Universal power-law strengthening in metals?. (December 2015)

• Record Type: Journal Article
• Authors: Derlet, P.M.; Maaß, R.
• Is Part Of: Scripta materialia. Volume 109(2015)
• Page Start: 19
• Page End: 22
• Publication Date: 2015-12
• Subjects: Plasticity -- Strength -- Intermittent flow -- Sample size effects -- Modelling; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.07.009
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: The strength of most metals scales with either an internal or external length scale. Motivated by the wide applicability of this phenomenon to material type and microstructure, we develop a model which gives quantitative insight into the scaling exponent using the known universal properties of a dislocation network and the leading order stress dependence of an underlying critical stress distribution. The approach is found to be equally valid for both Hall–Petch strengthening and the smaller-is-stronger paradigm of small scale plasticity.