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Microstructural study of the nano-scale martensitic lamellar α-Co and ε-Co phases of a Co–Cr alloy fabricated by selective laser melting
- Source :
- Journal of Materials Research and Technology, Vol 12, Iss, Pp 437-443 (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- An interfacial microstructural study was carried out to clarify the hardening mechanism of an as-built Co–Cr alloy fabricated by selective laser melting (SLM). Using transmission electron microscopy, we found a unique martensitic lamellar microstructure with a specific orientation relationship between the α-Co and e-Co phases; specifically, a nanoscale microstructure consisting of (111)α-Co//(000 2 ¯ )e-Co and [0 1 ¯ 1]α-Co//[ 1 ¯ 2 1 ¯ 0]e-Co was formed on the Co–Cr alloy. The Co–Cr alloy fabricated by SLM with a martensitic microstructure achieved a Vickers hardness value of approximately 369.36 ± 11.86 HV without any secondary-phase particles such as carbides.
- Subjects :
- Materials science
Alloy
02 engineering and technology
engineering.material
01 natural sciences
Biomaterials
0103 physical sciences
Lamellar structure
Selective laser melting
Composite material
Microstructure
010302 applied physics
Mining engineering. Metallurgy
TN1-997
Metals and Alloys
021001 nanoscience & nanotechnology
Co–Cr alloy
Surfaces, Coatings and Films
Transmission electron microscopy
Martensite
Vickers hardness test
Ceramics and Composites
Hardening (metallurgy)
engineering
0210 nano-technology
Orientation relationship
Subjects
Details
- ISSN :
- 22387854
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Research and Technology
- Accession number :
- edsair.doi.dedup.....367afdb1cf938afad13da1a31d208781