Mechanical Property of Pure Magnesium: From Orientation Perspective Pertaining to Deviation from Basal Orientation
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Pure magnesium is subjected to cold rolling followed by annealing at 200 °C to obtain near-equiaxed grains of average grain size ~15 µm. The hardness of different grains/orientations of the annealed samples is estimated through consecutive characterization by nanoindentation and electron backscattered diffraction. It is observed that an increase in deviation from basal orientation decreases the hardness of an orientation. Orientations <14° from basal orientation have higher hardness compared to orientations at 14° to 28° from basal orientations. Subsequently, the texture and microstructure of pure magnesium are tailored to examine the correlation between volume fractions of basal orientations with the bulk hardness of the samples. A direct relationship of hardness with the volume fraction of basal orientations is observed. Magnesium with higher volume fraction of basal orientations has higher hardness.
Keywordselectron backscattered diffraction hardness magnesium nanoindentation orientation
The authors would like to thank UGC NRC-M of IISc Bangalore for financial and experimental support. They would like to thank Prof. I. Samajdar to conduct some textural analysis at the National Facility on OIM & Texture, IIT Bombay. They would also like to thank Prof. P. Pant for helping nanoindentation measurement at Dept. of Metallurgical Engg. & Materials Sci., IIT Bombay.
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