Optimal Parameters to Obtain Ultra–High-Strength Fe-Based Amorphous Alloy Wires

Abstract

This article presents a detailed study of the optimal parameters for obtaining ultra–high-strength Fe_78−xCr_xSi₁₀B₁₂and Fe_77.5−xCr_xSi_7.5B₁₅amorphous alloy wires by using a melt spinning technique: “rotating water bath melt spinning process.” Ductile and continuous wires with roundness of about 100% were obtained from the combination of a number of casting conditions, which depend on alloy composition, nozzle orifice, nozzle/water distance tip, melt superheat, melt jet velocity, and drum/water velocity. The tensile strength of some alloy wires achieved 3.5 GPa. This high strength is attributed to the strong interaction between transition metals and metalloids and is enhanced when a second transition element is added; in this case, Cr.

Keywords:

• Rapid solidification
• Amorphous alloy wires
• Rotating water bath melt spinning process
• Ultra–high-strength wires

Acknowledgments

J.V. would like to acknowledge the financial support in the form of a studentship received from CONACYT, México. He also thanks the University of Sheffield for their support in the experimental work and we also thank the Universidad Michoacana de San Nicolás de Hidalgo for their facilities.