Production and Properties of Electron-Beam-Welded Joints on Ti-TiB Titanium Alloys
| Autor: | Valery Kostin, Petro Loboda, Tatjana Taranova, Eduard Vrzhyzhevskyi, Constantine Zvorykin, Volodymyr Zvorykin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science titanium boride microstructure 02 engineering and technology Welding mechanical properties 01 natural sciences law.invention law titanium alloys 0103 physical sciences Electron beam welding Ultimate tensile strength General Materials Science welded joint Composite material Embrittlement lcsh:Mining engineering. Metallurgy Tensile testing 010302 applied physics heat treatment Metals and Alloys Titanium alloy electron-beam welding 021001 nanoscience & nanotechnology Microstructure Butt joint 0210 nano-technology |
| Zdroj: | Metals, Vol 10, Iss 522, p 522 (2020) Metals Volume 10 Issue 4 |
| ISSN: | 2075-4701 |
| Popis: | In this article, structural features of Ti-TiB and (&alpha +&beta ) Ti alloys in the initial state, in the weld and in the heat-affected zone of electron beam welds were investigated. The influences of welding parameters, such as influence of the electron beam velocity, preheating of the welded alloys and the subsequent annealing of the welded joint on the its microstructure, and the mechanical strength and ductility of the critical elements of the joint were studied by scanning electron microscopy using microprobe Auger spectral and X-ray diffraction analysis and tensile tests. It has been shown that the conditions for rapid crystallization of the material from the melt of the weld contribute to refining of reinforcing fibers of TiB and its hardening in comparison with the starting material Ti-TiB. Besides that, influences of the preferential orientation of TiB reinforcing microfibers (along and across the welded butt joint) on the mechanical properties of the welded joint were investigated bz tensile testing. Using the methods of fractographic analysis, the effect of the boron-containing phase on the fracture character of Ti-TiB welded joints was established. It was shown that, along with the strengthening effect, TiB fibers cause embrittlement of the material. |
| Databáze: | OpenAIRE |
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