Abstract
Abstract
Highlights
Microalloying technology, i.e., usually alloying with,2 at.% alloying elements,[1] has traditionally been used as a metallurgical technique for developing new metallic crystalline materials with improved performance
The vast majority of the studies have been focused on studying the effect of adding one minor alloying element to tune the GFA and the mechanical properties of bulk metallic glass (BMG) and BMGs and composites (BMGC)
We summarize the effect of microalloying in the glass forming ability and mechanical properties of alloys that are very sensitive to minor additions with focus on our results
Summary
Microalloying technology, i.e., usually alloying with ,2 at.% alloying elements,[1] has traditionally been used as a metallurgical technique for developing new metallic crystalline materials with improved performance. Microalloying can have different effects on the melt, depending on the composition of the BMG and the nature of the elements added (rare earth element [ RE, transition metal [ TM, etc) They can change the density of states,[24] stabilize the liquid phase by approaching the composition closer to a deep eutectic,[25] impair the thermodynamic driving force for crystal precipitation by introducing an atomic-level strain energy into the liquid,[26] favor the formation of local crystal-like orders at the atomic scale[27] or scavenge oxygen from the melt.[5] Over the years, the vast majority of the studies have been focused on studying the effect of adding one minor alloying element to tune the GFA and the mechanical properties of BMGs and BMGCs. Only few studies have dealt with the effect that minor co-addition of various elements[28,29,30] has on the properties of these materials, despite the fact that the synergistic effect of minor element co-addition can result in compositions with very different properties as shown in this paper. This sensitivity is either because their glass forming ability is relatively low and a small composition change can lead to crystallization [i.e., for Mg–Ni–RE,[31] Mg–Zn–Ca,[32] and Al–Ni–Co–Y33 systems] or because the alloy system itself is very sensitive to minor additions (i.e., for Zr–Cu alloys).[25,34]
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