New Processes and Technologies in Alloy Materials: Focus on Additive Manufacturing, HEAs, and Welding

Dear Colleagues,

Alloy materials drive innovation across aerospace, energy, automotive, and advanced manufacturing industries. With growing the demands for high-performance materials suitable for extreme environments, emerging technologies are enhancing microstructural control, mechanical properties, and sustainability. 

This Special Issue focuses on three key areas: additive manufacturing (AM), high-entropy alloys (HEAs), and welding technologies. AM offers exceptional design freedom and material efficiency, yet challenges remain in process optimization, defect mitigation, and property consistency. HEAs, known for their complex chemistries and outstanding mechanical properties, are being explored for high-temperature stability and corrosion resistance. Welding technologies are advancing via friction stir welding, hybrid techniques, and laser-based methods to improve the joining of dissimilar or hard-to-weld alloys.

Recent studies have sought highlight microstructure–property relationships, in situ monitoring, phase transformation behavior, and the integration of AM with tailored heat treatments. In addition, machine learning-driven alloy design and process control are accelerating the discovery of new alloys and optimizing processing routes.

This Special Issue welcomes original research and review articles that present novel insights and practical applications in alloy development and processing. Contributions featuring experimental work, modeling, machine learning approaches, or industry-focused case studies are particularly encouraged.

Dr. Waris Nawaz Khan
Dr. Nitin Saini
Guest Editors

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