Effect of nonmetallic and intermetallic inclusions on crater formation on the surface of TiNi alloys under the electron-beam impact
| Autor: | A. B. Markov, S. N. Meisner, F. D’yachenko, Evgeny Yakovlev, Ludmila L. Meisner, V.P. Rotshtein |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Surface cratering Metallurgy Alloy Intermetallic Nucleation Pulsed electron beam 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Nonmetallic inclusions TiNi SMAs Impurity 0103 physical sciences engineering Irradiation Inclusion (mineral) Composite material 0210 nano-technology Dissolution Earth-Surface Processes Eutectic system |
| Zdroj: | Procedia Structural Integrity. 2:1465-1472 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2016.06.186 |
| Popis: | The regularities of surface cratering in commercial and precision TiNi alloys irradiated with a low-energy, high-current electron beam (LEHCEB) in dependence on non-metallic (TiC(O)) or intermetallic (Ti2Ni) inclusions presented in TiNi matrix are studied. The melting threshold of TiNi alloy was found to be achieved in the range of LEHCEBs energy density E s corresponding to 1.3-1.5 J/cm 2 . The dominant role of non-metallic inclusions [mainly, TiC(O)] in the nucleation of microcraters was found. The processes initiated by pulsed heating/melting near the inclusion/matrix interface were analyzed. It is proposed that the most important factor enabling the liquid-phase dissolution of inclusions and delivery of impurities of C and O [from TiC(O)] and O (from Ti 4 Ni 2 O x ) into TiNi melt are eutectic reactions taking place in the Ti-Ni-C and Ti-Ni-O systems near Ti 50 Ni 50 composition. |
| Databáze: | OpenAIRE |
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