Microstructure evolution in grey cast iron during directional solidification

Circumferential failures in grey cast iron pipes

Micrograph evidence of meniscus solidification and sub-surface microstructure evolution in continuous-cast ultralow-carbon steels

Hooks and other sub-surface features in continuous-cast ultralow-carbon steel samples were examined using optical microscopy, electron backscattering diffraction, energy dispersive X-ray spectroscopy, and electron probe microanalysis techniques. Special etching reagents revealed dendrites growing from both sides of the line of hook origin. This line was found to represent the frozen meniscus an...

Microstructure Formation and Fracturing Characteristics of Grey Cast Iron Repaired Using Laser

The repairing technology based on laser rapid fusion is becoming an important tool for fixing grey cast iron equipment efficiently. A laser repairing protocol was developed using Fe-based alloy powders as material. The microstructure and fracturing feature of the repaired zone (RZ) were analyzed. The results showed that regionally organized RZ with good density and reliable metallurgical bond c...

Niobium alloying effect in high carbon equivalent grey cast iron

Male, born in 1959. Professor and doctoral supervisor. He gained his Ph.D from University of Science and Technology Beijing in 1991. His research interests mainly focus on metal solidification, new continous casting technology, cast alloys and materials, etc. By now, his more than 220 academic papers have been published in journals demestic and abroad. He also holds 22 invention patents of Chin...

Analysis of microstructural strain-fields in grey cast iron

With increasing engine capacity the demand on the material increases. To meet the requirements new more advanced test methods are invented. One of these test methods is the digital image correlation technique (DIC). This method analyses deformations in materials by correlating the displacement in a set of sequentially acquired images. To be able to measure the deformations the material needs to...