Journal Name:
- Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi
Key Words:
| Author Name | University of Author | Faculty of Author |
|---|---|---|
Abstract (2. Language):
ECAP is a suitable technique for producing ultrafine-grained high-strength materials with desirable
mechanical properties. In this study, high-purity copper bars were first processed through the ECAP method. The
microstructure of the copper was changed due to the induced hydrostatic pressure and shear strain. Combined with a
very high shear strain, this pressure generates high-density crystallographic defects that, in turn, result in the creation
of fine grains. Initially, conventional techniques including optical microscopy metallography and FESEM were used
to measure the grain size changes; however, they failed to determine the grain boundaries. Finally, changes in the
grain size induced by ECAP were measured using EBSD. According to the EBSD results, grain size decreased from
60.8 μm, for a conventional sample, to 5.4 μm after eight passes of ECAP.
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FULL TEXT (PDF):
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