Y.H. Li, S.W. Wang, X.W. Wang, M.L. Yin, W. Zhang. Journal of Materials Science & Technology, 2020, 43:32-39.

Abstract:

New Fe_20–35Ni₂₀Cr_20–30Mo_5–15(P_0.6C_0.2B_0.2)₂₀ bulk metallic glasses with excellent thermal stability, strength, and corrosion resistance have been developed through the high-entropy alloy design strategy. The high-entropy bulk metallic glasses (HE-BMGs) possess larger supercooled liquid regions of ∼69 K, higher crystallization onset temperatures of ∼852 K, larger undercoolings of ∼109 K, and more sluggish crystallization process upon heating than the conventional metallic glass benefited from the high mixing entropy effect. The HE-BMGs also exhibit ultrahigh strength of ∼3.4 GPa, Vickers hardness of ∼1107, and superior corrosion resistance in acids and NaCl solutions by formation of highly stable Cr- and Mo-enriched passive films. The new metal-metalloid HE-BMG system and exceptional properties give the alloys good promise for both scientific and engineering applications.

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