Interface of a al6061/ti composite prepared by field assisted sintering technique

0555687 - ÚFP 2022 RIV CH eng J - Journal Article
Kozlík, J. - Veselý, J. - Stráský, J. - Chráska, Tomáš - Janeček, M.
Interface of a al6061/ti composite prepared by field assisted sintering technique.
Metals. Roč. 11, č. 1 (2021), s. 1-12, č. článku 73. E-ISSN 2075-4701
R&D Projects: GA ČR(CZ) GA19-11275S
Institutional support: RVO:61389021
Keywords : Aluminium * Composites * Diffusion bonding * Field assisted sintering technique * Intermetallics * Titanium
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 2.695, year: 2021
Method of publishing: Open access
https://www.mdpi.com/2075-4701/11/1/73

Architectured heterogeneous metallic composites consist of two dissimilar materials with a particular focus on spatial arrangement of constituents. This experimental study describes the application of Field Assisted Sintering Technique (FAST) for manufacturing of composite materials by sintering of a bulk reinforcement with a powder metal. Simple structure made of Ti wire (Ti Grade 2) was sintered with Al6061 alloy powder at 560◦C for 10 min. Successful material bonding and evolution of diffusion layer was thoroughly studied by scanning and transmission electron microscopy. Diffusion layer and adjacent precipitates are described as ternary Ti-Al-Si τ1 and τ2 phases. Si, as an alloying element in the Al6061 alloy, significantly affects the formation of the diffusion layer at the material interface due to its high inter-diffusion coefficient in both Al and Ti. Detailed TEM analysis also showed a modulated τ1/τ2 structure resembling a long-period stacking order (LPSO) phase, which has not been previously reported in the Ti-Al-Si ternary compounds. FAST is capable to manufacture composites from dissimilar constituents, which opens new possibilities for design and manufacturing of architectured materials.
Permanent Link: http://hdl.handle.net/11104/0330151