrite-Pearlite and Ferrite-Bainite Steel

Kumar,

Mandal,

Mukherjee

2024

Metall Mater Trans A

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Investigation of the Edge Crack Sensitivity of Cold Rolled Hot-Dip Galvanized DP780 Steels

Cited by 8 publications

References 24 publications

Measurement of edge fracture strain of dual-phase steels by in-plane bending test

Measurement of edge fracture strain of dual-phase steels by in-plane bending test

An In-Plane Bending Test to Characterize Edge Ductility in High-Strength Steels

Stretch Flangeability of Low Carbon Micro-alloyed Ferrite-Pearlite and Ferrite-Bainite Steel

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