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This study investigates the kinetics and elemental partitioning of CoNi-based γ/γ′ superalloys to enhance γ′ stability.

May 28, 2026Materials Horizons1 citations

Temperature-dependent γ′ kinetics evolutions and elemental partitioning in a novel CoNi-based superalloy: An integrated CALPHAD phase-field experimental study

KNKunning NiuNanjing University of Science and Technology ZZZan ZhangNanjing University of Science and Technology SPSang PengNanjing University of Science and Technology

Key Points

This study investigates the kinetics and elemental partitioning of CoNi-based γ/γ′ superalloys to enhance γ′ stability.
Utilized an integrated CALPHAD-Phase-field methodology to analyze the superalloy characteristics.
Conducted experimental validations to support the modeling findings.
Analyzed temperature-dependent behaviors to assess kinetic evolutions.
Achieved improved γ′ stability at elevated temperatures, with significant density reduction observed.
Demonstrated effective elemental partitioning, enhancing overall alloy performance.
Provided quantitative data supporting the proposed methodology for superalloy design.

Abstract

Co-Ni-based γ/γ′ superalloys are promising candidates for next-generation turbine blades, yet achieving high γ′ stability and low density remains a significant challenge. This study presents a physics-constrained, integrated CALPHAD-Phase-field methodology...

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