Title of article :
Mechanism of Springback-Free Bending of High-Strength Steel Sheets under Warm Forming Conditions
Author/Authors :
Yanagimoto، نويسنده , , J. and Oyamada، نويسنده , , K.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
4
From page :
265
To page :
268
Abstract :
Tensile loading-unloading tests of high-strength steel sheets in an elevated temperature range are conducted using a 100 kN servo-controlled hydraulic dynamic fatigue testing machine, aiming at clarifying the mechanism of the springback-free phenomenon occurring in warm sheet forming. From stress-strain curves obtained by the tests, it is found that the abrupt decrease in the springback of formed steel sheets at approximately 750 K in isothermal v-bending tests is mainly caused by high-temperature transient creep deformation. Also, from the results obtained by the isothermal v-bending test, bending-unbending deformation observed at temperatures higher than 750 K, as a result of high-temperature creep, was found to have a secondary effect in the springback-free phenomenon.
Keywords :
sheet metal , Springback , Warm sheet forming
Journal title :
CIRP Annals - Manufacturing Technology
Serial Year :
2007
Journal title :
CIRP Annals - Manufacturing Technology
Record number :
2267756
Link To Document :
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