2019 Pittsburgh AISTech

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Designing a Graphitic White Iron: Microstructures and Properties (Room 414)

Introducing interconnected flake graphite networks into a white iron can reduce the thermal induced adhesive abrasion in metal-to-metal wear systems and extend their lifetime. The first generation of graphitic white irons were designed, produced and investigated. Thermal diffusivity for studied alloys was measured using laser flash apparatus following ASTM E1461 and results showed thermal diffusivity increases with increasing graphite volume fraction. Wear property was tested using dry sand/rubber wheel apparatus following ASTM G65, and it was found graphite has a positive contribution to the wear resistance. Wear mechanism is being investigated utilizing SEM and EBSD to direct future alloy design.