Formation and mechanical behavior of (Fe0.5Ni0.5)80−xMoxB20 (x=0–8) amorphous alloys

• Published in: Journal of non-crystalline solids Vol. 354; no. 15-16; pp. 1683 - 1689
• Main Authors: He, Z.Q., Wang, X.L., Zhao, Z.Y., Quan, B.Y.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.03.2008; Elsevier
• Subjects: Amorphous metals; Condensed matter: structure, mechanical and thermal properties; Deformation and plasticity (including yield, ductility, and superplasticity); Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Glass transitions; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Metallic glasses; Physics; Specific phase transitions; Metallic glasses; 62.20.F; 64.70.pe; Amorphous metals; 62.20.mm; 61.43.Dq; Differential scanning calorimetry; Scanning electron microscopy; Nickel alloys; Ductility; Tearing test; Crystallization; Tensile tests; Amorphous alloy; Iron alloys; XRD; Microhardness; Boron alloys; Tensile strength; Glass transition; Amorphous metals; Metallic glasses; Transmission electron microscopy; Plasticity; Chemical composition; 61.43.Dq; 62.20.F-; 62.20.mm; 64.70.pe; Molybdenum alloys; Transition element alloys
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2007.09.006

Glass forming ability, thermal stability and mechanical behavior of (Fe0.5Ni0.5)80−xMoxB20 (x=0, 2, 4, 6, 8) amorphous alloys were studied by XRD, TEM, SEM, DSC, tensile test, microhardness test and tearing test. The effects of Mo addition on glass formation, strength and ductility of (Fe0.5Ni0.5)80−xMoxB20 amorphous alloys were discussed. The substitution of Mo for Fe and Ni simultaneously causes improvement in glass forming ability and thermal stability, and changes the crystallization process. The tensile fracture strength of amorphous alloy depends on both hardness and ductility; the alloy with high hardness and good ductility simultaneously also has a high tensile fracture strength. The (Fe0.5Ni0.5)78Mo2B20 amorphous alloy exhibits good glass forming ability and the highest tensile fracture strength among (Fe0.5Ni0.5)80−xMoxB20 alloys. Micro-plastic deformation occurred in ductile and brittle amorphous alloys that both show viscous flow characteristics. The mechanical behavior of (Fe0.5Ni0.5)80−xMoxB20 amorphous alloys is related to the average outer shell electron concentration of metal atoms.