Assessing size effects on the deformation of nanovoids in metallic materials. (1st March 2020)

• Record Type: Journal Article
• Authors: Hure, J.; Barrioz, P.O.; Tanguy, B.
• Is Part Of: Scripta materialia. Number 177(2020)
• Page Start: 54
• Page End: 57
• Publication Date: 2020-03-01
• Subjects: Porous material -- Transmission electron microscopy -- Dislocation -- Size effects; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.09.005
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: An experimental methodology is developed to evaluate size effects in nanovoids deformation under macroscopic uniaxial stress loading conditions. Quantitative evaluation of voids deformation as a function of voids size shows both a crystallographic effect, albeit small compared to the scatter, and no evidence of size effects for voids diameter larger than 10 nm, while a slight effect is present for smaller voids. Critical assessment of the data in light of theoretical models indicates that these results may be compatible with the presence of a hardened layer at the void/matrix interface, which is illustrated through finite element simulations accounting for surface tension.