- What is the problem/issue being addressed?
The problem/issue being addressed in the provided data is centered around the development of a new generation of superalloys, specifically High Entropy Superalloys (HESAs), with a focus on improving their properties relative to existing high-temperature materials, particularly Ni-based superalloys. The project aims to overcome limitations associated with conventional superalloys and enhance their performance, efficiency, and printability, especially in advanced manufacturing technologies like Laser Powder Bed Fusion (L-PBF). The key challenge addressed is the need for materials with elevated γ' solvus temperature and a narrowed freezing range, crucial for applications in aerospace, power technologies, and advanced manufacturing. The project explores the integration of High Entropy Alloys (HEAs) principles, particularly configurational entropy, in the design and development of these novel superalloys, presenting a strategic shift toward innovative research areas based on emerging findings.
- Why is it important for society?
The obtained results make a substantial contribution to addressing major European societal challenges, particularly in enhancing energy efficiency and reducing greenhouse gas emissions. The successful implementation of novel HESAs in industries such as aerospace and power generation, where superalloys play a pivotal role, showcases their potential impact on advancing sustainability goals. These outcomes are aligned with the objectives of the Green Deal and Fit for 55 initiatives, reflecting a commitment to environmentally conscious practices and technologies. Furthermore, the results align with the Strategic Research and Innovation Agenda (SRIA) of the Advisory Council for Aviation Research and Innovation in Europe (ACARE), emphasizing their relevance to the strategic priorities in the aviation sector.
- What are the overall objectives?
The overall objectives of the project include:
• Development of CoNi-based HESAs: The primary goal is to design, develop, and optimize a new generation of superalloys known as CoNi-based HESAs. These alloys aim to surpass the properties of existing high-temperature materials, particularly Ni-based superalloys.
• Integration of High Entropy Alloys (HEAs) Principles: The project seeks to integrate principles of HEAs, with a specific focus on configurational entropy, into the design and development processes of CoNi-based superalloys.
• Enhancement of 3D Printability: The optimization of processing parameters, especially in the context of L-PBF technology, aims to achieve defect-resistant HESAs with high γ' volume fractions. This contributes to improving the 3D printability of the developed superalloys.
• Investigation of Thermodynamic Relationships: The project involves a thorough literature review and thermodynamic calculations to establish and validate relationships between configurational entropy and the γ' solvus temperature in Co- or CoNi-based superalloys.
• Materials Characterization and Advanced Manufacturing: Utilizing advanced materials characterization methods, such as scanning and transmission electron microscopies, micro-computed tomography, and mechanical testing, the project aims to understand and optimize the properties of the developed HESAs. Additionally, the research focuses on the application of innovative manufacturing processes like Spark Plasma Sintering (SPS) and L-PBF.
• Contribution to Sustainable Metallurgy: The overall objectives align with the principles of sustainable metallurgy, encompassing both alloy design and development (indirect sustainability) and the enhancement of 3D printability for advanced superalloys (direct sustainability).
In summary, the project's overarching objectives aim to advance the understanding and application of HESAs, with a focus on improving their properties, optimizing manufacturing processes, and contributing to the sustainable development of metallurgical practices.
