Severe plastic deformation of high-entropy alloys: A critical review of deformation mechanisms and microstructural evolution
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.2026.189852
- 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)
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
Ultrafine-grained and heterostructured materials have attracted considerable attention because of their outstanding mechanical and functional performance. Severe plastic deformation (SPD) is recognized as one of the most effective and versatile approaches for producing such materials, which cannot be achieved by conventional thermomechanical methods. High-entropy alloys (HEAs) provide a broad compositional and structural design space in which deformation behavior is governed by pronounced lattice distortion, complex multicomponent interactions, and unconventional microstructural evolution. Bringing these two research areas together has created new opportunities to tailor structure-property relationships through extreme deformation conditions. This review presents a comprehensive and critical overview of recent research on the application of SPD techniques to HEAs and related multicomponent alloys. After outlining the various SPD methods, the key deformation mechanisms and microstructural characteristics of HEAs that develop under extreme strain are discussed. These include grain refinement through dislocation activity, deformation twinning, phase transformations associated with SFs, recovery and recrystallization, nanoscale chemical redistribution, and amorphization. Special attention is given to the role of compositional complexity in influencing defect stability, grain boundary mobility, and phase stability during and after SPD processing. The mechanical behavior and strengthening mechanisms are discussed in detail, with particular focus on the remarkable combination of high strength and retained ductility made possible by SPD. Overall, the collected findings show that SPD should be viewed not only as a method for strengthening materials but also as a powerful approach for creating and stabilizing new structural and functional states in HEAs. It is further shown that certain topics, such as the effects of extreme deformation on chemical short-range ordering and its consequences, remain insufficiently investigated and represent promising directions for future research.