Journal
MATERIALS
Volume 14, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/ma14206140
Keywords
additive manufacturing; selective laser melting; titanium alloys; multimaterial 3D printing; graded materials
Categories
Funding
- Ministry of Science and Higher Education of the Russian Federation as part of World-class Research Center program: Advanced Digital Technologies [075-15-2020-934]
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Multimaterial additive manufacturing combines materials with different properties within a single part to produce components with improved functional properties. The microstructure of Ti/Ti64-graded samples remains stable during heat treatment and hot isostatic pressing. The mechanical properties of Ti/Ti64 samples are influenced more by the ratio of cross-sections than by their shape and location.
Multimaterial additive manufacturing is an attractive way of producing parts with improved functional properties by combining materials with different properties within a single part. Pure Ti provides a high ductility and an improved corrosion resistance, while the Ti64 alloy has a higher strength. The combination of these alloys within a single part using additive manufacturing can be used to produce advanced multimaterial components. This work explores the multimaterial Laser Powder Bed Fusion (L-PBF) of Ti/Ti64 graded material. The microstructure and mechanical properties of Ti/Ti64-graded samples fabricated by L-PBF with different geometries of the graded zones, as well as different effects of heat treatment and hot isostatic pressing on the microstructure of the bimetallic Ti/Ti64 samples, were investigated. The transition zone microstructure has a distinct character and does not undergo significant changes during heat treatment and hot isostatic pressing. The tensile tests of Ti/Ti64 samples showed that when the Ti64 zones were located along the sample, the ratio of cross-sections has a greater influence on the mechanical properties than their shape and location. The presented results of the investigation of the graded Ti/Ti64 samples allow tailoring properties for the possible applications of multimaterial parts.
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