Mechanistic transition from slip-driven to shear-band-controlled crack propagation induced by α-phase variation in multiscale TC18 alloy

Key Points

• Crack propagation shifts from slip-driven to shear-band-controlled mechanisms, enhancing material performance.
• The analysis reveals significant changes in crack behavior due to varying α-phase structures in multiscale TC18 alloy.
• Assessment using mechanical properties and microstructural analysis highlights the transition's complexity.
• Findings may enable improved designs and applications of alloys based on their crack propagation behavior.