Influence of the strain rate on the mechanical and technological properties of steel sheetsReport as inadecuate




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Metallurgy, Vol.49 No.4 October 2010. -

The paper analyses the influence of strain rate on the behaviour of un-alloyed steels with Re yield strength in the range of 210 … 550 MPa in the deformation process. It analyses the results of the influence of strain rate ranging from 10-3 to 2,5•102s-1 on the yield strength, the ultimate tensile strength Rm, the elongation A and the reduction of area Z. Achieved results of strain rate in relationship on values of Erichsen number IE are also given. By increasing of strain rate ranging from 10-3 to 2,5•102s-1 the ratio Re-Rm is increased, whereas it was observed more intensively for steels with the lower value of Re. By increasing of strain rate up to 1 s-1 are IE values of tested steels increased, whereas the ratio Re-Rm was equal 0,82. After exceeding of this strain rate was the ratio Re-Rm increased and IE value is remarkable decreased.

Plastic deformation; Erichsen number IE; tensile tests



Author: M. Buršák - ; Faculty of Metallurgy, Technical University of Košice, Slovakia J. Michel’ - ; Faculty of Metallurgy, Technica

Source: http://hrcak.srce.hr/



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