Journal
COMPOSITES PART B-ENGINEERING
Volume 234, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2022.109745
Keywords
Directed energy deposition; Martensitic stainless steel; Metallic matrix composites; Strength-ductility trade-off
Ask authors/readers for more resources
Through the configuration design of ceramic particles, additively manufactured martensitic stainless steel can be strengthened with an optimized combination of high strength and increased ductility. In addition, this steel shows excellent resistance to severe localized corrosion and has unique microstructures and a progressive transformation-induced plasticity effect.
Many traditional methods for strengthening martensitic stainless steel (SS) typically come at the sacrifice of ductility. Herein, we report a configuration design of ceramic particles for reinforcing additively manufactured 15-5 PH martensitic SS with an optimized combination of high-strength and impressively larger ductility via the micron-sized TiC addition. High strength is ascribed to grain refinement, Orowan bowing strengthening, and abundant nucleation of nanoscale (Nb,Ti)C precipitates, while high elongation correlates to the reduced oxide inclusion content, martensite/austenite duplex microstructure, and progressive transformation-induced plasticity effect. In addition, severe localized corrosion is completely inhibited. This work shows the great potential of additive manufacturing technology to fabricate Fe-based composites with unique microstructures, low residual stress levels, excellent corrosion resistance, and an exceptional combination of strength and ductility for practical applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available