Research on Fabrication Technologies and Service Performance of Metal Materials in Additive Manufacturing
A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".
Deadline for manuscript submissions: 30 November 2025 | Viewed by 7
Special Issue Editors
Interests: superalloys; intermetallics; metal matrix composites; phase transformation and solidification; additive manufacturing
Special Issues, Collections and Topics in MDPI journals
Interests: additive manufaturing; metal matrix composites; mechanical composites; microstructure
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Additive manufacturing (AM) technology is increasingly demonstrating significant application potential in the field of material processing. AM alloys undergo unique cyclic thermal histories and layer-by-layer stacking during fabrication, resulting in distinct microstructural characteristics such as cellular structures, directional growth, grain refinement, anisotropy, residual stress, micropores, and microcracks. The grain refinement in AM alloys contributes to improved strength and toughness. However, different printing methods introduce pronounced anisotropy in mechanical properties, which may also increase susceptibility to crack initiation. In addition, residual stress can accelerate fatigue crack propagation. Consequently, understanding the formation mechanisms of various defects in AM processes and developing defect control strategies have attracted growing attention. Furthermore, defects in AM alloys—such as micropores, cracks, lack-of-fusion zones, and surface roughness—can readily lead to crack initiation and propagation, ultimately causing fracture failure. These defects significantly degrade the service life of AM alloys under conditions involving impact toughness, fatigue, and creep. Future research directions may focus on the following aspects:
- Elucidating the microstructural evolution mechanisms of AM alloys.
- Optimizing AM process parameters and post-processing strategies.
- Investigating the fracture mechanisms of AM materials under service conditions.
- Establishing more accurate and reliable fracture prediction models.
- Developing novel high-performance AM metals and composites.
- Exploring the service performance of AM alloys in extreme environments.
Research in these areas will play a crucial role in advancing additive manufacturing technology and materials science.
Prof. Dr. Rui Hu
Dr. Xian Luo
Guest Editors
Manuscript Submission Information
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Keywords
- additive manufacturing
- metal
- service performance
- defects
- impact toughness
- fatigue
- creep
- fracture behavior
- prediction models
- metal matrix composites
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