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The Structural Properties of Fe-Ti-B Based Alloys Produced by Mechanical Alloying

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Kon O., Sen U.

Acta Physica Polonica A

2015

vol. 127

issue 4

1214-1217

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 HV_{0.05} and 1551 HV_{0.05}, depending on sintering time. The densities of the samples were determined between 4.205 g/cm³ and 4.219 g/cm³.

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1 Acta Physica Polonica A

1 2015

1 Kon O.

1 Sen U.

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The Structural Properties of Fe-Ti-B Based Alloys Produced by Mechanical Alloying