Temperature-dependent modulus of resilience in metallic solids - Calculated from strain-electron-phonon interactions

Modulus of resilience (R) in metallic solids is calculated based on Helmholtz energy analysis, free electron gas and acoustic phonon approximations: R = C + 2200(-1)(T-T-D) + 2200(-2)(T-T-C)(2), where T, TD, Tc is respectively the test, Debye, and Curie temperature, C is a material-specific constant. The model reproduces well experimental data in commercial titanium-, copper-, and four steels solids, and evaluates HfB2 where experimental data are missing. It further suggests that only similar to 0.1% of all the thermal free electrons/acoustic phonons are mechanically activated during the tensile test, which provides important insights on strain-electron-phonon coupling in solids. (C) 2017 Elsevier B. V. All rights reserved.