Bending properties of functionally graded 300M steels

Roumina, R.; Bruhis, M.; Masse, Jean-Philippe; Zurob, Hatem S.; Jain, M.; Bouaziz, Olivier; Embury, J.D.

doi:10.1016/j.msea.2015.12.012

Cited by 15 publications

(6 citation statements)

References 14 publications

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“…On the other hand, it has recently been reported that decarburization significantly improves bendability. [16][17][18] However, concerning hot stamped parts, there are no reports on details of decarburization behavior and the relationship between bendability and thickness of the decarburized layer. In addition, no report was found regarding the effect of decarburization on the delayed fracture susceptibility of martensitic steel.…”

Section: Decarburizing Behavior and Its Effect On Mechanical Properties Of Ultrahigh Strength Steel Sheetsmentioning

confidence: 99%

Decarburizing Behavior and Its Effect on Mechanical Properties of Ultrahigh Strength Steel Sheets

et al. 2021

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Section: Decarburizing Behavior and Its Effect On Mechanical Properties Of Ultrahigh Strength Steel Sheetsmentioning

confidence: 99%

Decarburizing Behavior and Its Effect on Mechanical Properties of Ultrahigh Strength Steel Sheets

et al. 2021

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“…During the bending process, the stress values in the thickness direction changed from "zero" at the center plane, to maximum at the inner and outer surface (indicated by red arrows in Figure 10a). However, during the bending process of the specimens, the middle surface is moved to the inner zone due to the radial force [23,24,35]. After the movement of middle surface, the stress distribution along the thickness changed, as suggested by the blue arrows in Figure 10a.…”

Section: Strain Heterogeneity and Transformation Of Retained Austenitmentioning

confidence: 99%

“…Metals 2018, 8, x FOR PEER REVIEW 10 of 13 zone due to the radial force [23,24,35]. After the movement of middle surface, the stress distribution along the thickness changed, as suggested by the blue arrows in Figure 10a.…”

Section: Strain Heterogeneity and Transformation Of Retained Austenitmentioning

confidence: 99%

The Impact of Strain Heterogeneity and Transformation of Metastable Austenite on Springback Behavior in Quenching and Partitioning Steel

Liu

et al. 2018

Metals

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Multiple strengthening methods, such as high dislocation density, high twin density, small grain size, and metastable austenite phase can give high strength to ultra-high strength steels (UHSSs). However, the high strength of UHSSs often results in a greater tendency for springback when applied in manufacturing vehicle components. In the present study, two types of UHSSs, dual-phase (DP) steel and quenching and partitioning (QP) steel are investigated to study the springback behavior during the bending process. Results indicated that both the strain heterogeneity and the transformation of retained austenite impacted the springback behavior. The springback angle of the DP steel increased with the increase in bending angle, which was caused by the increasing degree of strain heterogeneity. However, the springback angle of the QP steel decreased to a 14.75 • when QP specimens were strained at a 104 • bending angle due to the inhibiting effect of the phase transformation. This indicated that there was preferential phase transformation in the thickness direction in the retained austenite of the outer and inner zones. The phase transformation caused low strain heterogeneity, which resulted in a lower tendency for springback. The results suggested that QP steel could possess lower springback at a proper bending angle.

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“…Roumina et. al [11], by testing the bendability of a compositionally-graded martensitic steel, showed that introducing more ductile phase at the surface area can improve the bending properties thanks to suppression of cracks propagation. However, it has been found [8,[12][13][14] that during deformation and mechanical deformation, transformation of retained austenite to the martensite, especially large austenite islands which are less stable due to lower content of carbon compared to the small islands, can influence the initiation of voids and subsequent microcracks formation.…”

Section: Introductionmentioning

confidence: 99%

Promising bending properties of a new as-rolled medium-carbon steel achieved with furnace-cooled bainitic microstructures

Javaheri

Pallaspuro

Kaijalainen

et al. 2020

Materials Science and Engineering: A

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Bending properties of functionally graded 300M steels

Cited by 15 publications

References 14 publications

Decarburizing Behavior and Its Effect on Mechanical Properties of Ultrahigh Strength Steel Sheets

Decarburizing Behavior and Its Effect on Mechanical Properties of Ultrahigh Strength Steel Sheets

The Impact of Strain Heterogeneity and Transformation of Metastable Austenite on Springback Behavior in Quenching and Partitioning Steel

Promising bending properties of a new as-rolled medium-carbon steel achieved with furnace-cooled bainitic microstructures

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