Elasto-Plastic Property of High Strength Steel at Warm Temperature and its Springback

Naoko Saito; Mitsugi Fukahori; Daisuke Hisano; Yuya Ichikawa; Hiroshi Hamasaki; Fusahito Yoshida

doi:10.4028/www.scientific.net/KEM.535-536.385

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 535-536Elasto-Plastic Property of High Strength Steel at...

Elasto-Plastic Property of High Strength Steel at Warm Temperature and its Springback

Abstract:

Stress-strain responses of a high strength steel sheet of 980MPa grade under uniaxial tension and its springback in V- and U-bending were investigated at elevated temperatures ranging from 573-973K. The flow stress decreased drastically with the increase of temperature, from which it was expected that springback is reduced by warm forming. In V-bending test, however, the temperature effect on springback was not so clear, while in U-bending springback decreased with temperature rise. It was found that such difference in temperature dependent springback behavior between V- and U-bending was caused by stress relaxation which took place during unloading process.

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Periodical:

Key Engineering Materials (Volumes 535-536)

Pages:

385-388

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.535-536.385

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Online since:

January 2013

Authors:

Naoko Saito, Mitsugi Fukahori, Daisuke Hisano, Yuya Ichikawa, Hiroshi Hamasaki, Fusahito Yoshida

Keywords:

High Strength Steel Sheet, Springback, Warm Forming

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