Mechanical and magnetic properties of Cu55Hf45−xTix metallic glasses

A recent study of Cu55Hf45−xTix metallic glasses with 0≤x≤450≤x≤45 has revealed the formation of bulk metallic glasses (BMG) for 15≤x≤3015≤x≤30. In the same composition range, the ratio of the glass transition temperature TgTg, and the liquidus temperature TlTl, showed a shallow maximum, consistent with the highest glass forming ability (GFA). Here, we present the results for some mechanical properties (Young’s modulus and microhardness) and magnetic properties (magnetic susceptibility) of these alloys and compare their variation with xx with those for TgTg and the crystallization temperature TxTx. All measured properties show monotonic variations with xx with no particular features in the composition range for BMG formation, hence do not indicate BMG compositions. The applicability of different criteria for assessing GFA to studied alloy system is briefly discussed.

► Correlation between magnetic and mechanical properties of CuHfTi glassy alloys. ► Simple scaling between stiffness and glass transition is revealed. ► Best indicator for assessing glass forming ability is selected.