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  On the nature of twin boundary-associated strengthening in Fe–Mn–C steel

Choi, W. S., Sandlöbes, S., Malyar, N., Kirchlechner, C., Korte-Kerzel, S., Dehm, G., et al. (2018). On the nature of twin boundary-associated strengthening in Fe–Mn–C steel. Scripta Materialia, 156, 27-31. doi:10.1016/j.scriptamat.2018.07.009.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-E683-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0001-E685-5
Genre: Journal Article

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 Creators:
Choi, Won Seok1, 2, Author           
Sandlöbes, Stefanie1, 3, Author           
Malyar, Nataliya4, Author           
Kirchlechner, Christoph4, Author           
Korte-Kerzel, Sandra5, Author           
Dehm, Gerhard6, Author           
Choi, Pyuck-Pa7, Author           
Raabe, Dierk1, Author           
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
2Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea, persistent22              
3Institute of Physical Metallurgy and Metal Physics, RWTH Aachen University, 52056 Aachen, Germany, ou_persistent22              
4Nano-/ Micromechanics of Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863401              
5Institut für Metallkunde und Metallphysik, RWTH Aachen University, Aachen 52074, Germany, ou_persistent22              
6Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863398              
7Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea, ou_persistent22              

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Free keywords: Compression testing; Deformation; Iron alloys; Plasticity; Strain hardening; Strengthening (metal); Twinning, Deformation mechanism; Deformation twinning; Dislocation interaction; Local stress-strain; Micro-pillar compressions; Orientation dependent; Twinning induced plasticity steels; TWIP steel, Manganese alloys
 Abstract: We unravel the nature of twin boundary-associated strengthening in Fe-Mn-C twinning-induced plasticity steel (TWIPs) by micro-pillar compression tests. Dislocation interactions with a coherent twin boundary and their role on strain hardening were investigated. The results indicate that twin-matrix bundles dynamically introduced by deformation twinning and their interaction with dislocations are required for strengthening Fe-Mn-C TWIPs, while single coherent twin boundaries enable dislocation transmission. Correlative studies on orientation dependent deformation mechanisms, detailed dislocation-twin boundary interactions, and the resulting local stress-strain responses suggest that twin boundary-associated strengthening is primarily caused by the reduction of the mean free dislocation path in nano-twinned microstructures. © 2018

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Language(s): eng - English
 Dates: 2018-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.scriptamat.2018.07.009
BibTex Citekey: Choi201827
 Degree: -

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Title: Scripta Materialia
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B. V.
Pages: - Volume / Issue: 156 Sequence Number: - Start / End Page: 27 - 31 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506