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reaction-hot extrusion" process was used,the Al4Sr phase exhibited a homogeneous distribution in the Al matrix with small size and roundish shapes,which ensured the Al-Sr master alloy wire advantages......
. The diameter of the cylinder is in the range of 60~110 mm. The original phase crystalline grains with roundish configuration are merged in fine eutetic crystal, and this kind of microstructure......
dendrites gradually change into roundish equiaxed grains. The second phases at the α-Mg boundaries transform from coarse, semicontinuous and non-uniform to fine, discontinuous, uniform and dispersive.... With the application of the ultrasonic treatment, the coarse dendritic structure is broken into roundish one, and with increasing the ultrasonic treatment power, the grains become more roundish which......
-sedimentation mechanism. The tungsten powders prepared by common hydrogen reduction are full-grown, and the grain morphology is roundish polyhedral. The grain size is micron order, and parts of the grains......
specimen is roundish compare with that formed on the plate specimen. The hydrogen uptake of specimen after breaking away increases but hydrogen uptake fraction decreases. So the formation of cellular......
