The effects of solution treatment time on the morphology evolution Si particles and thermal conductivity tensile properties Sb-modified alloys were studied. results show that follows four mechanisms: spheroidization, necking splitting with large aspect ratios, fusion spherical particles, coarsening controlled by diffusion. first three mechanisms mainly occur at early stage treatment. addition S...

The evolution of the microstructure an AlSi7Cu3 alloy is investigated by optical microscopy and X-ray tomography in as-cast condition with subsequent solution treatments for 2 h 30 min 50 at 495 °C, respectively. analyzed contains pores hard inclusions, i.e. eutectic Si, iron-intermetallics, Al2Cu phases. 2D microscopic surface examination was performed to reveal characteristics Si phase while ...

To study the effect of Ce on morphology manganese sulfide, we added different contents into U75V heavy rail steel. The composition and sulfide in steel were analyzed. inclusions’ number, size, aspect ratio analyzed by automatic scanning electron microscope ASPEX. results show that inclusions without are elongated MnS irregular Al-Si-Ca-O inclusions. With increase from 52 ppm to 340 ppm, main ch...

Abstract 17-4 PH stainless steel alloy has been widely used in the field of defence industry such as weapon equipment, aerospace, nuclear energy, and so on because its high strength, toughness, temperature resistance, corrosion resistance. In order to meet flexible manufacturing requirements multi-variety small batch complex structure products with lower cost higher efficiency, selective laser-...