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Gülhan ÇAKMAK |
Room/Lab: D-208 |
(+90)312 210 5842 |
E-mail: gcakmak@metu.edu.tr |
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Courses/Labs: |
X-ray Diffraction, Metallography |
Interests: |
Severly Deformed Materials, Hydrogen Storage |
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Former Degree: B.S.; Ceramic Engineering
Dept, Anadolu University |
Current Degree: Ph.D.; Metallurgical and Materials Engineering Dept, METU |
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Hydrogen Storage in Severly Deformed
Magnesium Based Alloys |
Supervisor: Dr. Tayfur ÖZTÜRK |
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Powder
processing is a common method for the processing of hydrogen storage alloys. The powder processing leads two structural modifications; particle fragmentation and straining. In the current work an alternative processing technique is
employed in which particle fragementation is avoided. For this purpose Mg
based alloys are deformed via equal channel angular pressing to a
relatively heavy strain and their hydrogenation properties are
characterized. |
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Tooling used in equal channel angular pressing of Mg
based alloys. Via repeted passage of sample through this die, it is
possible to reach true strain values in excess of 5. This is with the result of
substantial refinement of microıstructure down to sub-micron or nanometer range. |
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mp |
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mp |
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Microstructure in ECAPed Mg-Ti. Though phase make-up appears
to be rather coarse, the cell size in each phase is extremely small, i.e. 20 and 25 nm. |
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