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Microstructure, tribological property and high temperature tensile property of Co-Cr-Ni-W alloy parts fabricated by laser directed energy deposition.
- Source :
-
Surface & Coatings Technology . May2024, Vol. 483, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- In this study, Co-Cr-Ni-W alloy parts were fabricated on the surface of 304 stainless steel (SS) substrate by laser directed energy deposition (LDED). Microstructure, microhardness and tribological behavior of as-deposited samples and 750 °C–950 °C aging-treated samples were tested. Carbides precipitated from Co-Cr-Ni-W alloy, and martensite transformation from γ-Co (FCC) to ε-Co (HCP) occurred in high temperature. The changes of microstructure caused by aging treatment could increase the microhardness and change wear mechanism. Tensile property of Co-Cr-Ni-W alloy at 750 °C–950 °C was also investigated. Co-Cr-Ni-W alloy formed a hard-sliding structure under high temperature, leading to high tensile strength. The main fracture mode of Co-Cr-Ni-W alloy was brittle cleavage fracture. • Discussed the effects of various elements in laser clad Co-Cr-Ni-W alloy • Revealed the wear mechanism of laser clad Co-Cr-Ni-W alloy • Evaluated the tensile property of Co-Cr-Ni-W alloy at high temperatures • Analyzed the fracture mechanism of Co-Cr-Ni-W alloy during stretching [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02578972
- Volume :
- 483
- Database :
- Academic Search Index
- Journal :
- Surface & Coatings Technology
- Publication Type :
- Academic Journal
- Accession number :
- 176924407
- Full Text :
- https://doi.org/10.1016/j.surfcoat.2024.130807