The Structural Properties of Fe-Ti-B Based Alloys Produced by Mechanical Alloying |
| O. Kon, U. Sen
aSakarya University, Technical Education Faculty, Metal Education, Department, 54187, Serdivan Sakarya, Turkey bSakarya University, Engineering Faculty, Department of Metallurgy and, Materials Engineering, 54187, Serdivan Sakarya, Turkey |
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| In the present study, the production of Fe-Ti-B based alloys was realized and their structure and properties were investigated. Mechanical alloying proceeds by the continual cold welding and fracturing of the constituent mixture of Ti+4B+5Fe powder when subjected to the large compressive forces of a high speed mill. The powder charge together with 7 mm diameter steel balls were loaded into a tool steel grinding container at approximately 350 RPM for 20 h. The samples were shaped as cylinder of Ø15×8 mm dimensions by uniaxial pressing at 450 MPa. Then, the green body materials were produced by sintering at 1100°C for 1-4 h in argon atmosphere. The morphology of composite materials was investigated by optical microscopy and scanning electron microscopy and phase analysis was realized by x-ray diffraction analysis. The bulk densities of the materials were measured using by Archimedes method. Also, the micro-hardness of the samples was measured by Vickers indentation technique. As a result, Fe, iron boride (FeB, Fe2B) and titanium boride (TiB2) phases were detected in the phase analysis of the Fe-Ti-B based materials. The hardness of the materials was measured between 1107 HV0.05 and 1551 HV0.05, depending on sintering time. The densities of the samples were determined between 4.205 g/cm3 and 4.219 g/cm3. |
DOI: 10.12693/APhysPolA.127.1214 PACS numbers: 81.20.Ev, 06.30.Dr, 62.20.Qp |