Interfacial processes during diffusion welding of titanium alloy/aluminium couples under ambient atmosphere
| Autor: | M. Kamal Karfoul, Gordon J. Tatlock |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering Metallurgy Metals and Alloys Intermetallic Titanium alloy chemistry.chemical_element 02 engineering and technology Welding Surface finish Diffusion welding Microstructure 020501 mining & metallurgy law.invention 020901 industrial engineering & automation 0205 materials engineering chemistry Mechanics of Materials law Aluminium Thin film |
| Zdroj: | WELDING IN THE WORLD |
| Popis: | In this study, it is reported that the diffusion welding of α-titanium and (α + β) titanium alloys with aluminium has been carried out by applying sufficient compression to the welded samples to give a high level of plastic deformation in the Al layers sandwiched between layers of titanium alloy with a moderate surface finish. Both metals are active in the air; such diffusion processes can take place under vacuum. However, we report, that high-quality welds were achieved at temperatures between 610 and 630 °C under ambient air atmosphere, without the use of vacuum or reducing atmospheres. The resulting microstructures and intermetallic phases were characterised using scanning and transmission electron microscopy and EDX microanalysis. This showed that under the welding parameters selected, Ti diffused across the interface into Al and Al into Ti, since the protective Al2O3 thin film on the surface of aluminium layer has been disrupted due to the Al layer plastic deformation. Impact tests of welds gave relatively high energy impact values. |
| Databáze: | OpenAIRE |
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