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  A further step towards an understanding of size-dependent crystal plasticity: In situ tenison experiments of miniaturized single-crystal copper samples

Kiener, D., Grosinger, W., Dehm, G., & Pippan, R. (2008). A further step towards an understanding of size-dependent crystal plasticity: In situ tenison experiments of miniaturized single-crystal copper samples. Acta Materialia, 56(3), 580-592. doi:10.1016/j.actamat.2007.10.015.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-27DC-C Version Permalink: http://hdl.handle.net/21.11116/0000-0001-983E-F
Genre: Journal Article

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 Creators:
Kiener, Daniel1, 2, Author              
Grosinger, Wolfgang3, Author              
Dehm, Gerhard3, 4, Author              
Pippan, Reinhard5, Author              
Affiliations:
1Materials Center Leoben Forschungs GmbH, Leoben, Austria, ou_persistent22              
2Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Austria, ou_persistent22              
3Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria, ou_persistent22              
4Department of Materials Physics, Montanuniversität Leoben, Austria, ou_persistent22              
5Erich Schmid Institute of Materials Science, Austrian Academy of Sciences and Department Material Physics, Leoben, Austria, ou_persistent22              

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 Abstract: A method for in situ testing of miniaturized tension specimen was developed. The size effects of the plastic deformation behavior of copper single crystals loaded along the Æ234æ direction were investigated. The diameter was varied between 0.5 lm and 8 lm, and the aspect ratio, gauge length to side length, between 1:1 and 13.5:1. At high aspect ratios hardening was negligible. However, an increase of the flow stress with decreasing diameter was observed. This increase was small for diameters above 2 lm, and somewhat larger below 2 lm. These findings are explained by individual dislocation sources which govern the plastic deformation. For low aspect ratios the behavior is significantly different. A pronounced hardening and a very strong size effect was observed. Both are a result of dislocation pile-ups due to the constrained glide of the dislocations caused by the sample geometry.

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Language(s): eng - English
 Dates: 2008-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.actamat.2007.10.015
 Degree: -

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Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
 Creator(s):
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Publ. Info: Kidlington : Elsevier Science
Pages: 3 Volume / Issue: 56 (3) Sequence Number: - Start / End Page: 580 - 592 Identifier: ISSN: 1359-6454
CoNE: /journals/resource/954928603100