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Micromechanical Tension Testing of Additively Manufactured 17-4 PH Stainless Steel Specimens
Published on: April 7, 2021
Electroplastic Effect during Tension and Bending in Duplex Stainless Steel
Mikhail Pakhomov1, Oleg Korolkov1, Mirko Pigato2
1Mechanical Engineering Research Institute of RAS, 101990 Moscow, Russia.
Abstract:
The deformation behavior of duplex stainless steel under tension and bending, accompanied by a pulsed current and when heated by an external source, is investigated. The stress-strain curves are compared at the same temperatures. The contribution to the decrease in flow stresses is greater when using a multi-pulse current at the same temperature, compared to external heating. This confirms the presence of an electroplastic effect. An increase in the strain rate by an order of magnitude reduces the contribution of the electroplastic effect from single pulses to the reduction in flow stresses by 20%. An increase in the strain rate by an order of magnitude reduces the contribution of the electroplastic effect from single pulses to the reduction in flow stresses by 20%. However, in the case of a multi-pulse current, the strain rate effect is not observed. Introducing a multi-pulse current during bending reduces the bending strength by a factor of two and the springback angle to 6.5.
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