Microstructure evolution and failure mechanism of SP2215/Stellite-6 components prepared by laser directed energy deposition during high-temperature service

Key Points

• Components showed significant microstructure changes under high-temperature service, influencing their failure behavior.
• Microstructure analysis revealed that the transition in phase structure directly correlates with mechanical properties.
• Assessment using laser directed energy deposition documented the evolution of microstructural features and subsequent failures during tests.
• Highlights the need for improved understanding of laser deposition in high-temperature applications to enhance material performance.