Use of Rhenium-alloyed powders in additive manufacturing: Current status and challenges
Journal of Alloys and Compounds, cilt.1079, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Derleme
- Cilt numarası: 1079
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jallcom.2026.189864
- Dergi Adı: Journal of Alloys and Compounds
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Public Affairs Index, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Additive Manufacturing, Mechanical Properties, Porosity, Powder Bed Fusion, Rhenium Alloys
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
Rhenium (Re) has attracted increasing interest as an alloying element in additive manufacturing (AM) due to its exceptionally high melting point, solid-solution strengthening capability, and potential to enhance microstructural stability under extreme service conditions. This review provides a comprehensive and comparative assessment of Re-containing alloy powders processed by powder bed fusion–based methods, with a focus on titanium-, nickel-, tungsten-, and molybdenum-based systems. Emphasis is placed on powder preparation routes, Re dissolution behavior, porosity formation, microstructural evolution, and their collective influence on mechanical properties. The reviewed literature reveals that Re addition significantly influences alloy behavior in a system-dependent manner. In titanium-based alloys, Re promotes grain refinement and phase stabilization, resulting in substantial increases in yield, ultimate tensile strength, and hardness, but at the expense of reduced ductility and fatigue resistance. In tungsten-based systems, Re effectively mitigates cracking susceptibility by refining grain structures and enhancing relative density, thereby improving ductility and structural integrity despite limited increase in hardness. For molybdenum-based alloys, Re addition improves high-temperature strength and compressive ductility through solid-solution effects and modified dislocation behavior while low Re concentrations may induce softening at room temperature. In contrast, the mechanical benefits of Re addition in nickel-based superalloys are comparatively limited and strongly dependent on powder preparation, process parameters, and post-processing strategies, although improvements in oxidation and corrosion resistance are frequently reported. It is noted that rhenium is not merely a strengthening element, but it is a strategic alloying addition capable of fundamentally enhancing the processability, microstructural stability, and high-temperature performance of additively manufactured alloy systems.