Analytical electron microscope study of the dissolution of the Fe3C iron carbide phase (cementite) during a graphitisation anneal of carbon steel
Source abstract
Abstract
The evolution of microstructure and composition of the Fe3C iron carbide phase (cementite) during a graphitisation anneal of a quenched, medium carbon steel has been studied by analytical electron microscopy, including energy dispersive X-ray spectroscopy (EDX), electron energy loss spectroscopy (EELS) and energy filtered transmission electron microscopy (EFTEM) imaging. During heat treatment at 680 °C, dissolution of the cementite particles dispersed in the martensitic matrix was completed within a time period of 1.5 h, during which time graphite nodules began to form. However, a non-graphitic carbon-rich amorphous phase was also detected during this heat treatment. It is postulated that these amorphous particles could be an intermediate stage during the overall graphitisation process.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Advanced materials and composites · Metal Alloys Wear and Properties
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