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  Ferrite slip system activation investigated by uniaxial micro-tensile tests and simulations

Du, C., Maresca, F., Geers, M. G. D., & Hoefnagels, J. P. (2018). Ferrite slip system activation investigated by uniaxial micro-tensile tests and simulations. Acta Materialia, 146, 314-327. doi:10.1016/j.actamat.2017.12.054.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E7EC-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E7ED-0
Genre: Journal Article

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 Creators:
Du, Chaowei1, 2, Author              
Maresca, F.3, 4, Author              
Geers, Marc G. D.5, Author              
Hoefnagels, Johan P.M.6, Author              
Affiliations:
1Nano-/ Micromechanics of Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863401              
2Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands, persistent22              
3Department of Mechanical Engineering, Eindhoven University of Technology (TU/e), P.O.Box 513, Eindhoven, The Netherlands, ou_persistent22              
4Institute of Mechanical Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, persistent22              
5Department of Mechanical Engineering, Mechanics of Materials, TU Eindhoven, The Netherlands, ou_persistent22              
6Eindhoven University of Technology, Dep. of Mech. Eng., P.O. Box 513, 5600MB Eindhoven, The Netherlands, ou_persistent22              

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Free keywords: Chemical activation; Crystal orientation; Ferrite; High strength steel; Plasticity; Shear stress; Single crystals; Tensile testing, Boundary constraints; Critical resolved shear stress; Crystal plasticity; Micro tensile testing; Micro tensile tests; Plastic behavior; Slip activity; Slip direction, Plasticity testing
 Abstract: Well-defined uniaxial micro-tensile tests are performed on single-crystal ferrite specimens with three different orientations. All specimens reveal a highly reproducible plastic behavior. The 110}lt;111gt; and {112}lt;111gt; slip systems equally contribute to the deformation, while all other (complex) slip traces can be identified as cross-slip and ‘pencil glide’. No {123}lt;111gt; slip system traces were observed. The critical resolved shear stresses of the two active slip systems are close to each other, i.e. CRSS{110}=(1.0±0.1)×CRSS{112. In all the tested specimens, the activation of the primary slip systems (e.g. systems that activate first) follows the Schmid's law. At first glance, the activation of secondary slip systems does not seem to comply with the highest Schmid factor. However, detailed investigation supported by crystal plasticity simulations reveals that the boundary constraints acting on the primary slip direction triggers an increase of the Schmid factors of the activated secondary slip systems, i.e. Schmid's law correctly justified all observed slip traces. Application of the found ferrite slip parameters in crystal plasticity simulations of ferrite-containing steels shows that correct input values are crucial for obtaining meaningful macroscopic predictions. © 2018 Acta Materialia Inc.

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Language(s): eng - English
 Dates: 2018-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.actamat.2017.12.054
BibTex Citekey: Du2018314
 Degree: -

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Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
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Publ. Info: Kidlington : Elsevier Science
Pages: - Volume / Issue: 146 Sequence Number: - Start / End Page: 314 - 327 Identifier: ISSN: 1359-6454
CoNE: https://pure.mpg.de/cone/journals/resource/954928603100