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WRT2025.26

WRT2025.28

Зварювання та споріднені технології для відновлення України: Тези допов. конф. під ред. О.Т. Зельніченка. Київ, ТОВ «Видавничий Дім «Патон», 2025, с. 104-104

Restoration of XM-25 turbine blades via ded laser cladding: microstructural evolution and mechanical performance

An Tiancheng, Olena Berdnikova

ІЕЗ ім. Є.О. Патона НАН України. 03150, м. Київ, вул Казимира Малевича, 11.

High-strength martensitic precipitation-hardened stainless steel XM-25, widely used in low-pressure steam turbine blades, faces severe surface wear and water erosion during service. This study presents the restoration of large XM-25 blades via Directed Energy Deposition (DED) laser cladding using parent material powder, followed by aging treatment at 480 °C for 4 hours. The cladding process parameters were optimized to achieve defect-free metallurgical bonding. Comprehensive characterization, including non-destructive testing (PT, RT), microstructural analysis (OM, SEM, EDS, XRD), microhardness measurement, tensile testing, and high-cycle fatigue testing (R = 0.1), was conducted to evaluate the repaired blades. Results show that the cladded layers exhibit refined martensitic structures with uniformly dispersed precipitation-strengthening phases, microhardness up to 400 HV0.2, tensile strength exceeding 1200 MPa, and yield strength above 1050 MPa. Residual stress in the cladding area is approximately 30 % of the base material, and the fatigue limit reaches 95 % of the substrate, indicating excellent mechanical performance. The study demonstrates that DED laser cladding with subsequent aging is a reliable engineering solution for restoring XM-25 turbine blades, enhancing structural integrity, fatigue resistance, and surface durability.

Restoration of XM-25 turbine blades via ded laser cladding: microstructural evolution and mechanical performance

An Tiancheng, Olena Berdnikova

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Найсвіжіші номери журналів на сайті

Автоматичне зварювання №5 (2025), The Paton Welding Journal №11 (2025), Технічна діагностика та неруйнівний контроль №3 (2025), Сучасна електрометалургія №3 (2025).

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Restoration of XM-25 turbine blades via ded laser cladding: microstructural evolution and mechanical performance

An Tiancheng, Olena Berdnikova

Restoration of XM-25 turbine blades via ded laser cladding: microstructural evolution and mechanical performance

An Tiancheng, Olena Berdnikova

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