Hetero-deformation mechanisms and GND-associated plastic strain partitioning across single/polycrystal hetero-boundary in nickel-based superalloys

Key Points

• Plastic strain partitioning occurs differently at single and polycrystal hetero-boundaries in nickel-based superalloys, affecting material performance.
• The study demonstrates that hetero-deformation mechanisms significantly influence the distribution of plastic strain across grain boundaries.
• Assessment using experimental observation and simulation shows that geometrically necessary dislocations play a critical role in the deformation process.
• Highlights the need for further research on strain behavior at different boundary types to optimize superalloy performance.