Microstructural size effects on mechanical properties of high purity nickel

[en] The aim of this article is to provide experimental results in order to understand the microstructural size effects which occur with a decrease in the thickness of polycrystalline nickel samples from 3.2 mm to 12.5 lm. The influence of the thickness, grain size and ratio thickness to grain size on the mechanical properties and strain hardening were investigated by mechanical tests and TEM observations. The results show the presence of three different domains of mechanical behaviour: polycrystalline, multicrystalline and quasi-single crystalline depending on the thickness and on the number of grains across the thickness. The transition between the three domains is due to the occurrence of surface effects involving a decrease in the long-range internal backstress revealed by the TEM observations.

Disciplines :

Materials science & engineering

Author, co-author :

Keller, Clément ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F

Hug, E.

Feaugas, X.

Language :

English

Title :

Microstructural size effects on mechanical properties of high purity nickel

Publication date :

2011

Journal title :

International Journal of Plasticity

ISSN :

0749-6419

Publisher :

Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom

Volume :

Pages :

635–654

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://www.sciencedirect.com/journal/international-journal-of-plasticity

Available on ORBi :

since 14 December 2010

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Scopus citations^®

157

Scopus citations^®
without self-citations

136

OpenCitations

119

OpenAlex citations

160

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