Additive Processing of High-Temperature Alloys

Dear Colleagues,

The transformative potential of additive manufacturing (AM) in reshaping traditional production paradigms is widely recognized, particularly in the fabrication of intricately designed components using materials that have traditionally posed machining challenges, such as superalloys. The realization of AM’s profound impact on future turbine designs, where its capabilities can be harnessed to craft high-temperature alloy parts with advanced geometries, is gaining momentum. Consequently, there is a current emphasis on exploring diverse aspects of various AM technologies, aimed at advancing scientific comprehension and expediting their integration into industrial practices.

The substantial investments of time and research efforts have yielded continuous developments across the spectrum of AM, fostering growing optimism regarding the widespread adoption of AM techniques for the manufacturing, repair, and overhaul of superalloy components. This call to attention underscores the need to showcase these remarkable advancements, giving rise to the proposal for a Special Issue in Materials, dedicated to highlighting cutting-edge developments in the AM of high-temperature materials.

Contributions are cordially invited from experts actively engaged in the following areas, among others:

1. Alloy Design and Selection:
   Exploration of novel alloy compositions tailored for additive manufacturing processes, focusing on optimizing material properties and performance.
2. Powder Production and Pre-processing:
   Investigations into the production and pre-processing of powders, examining their influence on build quality, material integrity, and subsequent properties.
3. Process Parameter Impact and Optimization:
   In-depth analyses of the impact of process parameters on the AM build, coupled with optimization strategies to enhance efficiency and reliability.
4. Post-processing of Builds:
   Encompassing treatments such as Hot Isostatic Pressing (HIPing), heat treatment, machining, welding, etc., to refine the properties of additively manufactured high-temperature material components.
5. Advanced Characterization:
   Advancements in techniques for characterizing the microstructure, composition, and properties of additively manufactured high-temperature materials.
6. Residual Stress and Distortion:
   Investigations into mitigating challenges related to residual stresses and distortion in high-temperature material components, crucial for ensuring dimensional accuracy.
7. Mechanical and Functional Property Assessment:
   Rigorous assessments of the mechanical and functional properties of additively manufactured high-temperature materials under various operating conditions.
8. Process–Microstructure–Property Correlations:
   Establishment of comprehensive correlations between the AM process, resulting microstructure, and the ensuing material properties.
9. Modeling:
   Advancements in numerical and computational modeling techniques to simulate and predict the behavior of high-temperature materials during the additive manufacturing process.
10.  Process Reliability and Qualification:
    Investigations into ensuring the reliability and qualification of AM processes, particularly focusing on standards and certifications.
11. Applications:
    Practical applications of additively manufactured high-temperature material components across diverse industries, demonstrating the scalability and versatility of these technologies.

I eagerly anticipate your valuable contributions to this Special Issue, which aims to be a pivotal resource in disseminating the latest advancements and fostering collaborative efforts to propel the AM of high-temperature materials to new heights.

Warm regards,

Prof. Dr. Joel Andersson
Guest Editor

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• additive manufacturing
• superalloys
• turbine designs
• high-temperature alloy optimization
• post-processing
• advanced characterization
• residual stress
• mechanical properties
• applications