Development of L12 nanoparticles strengthened Ni-Co-Al-Ta based superalloys with excellent comprehensive properties

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-09-24 DOI:10.1016/j.intermet.2025.109007

Haojun Zhuo , Debin Zheng , Chen Yang , Yihui Guo , Jiajia Han , Cuiping Wang , Xingjun Liu

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Abstract

This study addresses a critical research gap by pioneering a systematic alloy design in the Co-Ni-Al-Ta system, leveraging a thermodynamic database and CALPHAD method to optimize Ni content, leading to the development of a novel Co-45Ni-12Al-4Ta-2W superalloy with exceptional properties. Key innovations include the identification of an optimal Co-45Ni-12Al-4Ta master alloy and comprehensive analysis of γ′-forming elements (Mo, V, W, Ti, Nb), which revealed that W addition achieves an optimal balance between different properties: intermediate γ′/γ misfit (1.08 %) and low coarsening rate ((1.07 ± 0.07) × 10⁻²⁷ m³/s), coupled with unprecedented thermal stability (γ′ solvus at 1250 °C and solidus at 1372 °C). Remarkably, this alloy demonstrates anomalous strengthening at 650 °C, yielding compressive strengths of 1059 ± 32 MPa (RT), 1060 ± 31 MPa (650 °C), and 668 ± 21 MPa (900 °C), highlighting its potential for next-generation aerospace materials through further optimization.

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L12纳米颗粒增强综合性能优异的Ni-Co-Al-Ta基高温合金的研制

本研究通过在Co-Ni-Al-Ta体系中开创系统合金设计，利用热力学数据库和CALPHAD方法优化Ni含量，从而开发出具有优异性能的新型Co-45Ni-12Al-4Ta-2W高温合金，解决了一个关键的研究空白。关键创新包括鉴定出最佳的Co-45Ni-12Al-4Ta母合金和对γ′形成元素（Mo， V， W, Ti, Nb）的综合分析，表明W的加入达到了不同性能之间的最佳平衡：中间γ′/γ失配（1.08%）和低粗化速率（（1.07±0.07）× 10−27 m3/s），以及前所未有的热稳定性（γ′溶剂在1250°C，固体在1372°C）。值得注意的是，该合金在650°C时表现出异常强化，抗压强度分别为1059±32 MPa （RT）、1060±31 MPa（650°C）和668±21 MPa(900°C)，通过进一步优化，突出了其作为下一代航空航天材料的潜力。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.