Abstract
Stainless steel composites combine corrosion resistance and toughness of the metallic matrix with wear resistance granted by hard reinforcing nanoparticles. Given their near-net-shape manufacturing characteristics, additive manufacturing techniques are attractive to produce these hard and wear-resistant classes of materials with low machinability. In this work, from a SAF 2205 duplex stainless steel with boron addition, laser powder bed fusion (LBPF) was employed to produce an ultrafine-grained (∼1 µm), dense (porosity ∼0.1 %), and crack-free ferritic-induced matrix composite with Cr2B-nanoborides reinforcing the grain boundaries (GBs) without formation of Cr-depleted regions. The composite showed significant higher hardness (up to 456 HV0.5) and wear resistance (4.4 x 10−5 mm3 N−1 m−1) in sliding condition compared to a hot-rolled (225 HV0.5 and 2.9 x 10−3 mm3 N−1 m−1) and a LPBF-produced SAF 2205 (314 HV0.5 and 3.3 x 10−4 mm3 N−1 m−1).
Originalsprache | englisch |
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Aufsatznummer | 102079 |
Seitenumfang | 8 |
Fachzeitschrift | Materialia |
Jahrgang | 34 |
Frühes Online-Datum | 3 Apr. 2024 |
DOIs | |
Publikationsstatus | Elektronische Veröffentlichung vor Drucklegung. - 3 Apr. 2024 |
Schlagwörter
- additive manufacturing
- stainless steel
- nanocomposite
- grain refining
- wear
ASJC Scopus subject areas
- Allgemeine Materialwissenschaften
Fields of Expertise
- Advanced Materials Science