Abstract
Novel high-entropy (multi-principal elements) alloy based on Fe-Al-Si-Ni-Ti in equimolar proportions has been developed. The alloy powder obtained by mechanical alloying is composed of orthorhombic FeTiSi phase with the admixture of B2 FeAl. During spark plasma sintering of this powder, the FeSi phase is formed and the amount of FeAl phase increases at the expense of the FeTiSi phase. The material is characterized by a high compressive strength (approx. 1500 MPa) at room temperature, being brittle. At 800 °C, the alloy is plastically deformable, having a yield strength of 459 MPa. The wear resistance of the material is very good, comparable to the tool steel. During the wear test, the spallation of the FeSi particles from the wear track was observed locally.
Highlights
IntroductionAcademic Editors: Jian-Zhong Jiang and Joseph Poon
The Fe-Al-Si-Ni-Ti high-entropy alloy was successfully prepared by the combination of mechanical alloying and spark plasma sintering
While the mechanically alloyed powder was composed mostly of the orthorhombic FeTiSi phase with a minor amount of a B2 FeAl phase, the sintering caused the increase of the content of FeAl phase, as well as the formation of fine particles of FeSi
Summary
Academic Editors: Jian-Zhong Jiang and Joseph Poon. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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