Stress Relaxation for Formability Improvement

Krishnaswamy Hariharan; Omid Majidi; Chong Min Kim; Myoung Gyu Lee; Frédéric Barlat

doi:10.4028/www.scientific.net/KEM.554-557.145

Paper Titles

Ductile Damage in Tension and Bending for DP980 Steel Sheets
p.110

On the Influence of Cold Rolling Parameters for 14CrW-ODS Ferritic Steel Claddings
p.118

A Theoretical Study of the Effect of the Double Strain Path Change on the Forming Limits of Metal Sheet
p.127

Material Modeling of High Strength Steel Sheet Using Multiaxial Tube Expansion Test with Optical Strain Measurement System
p.139

Stress Relaxation for Formability Improvement
p.145

Effect of Material Model on Finite Element Modeling of Aerospace Alloys
p.151

Submicrocristalline Structure and Dynamic Recovery of Cold Flowformed ELI Grade Ti-6Al-4V
p.157

Prediction of Surface Roughening and Necking Behavior for Metal Foils by Inhomogeneous FE Material Modeling
p.169

Design of an Experimental Device for Biaxial Tension Tests Used in a Uniaxial Test Machine
p.174

HomeKey Engineering MaterialsKey Engineering Materials Vols. 554-557Stress Relaxation for Formability Improvement

Stress Relaxation for Formability Improvement

Abstract:

Improved formability has been reported due to stress relaxation when the continuous forming cycle is interrupted with steps by adjusting the punch motion. The contribution of stress relaxation and its parameters on the ductility of materials has not been established so far. In the present work, the stress relaxation behavior of three materials, low carbon steel, DP and TRIP steels are studied. The influence of strain rate and strain on the ductility enhancement due to stress relaxation is analyzed. It is observed that stress relaxation improved the ductility of materials in all the cases and therefore can be used as a potential method to improve formability in sheet metal forming.

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Periodical:

Key Engineering Materials (Volumes 554-557)

Pages:

145-150

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.554-557.145

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Online since:

June 2013

Authors:

Krishnaswamy Hariharan, Omid Majidi, Chong Min Kim, Myoung Gyu Lee, Frédéric Barlat

Keywords:

DP Steel, Formability, Stress Relaxation, Tensile Test, TRIP Steel

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