Nanoindentation study and mechanical property analysis of nickel-based single crystal superalloys

Abstract

Based on uniaxial tensile and compressive creeps, the mechanical properties of the third generation nickel-based single crystal superalloy were studied via the combination of nanoindentation, crystal plasticity theory, and finite element analysis. The Young’s moduli and hardness of γ , γ ′ and the topologically close-packed (TCP) phases are related to chemical composition and applied stress. The maximum values of the Von Mises equivalent stress and damage are at the tip of the TCP phase. These values are inversely proportional to the distance to the TCP phase. Furthermore, the rafting of the γ ′ phase can be predicted according to the distribution of the TCP phase and stress.

Keywords

• nanoindentation
• TCP phase
• young’s modulus
• hardness
• finite element analysis