Metallurgy, Vol. 54 No. 4, 2015.
Original scientific paper
The effect of strain rate on the impact strength of the high-Mn steel
A. Śmiglewicz
; Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland
M. B. Jabłońska
; Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland
Abstract
In the paper, results of impact bending tests of a high-manganese steel of Fe – 30 wt.%, Mn – 9 wt.%, Al – 0,65 wt.%, C grade are presented. The tests were carried out using a flywheel machine, suitable for dynamic stretching and impact bending tests in the range of linear velocity of the forcing element from 5 ÷ 40 m/s. The obtained test results were compared with the results of impact resistance of the studied steel determined using Charpy machine. Structural investigations were carried out using scanning transmission electron microscopy. Surfaces of fractures formed in the break point during bending tests were analyzed, and they indicate a presence of mixed transcrystalline fractures with a predominance of plastic fractures.
Keywords
high manganese steels; Charpy impact test; impact bending; high deformation rate
Hrčak ID:
138273
URI
Publication date:
1.10.2015.
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