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  Retardation of plastic instability via damage-enabled microstrain delocalization

Hoefnagels, J. P., Tasan, C. C., Maresca, F., Peters, F. J., & Kouznetsova, V. G. (2015). Retardation of plastic instability via damage-enabled microstrain delocalization. Journal of Materials Science, 50(21), 6882-6897. doi:10.1007/s10853-015-9164-0.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-5EFD-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-5EFE-0
Genre: Journal Article

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 Creators:
Hoefnagels, Johan P.M.1, Author              
Tasan, Cemal Cem2, Author              
Maresca, F.3, 4, Author              
Peters, Fayola J.3, Author              
Kouznetsova, Varvara G.3, Author              
Affiliations:
1Eindhoven University of Technology, Dep. of Mech. Eng., P.O. Box 513, 5600MB Eindhoven, The Netherlands, ou_persistent22              
2Adaptive Structural Materials (Experiment), Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863382              
3Department of Mechanical Engineering, Eindhoven University of Technology (TU/e), P.O.Box 513, Eindhoven, The Netherlands, ou_persistent22              
4Materials Innovation Institute (M2i), P.O.Box 5008, Delft, The Netherlands, ou_persistent22              

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Free keywords: Cracks; Ferrite; Finite element method; Martensite; Martensitic steel; Microstructure; Polypropylenes; Scanning electron microscopy; Strain
 Abstract: Multi-phase microstructures with high mechanical contrast phases are prone to microscopic damage mechanisms. For ferrite-martensite dual-phase steel, for example, damage mechanisms such as martensite cracking or martensite-ferrite decohesion are activated with deformation, and discussed often in literature in relation to their detrimental role in triggering early failure in specific dual-phase steel grades. However, both the micromechanical processes involved and their direct influence on the macroscopic behavior are quite complex, and a deeper understanding thereof requires systematic analyses. To this end, an experimental-theoretical approach is employed here, focusing on three model dual-phase steel microstructures each deformed in three different strain paths. The micromechanical role of the observed damage mechanisms is investigated in detail by in-situ scanning electron microscopy tests, quantitative damage analyses, and finite element simulations. The comparative analysis reveals the unforeseen conclusion that damage nucleation may have a beneficial mechanical effect in ideally designed dual-phase steel microstructures (with effective crack-arrest mechanisms) through microscopic strain delocalization.

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Language(s): eng - English
 Dates: 2015-07-29
 Publication Status: Published in print
 Pages: 16
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000359811300003
DOI: 10.1007/s10853-015-9164-0
 Degree: -

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Title: Journal of Materials Science
  Abbreviation : JMS
Source Genre: Journal
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Publ. Info: New York, NY, USA : Springer
Pages: - Volume / Issue: 50 (21) Sequence Number: - Start / End Page: 6882 - 6897 Identifier: ISSN: 0022-2461
CoNE: /journals/resource/954925415936_1