Promotion or Suppression of Eutectic and Peri-Eutectic Growth in Containerlessly Processed Fe–Ni–Ti Alloys

The competitive growth mechanisms of ternary eutectic and peri-eutectic transitions liquid Fe–Ni–Ti alloys were investigated by drop tube technique. As undercooling cooling rate increased, the microstructure Ni40.6Fe36.4Ti23 alloy transformed from mixture primary Ni3Ti phase into complete eutectic. predominant mode independently grown Fe2Ti intermetallic varied nonfaceted to faceted growth, while γ-Fe(Ni) phases kept cooperative formed a lamellar structure owing coherent interface along $$(1 \overline{1}1)_{\gamma }$$ $$(0001)_{{{\text{Ni}}_{{\text{3}}} {\text{Ti}}}} $$ . transformation in Fe66.5Ni17.6Ti15.9 was suppressed due preferential α′-Fe as droplet size decreased. A needle-like precipitated supersaturated during rapid solidification, α-Fe/Fe2Ti characterized semicoherent. wear friction coefficient firstly increased then decreased controlled combined factors microstructural transition grain refinement. For alloy, refinement significantly improved performance after solidification. Moreover, had better resistance than ascribed hardening refined microstructure.