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<p>Recent advances in the manufacturing business have necessitated accelerated delivery of high entropy alloys (HEAs) for consumer markets because of an excellent combination of thermal, chemical, and mechanical properties. In the HEA manufacturing process, the additive manufacturing (AM) using selective laser melting (SLM) technique is widely adopted because it offers high-quality, cost-effective, and reliable HEA parts. HEAs possess unique phase constitutions and exhibit some distinctive characteristics such as high entropy, sluggish diffusion, cocktail, and lattice distortion effects for applications in the key sectors of energy, aerospace, transportation, and biomedical engineering. However, a major challenge with SLM manufacturing of HEAs arises from defects such as porosity, cracking, and delamination from the build plate which hampers the mechanical and structural integrity of HEA parts. Given the limited research on the microstructural evolution of AM-SLM manufactured alloy, this review examines the current state of knowledge from diverse perspectives including the effect of SLM processing parameters such as the powder characteristics, the laser characteristics, layer thickness on the microstructure, and density of the produced HEAs. The review also highlights the microstructural features and defects formation on the mechanical, thermal, corrosion, irridation, and creep properties. Furthermore, the microstructural defect mitigating approaches were discussed. The final section of this review summarizes the key findings offering sustainable solutions across various industries and future research directions for SLM-HEA advancement.</p>

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Additive manufacturing of high entropy alloys via selective laser melting: a nascent review on defects mitigation, microstructural evolution, mechanical and other functional properties

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Sodiq Abiodun Kareem,
  • Olajesu Favor Olanrewaju,
  • Justus Uchenna Anaele,
  • Ikeoluwa Ireoluwa Ogedengbe,
  • Tunji John Erinle,
  • Moses Azeez Olayiwola,
  • Chiakwadobem Chino Chinedu,
  • Samuel Ranti Oke,
  • Michael Oluwatosin Bodunrin,
  • Nthabiseng Maledi

摘要

Recent advances in the manufacturing business have necessitated accelerated delivery of high entropy alloys (HEAs) for consumer markets because of an excellent combination of thermal, chemical, and mechanical properties. In the HEA manufacturing process, the additive manufacturing (AM) using selective laser melting (SLM) technique is widely adopted because it offers high-quality, cost-effective, and reliable HEA parts. HEAs possess unique phase constitutions and exhibit some distinctive characteristics such as high entropy, sluggish diffusion, cocktail, and lattice distortion effects for applications in the key sectors of energy, aerospace, transportation, and biomedical engineering. However, a major challenge with SLM manufacturing of HEAs arises from defects such as porosity, cracking, and delamination from the build plate which hampers the mechanical and structural integrity of HEA parts. Given the limited research on the microstructural evolution of AM-SLM manufactured alloy, this review examines the current state of knowledge from diverse perspectives including the effect of SLM processing parameters such as the powder characteristics, the laser characteristics, layer thickness on the microstructure, and density of the produced HEAs. The review also highlights the microstructural features and defects formation on the mechanical, thermal, corrosion, irridation, and creep properties. Furthermore, the microstructural defect mitigating approaches were discussed. The final section of this review summarizes the key findings offering sustainable solutions across various industries and future research directions for SLM-HEA advancement.