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- W4366818905 abstract "To improve the stretch flange deformation limit of ultrahigh-strength steels, a partial edge heating method was investigated. The effect of the strain gradient on the stretch flange deformation limit when a partial edge heating method was applied was investigated by the hole expansion test and FEM analysis. The stretch flange formability was improved by application of a partial edge heating method because of the recovery of the shearing microstructure and the reduction of the hardness difference of microstructure. It was found that the improvement of the deformation limit strain for the strain gradient with edge heating depends on the strain gradient region. In the low strain gradient region, the improvement margin of the deformation limit strain with edge heating was small. On the other hand, in the high strain gradient region, the deformation limit strain was markedly improved compared with that without heating. It was confirmed that the strain gradient in the direction perpendicular to the maximum principal strain could be used for the prediction of the deformation limit and also the determination of the stretch flange fracture by the FEM analysis of actual parts even under edge heating conditions." @default.
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- W4366818905 date "2023-05-01" @default.
- W4366818905 modified "2023-10-03" @default.
- W4366818905 title "Effects of Edge Heating and Strain Gradient on Stretch Flange Deformation Limit of Steel Sheet" @default.
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- W4366818905 doi "https://doi.org/10.2320/matertrans.mt-p2022006" @default.
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