“…In most cases, however, the activation energy is considered to be a material constant (so-called apparent activation energy) or, at most, strain dependent [21,26,[51][52][53][54]. In order to deal with the activation energy as a strain, strain rate, and temperature dependent parameter, the method utilized, e.g., in [55,56] has been employed. Similarly, as in the case of the apparent activation energy, the calculation is based on the well-known Garofalo's relationship [57].…”