Universal power-law strengthening in metals?

作者：Derlet P M^*; Maass R

来源：Scripta Materialia, 2015, 109: 19-22.

DOI：10.1016/j.scriptamat.2015.07.009

• Plasticity
• Strength
• Intermittent flow
• Sample size effects
• Modelling

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.

• 出版日期2015-12