Influence of Strain Rate on the Activation of {110}, {112}, {123} Slip in Ferrite of a Dual Phase Steel

15 Pages Posted: 20 Dec 2019

See all articles by Chunhua Tian

Chunhua Tian

Max Planck Institute for Iron Research

Gerhard Dehm

Max Planck Institute for Iron Research

Christoph Kirchlechner

Max Planck Institute for Iron Research

Abstract

We have performed micro pillar compression to investigate the influence of strain rate on the activation of three slip plane families, namely {110}, {112} and {123}, in ferrite of a dual phase steel (DP800). The critical resolved shear stress of all slip plane families rises with an increased strain rate. The strain rate sensitivity drops with increasing strain. The increasing strain rate does not reduce the number of activated slip systems, however, results in a successive breakdown of Schmid's law. The activation volume of 13b³-16b³ suggest that the Peierl's process is the rate controlling mechanism in ferrite of DP800.

Keywords: slip plane families, strain rate sensitivity, Schmid´s law, Peierl's process

Suggested Citation

Tian, Chunhua and Dehm, Gerhard and Kirchlechner, Christoph, Influence of Strain Rate on the Activation of {110}, {112}, {123} Slip in Ferrite of a Dual Phase Steel. Available at SSRN: https://ssrn.com/abstract=3507458 or http://dx.doi.org/10.2139/ssrn.3507458

Chunhua Tian

Max Planck Institute for Iron Research

Max-Planck-Straße 1
Max Planck Strasse 1
40237 Düsseldorf, DE Nordrhein-Westfalen 40237
Germany

Gerhard Dehm

Max Planck Institute for Iron Research

Max-Planck-Straße 1
Max Planck Strasse 1
40237 Düsseldorf, DE Nordrhein-Westfalen 40237
Germany

Christoph Kirchlechner (Contact Author)

Max Planck Institute for Iron Research

Max-Planck-Straße 1
Max Planck Strasse 1
40237 Düsseldorf, DE Nordrhein-Westfalen 40237
Germany

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