Temperature- and internal structural size-dependent strength of nanotwinned face-centered cubic metals

The Nanotwin structure exhibits great potential as a strengthening medium, with its effectiveness influenced by both internal structural size and temperature. In this work, we developed a strength model that incorporates the dependence on temperature and internal structural size. This model can predict the strength of nanotwinned (NT) FCC metals with intracrystalline or intercrystalline twin boundaries featuring different internal structural sizes at varying temperatures at the inverse Hall-Petch stage. The proposed prediction model has significant importance for enhancing our understanding of the mechanical behavior exhibited by NT metals and facilitating the design of super-strong materials that can withstand extreme conditions.