Reference : Microstructural size effects on mechanical properties of high purity nickel
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/79393
Microstructural size effects on mechanical properties of high purity nickel
English
Keller, Clément mailto [Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F >]
Hug, E. [> >]
Feaugas, X. [> >]
2011
International Journal of Plasticity
Pergamon Press - An Imprint of Elsevier Science
27
635–654
Yes (verified by ORBi)
International
0749-6419
Oxford
United Kingdom
[en] Mechanical testing ; Transmission electron microscopy (TEM) ; Dislocations ; Strengthening mechanisms ; Metallic materials
[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.
http://hdl.handle.net/2268/79393
10.1016/j.ijplas.2010.08.002
journal homepage: www.elsevier.com/locate/ijpla
© 2010 Elsevier Ltd. All rights reserved.

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