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2015 | 127 | 4 | 1103-1105
Article title

Characterization of TiAl-Be Alloys Produced by Electric Current Activated Sintering

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EN
Abstracts
EN
In this study, TiAl-Be intermetallic alloys were produced by electric current-activated sintering (ECAS) method in open air under the uniaxial pressure of 200 MPa at a current of 1100-1200 A, applied for 2 minutes. Aluminum powder with 15 μm size (99%), titanium powder with less than 45 μm size (99.5%) and beryllium powder with size less than 44 μm size (99%) were used in order to produce the samples. The elemental powders were mixed in the stoichiometric ratio of 1:1, corresponding to molar proportion of TiAl intermetallic phases, and then the mixed powders were synthesized. While three phases were found in the TiAl samples after the microstructural examination, multi-phases were observed in the TiAl-5 wt.% Be samples. XRD studies revealed that the TiAl intermetallic alloys include TiAl, Ti₃Al and TiAl₃ phases. In addition to these three phases, Be₂Ti phase was also found in the TiAl-5 wt.% Be alloys. The relative densities of the TiAl and TiAl-5 wt.% Be samples, measured according to Archimedes' principle, were approximately 96.4% and 94.5%. Micro-hardness of TiAl and TiAl-5 wt.% Be samples was approximately 426± 34 and 478± 62 HV_{0.1}, respectively.
Keywords
EN
Year
Volume
127
Issue
4
Pages
1103-1105
Physical description
Dates
published
2015-04
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n4067kz
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