Structure and High-Temperature Mechanical Properties of High-Carbon Niobium-Based Alloys

Abstract

Abstract—The structure and the mechanical properties of Nb₈₀C₂₀ and Nb₄₀Mo₄₀C₂₀ alloys have been studied at temperatures 20–1500°C. The mechanical properties of the Nb₈₀C₂₀ alloy from room temperature to 1300°C are shown to be slightly lower than those of complex Nb–Si alloys. The short-time and 100-h strengths of the Nb₄₀Mo₄₀C₂₀ alloy at 1500°C are higher than those of Nb–Si alloys. The Nb₄₀Mo₄₀C₂₀ alloys have a low fracture toughness.