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Stretch Bendability of Advanced High Strength Steels
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<div class="htmlview paragraph">Bending under tension is an important deformation mode during stamping and has been observed to limit achievable ductility for high strength steels. This paper presents experimental results from Angular Stretch Bend (ASB) testing, which has been used to characterize bending under tension behavior for several conventional, advanced high strength steels and ultra-high strength steels. Steels that were studied include Bake Hardenable steels, High Strength Low Alloy (HSLA) steels, Dual Phase (DP) steels, Transformation Induced Plasticity (TRIP) steels, and tempered martensitic steels. Failure heights were determined under sample lockout conditions for different punch radii. By comparing absolute formability measured by the failure height, the results can be used to provide material formability ranking for different R/t ratios. In addition, strain distributions were analyzed to provide bending under tension forming limits for the different steel grades. This information will be useful in the development of die design and processing strategies for high strength sheet steels.</div>
Title: Stretch Bendability of Advanced High Strength Steels
Description:
<div class="htmlview paragraph">Bending under tension is an important deformation mode during stamping and has been observed to limit achievable ductility for high strength steels.
This paper presents experimental results from Angular Stretch Bend (ASB) testing, which has been used to characterize bending under tension behavior for several conventional, advanced high strength steels and ultra-high strength steels.
Steels that were studied include Bake Hardenable steels, High Strength Low Alloy (HSLA) steels, Dual Phase (DP) steels, Transformation Induced Plasticity (TRIP) steels, and tempered martensitic steels.
Failure heights were determined under sample lockout conditions for different punch radii.
By comparing absolute formability measured by the failure height, the results can be used to provide material formability ranking for different R/t ratios.
In addition, strain distributions were analyzed to provide bending under tension forming limits for the different steel grades.
This information will be useful in the development of die design and processing strategies for high strength sheet steels.
</div>.
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