Manipulating Stacking Fault Energy to Achieve Crack Inhibition and Superior Strength–Ductility Synergy in an Additively Manufactured High‐Entropy Alloy
Central South University · State Key Laboratory of Powder Metallurgy · +2 more institutions
Abstract
Abstract Additive manufacturing (AM) is a revolutionary technology that heralds a new era in metal processing, yet the quality of AM‐produced parts is inevitably compromised by cracking induced by severe residual stress. In this study, a novel approach is presented to inhibit cracks and enhance the mechanical performances of AM‐produced alloys by manipulating stacking fault energy (SFE). A high‐entropy alloy (HEA) based on an equimolar FeCoCrNi composition is selected as the prototype material due to the presence of microcracks during laser powder bed fusion (LPBF) AM process. Introducing a small amount (≈2.4 at%) of Al doping can effectively lower SFE and yield the formation of multiscale microstructures that…
Citation impact
- FWCI
- 22.40
- Percentile
- 100%
- References
- 63
Authors
6- PNPengda Niu
Central South University, State Key Laboratory of Powder Metallurgy
- RLRuidi LiCorresponding
Central South University, State Key Laboratory of Powder Metallurgy
- KGKefu GanCorresponding
Central South University
- ZFZhiqi Fan
Xi'an Jiaotong University
- TYTiechui Yuan
Central South University, State Key Laboratory of Powder Metallurgy
Topics & keywords
- Materials science
- Stacking-fault energy
- Alloy
- Microstructure
- Cracking
- Ductility (Earth science)
- Residual stress
- Stacking
- Affordable and clean energy