Preliminary communication

Influence of the strain rate on the mechanical and technological properties of steel sheets

M. Buršák ; Faculty of Metallurgy, Technical University of Košice, Slovakia
J. Michel’ ; Faculty of Metallurgy, Technical University of Košice, Slovakia

Abstract

The paper analyses the influence of strain rate on the behaviour of un-alloyed steels with R_e (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 R_e/R_m is increased, whereas it was observed more intensively for steels with the lower value of R_e. By increasing of strain rate up to 1 s-1 are I_E values of tested steels increased, whereas the ratio R_e/R_m was equal 0,82. After exceeding of this strain rate was the ratio Re/Rm increased and I_E value is remarkable decreased.

Keywords

Plastic deformation; Erichsen number I_E; tensile tests

Hrčak ID:

57438

URI

https://hrcak.srce.hr/57438

Publication date:

1.10.2010.

Article data in other languages: croatian

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