This study demonstrates the effects of annealing temperatures on mechanical properties and phase transformations in Fe62Ni18P13C7 alloy, indicating its low glass-forming ability.
In this study, the influence of annealing on the phase evolution and mechanical properties of the Fe62Ni18P13C7 (at.%) alloy was investigated. Ribbons produced via melt-spinning were annealed at various temperatures, and their structural transformations and hardness were evaluated. The alloy exhibited a narrow supercooled liquid region (ΔTx ≈ 22 °C), confirming its low glass-forming ability (GFA). Primary crystallization began at approximately 380 °C with the formation of α-(Fe,Ni) and Fe2NiP, followed by the emergence of γ-(Fe,Ni) phase at higher temperatures. A significant increase in hardness was observed after annealing up to 415 °C, primarily due to nanocrystallization and phosphide precipitation. Further heating resulted in a hardness plateau, followed by a noticeable decline. Additionally, samples were produced via selective laser melting (SLM). The microstructure of the SLM-processed material revealed extensive cracking and the coexistence of phosphorus-rich regions corresponding to Fe2NiP and iron-rich regions associated with γ-(Fe,Ni).
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Małachowska et al. (2025) studied this question.
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