  Experimental data on the compressive strength $\sigma_{\rm max}$ versus
strain rate ${\dot \varepsilon}_{\rm eng}$ for metallic glasses undergoing
uniaxial compression shows significantly different behavior for different
alloys. For some metallic glasses, $\sigma_{\rm max}$ decreases with increasing
${\dot \varepsilon}_{\rm eng}$, for others, $\sigma_{\rm max}$ increases with
increasing ${\dot \varepsilon}_{\rm eng}$, and for others $\sigma_{\rm max}$
versus ${\dot \varepsilon}_{\rm eng}$ is nonmonotonic. Using numerical
simulations of metallic glasses undergoing uniaxial compression at nonzero
strain rate and temperature, we show that they obey a universal relation for
the compressive strength versus temperature, which determines their mechanical
response. At low ${\dot \varepsilon}_{\rm eng}$, increasing strain rate leads
to increases in temperature and decreases in $\sigma^*_{\rm max}$, whereas at
high ${\dot \varepsilon}_{\rm eng}$, increasing strain rate leads to decreases
in temperature and increases in $\sigma^*_{\rm max}$. This non-monotonic
behavior of $\sigma^*_{\rm max}$ versus temperature causes the nonmonotonic
behavior of $\sigma^*_{\rm max}$ versus ${\dot \varepsilon}_{\rm eng}$.
Variations in the internal dissipation change the characteristic strain rate at
which the nonmonotonic behavior occurs. These results are general for a wide
range of metallic glasses with different atomic interactions, damping
coefficients, and chemical compositions.
