3rd prize photo
Authors: Dr. Asim Bag & Dr. Zhou Wei, School of Mechanical & Production Engineering, NanyangTechnological University, Singapore 639 798
Material : Ferritic-pearlitic ductile iron.
Etchant : Tint etched with Beraha's sulfide reagent.
Structural: Bull's Eye structure of graphite nodules
Features: Surrounded by ferrite. Viewed with polarized light using Nikon optical microscope. Buehler polisher and consumables was used for specimen preparation. Date: November 1999.