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This work concerns the effect of solution temperature on the microstructure and corrosion property aged at 750 °C in 25% Cr duplex stainless steel (DDS). The evolution of microstructure and phase compositions were studied by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Precipitation of sigma phase initially occurred rapidly aging for 80 min, subsequently became...
The effect of the rare earth cerium (Ce) on the hypereutectic Al-Si alloy under different casting states have been studied by optical microscope and quantitative image analysis. It is found that the size and the quantity of primary silicon in castings decrease with the increase of added Ce in the melt. Meanwhile primary silicon changes from branched shape to fine facetted shape. Although the modification...
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