Article (Scientific journals)
Microstructural size effects on mechanical properties of high purity nickel
Keller, Clément; Hug, E.; Feaugas, X.
2011In International Journal of Plasticity, 27, p. 635–654
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Keywords :
Mechanical testing; Transmission electron microscopy (TEM); Dislocations; Strengthening mechanisms; Metallic materials
Abstract :
[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 :
27
Pages :
635–654
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 December 2010

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