Deep drawing and bulging forming limit of dual-phase steel under different mechanical properties

Kong, Ning; Zhang, Jie; Kong, Ning

doi:10.1007/s00170-018-1980-3

Cited by 13 publications

(11 citation statements)

References 27 publications

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“…In order to quantify the differences of the stress–strain relationship, the Swift formula shown in Equation was selected for fitting the true stress–strain curve. The detailed processing method was the same as that in reference . The strength coefficient K and strain hardening exponent n for the experimental and calculated true stress–strain curves were shown in Table .…”

Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 82%

“…DP780 steel is a typical grade of DP steel. Two industrial produced DP780 sheet steels from different production lines, named as material A and material B were studied in this paper, which were the same as those studied in reference . The thickness of material A is 1.56 mm while that of 1.38 mm with material B.…”

Section: Differences Of Chemical Compositions and Microstructures Formentioning

confidence: 99%

“…In the FEA simulation, the calculated true stress–strain curves for material A and B were illustrated in Figure . As a contrast, the experimental true stress–strain curves for material A and B were also illustrated in Figure 5 …”

Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 99%

“…It was clear that the elongation of material B was higher than that of material A. From the result of the uniaxial tensile test, the elongation of material B was 22.75% and the materials A was 20.09%, which verified the results and the analysis method in this work.…”

Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 99%

“…In the previous study, Kong et al had found that the limit drawing stroke and limit dome height at fracture of DP780 steels under different mechanical properties were distinct and it concluded the quantitative effects of strength coefficient K , strain hardening exponent n , Lankford coefficient r , and thickness t on the deep drawing and bulging forming limit of DP steel. It is significant to conduct a further investigation on the inconsistencies of chemical compositions and microstructures, and their effects on the mechanical properties of DP steel were quantitative.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study on the Effects of Chemical Composition and Microstructure Inconsistencies on Mechanical Properties of Dual‐Phase Steel

Kong

Zhang

et al. 2018

steel research int.

Self Cite

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The chemical composition and microstructure of dual‐phase steels from different production lines are inconsistent due to different manufacturing processes. It is responsible for the mechanical properties differences and brings negative impacts on the applications of DP steel during deformation. In this study, the chemical compositions, martensite volume fraction, and ferrite grain average diameter are investigated by the tests with DP780 steels from different production lines. The finite element models are established based on the microstructures of DP780 steels. Different mechanical properties of DP780 steels with various chemical compositions and microstructures are investigated on the stress–strain relationship and elongation by means of finite element simulation. A novel method with the failure element ratio as an indicator is proposed to evaluate the elongation of DP780 steel based on the micro‐mechanism of tensile fracture. The quantitative effects are obtained separately in the forms of carbon content, martensite volume fraction, and ferrite grain average diameter on the mechanical properties of DP780 steel. It is suggested that the detailed chemical compositions and microstructures should be specified for the criterion of mechanical performance of DP steels.

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Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 82%

Section: Differences Of Chemical Compositions and Microstructures Formentioning

confidence: 99%

Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 99%

Section: Simulation Analysis For the Differences Of Mechanical Propermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Study on the Effects of Chemical Composition and Microstructure Inconsistencies on Mechanical Properties of Dual‐Phase Steel

Kong

Zhang

et al. 2018

steel research int.

Self Cite

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Comparative experimental and numerical study on the mechanical properties, formability, and microstructure of two high strength steel sheets

Basaeri

Khorsand

Eslami‐Farsani

et al. 2020

Int J Adv Manuf Technol

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Initiation and growth of edge cracks after shear cutting of dual-phase steel

Khalilabad

Perdahcioglu

Atzema

et al. 2023

Int J Adv Manuf Technol

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Dual-phase steels suffer from low edge ductility, which limits their formability. In this study, an in-plane bending test is used to investigate the initiation and evolution of edge cracks. The edges of samples were prepared by shear cutting and afterwards further deformed by the in-plane bending test. Void distribution and non-uniform plastic deformation were explored with the help of scanning electron microscope (SEM) and electron backscatter diffraction (EBSD) analysis and microhardness measurement in different regions of the material edge. The extent of micro-cracks was revealed by microcomputed tomography (µCT) scan. The result shows that the blanking process creates inhomogeneous void distribution in the thickness direction. As the deformation increases during the subsequent in-plane bending test, the micro-cracks initiate at the burr region and grow towards the rollover region. Once they entirely pass the thickness of the material, they grow further, away from the edge. High roughness, plastic deformation, and void volume fraction were observed at the burr region, triggering crack initiation. The in-plane bending test successfully distinguished the dominant mechanism behind edge cracking.

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Deep drawing and bulging forming limit of dual-phase steel under different mechanical properties

Cited by 13 publications

References 27 publications

Numerical Study on the Effects of Chemical Composition and Microstructure Inconsistencies on Mechanical Properties of Dual‐Phase Steel

Numerical Study on the Effects of Chemical Composition and Microstructure Inconsistencies on Mechanical Properties of Dual‐Phase Steel

Comparative experimental and numerical study on the mechanical properties, formability, and microstructure of two high strength steel sheets

Initiation and growth of edge cracks after shear cutting of dual-phase steel

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