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2013•Journal of the Korean Society for Heat TreatmentOpen access

Effects of Mo on the Mechanical Properties of Ductile Cast Iron with Cu Austempered at 380℃

G.Y. Kim

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Abstract

In this study, we investigated effect of Mo addition on mechanical properties of Cu added ADI. Ductile cast iron specimens were austenitized at $900^{\circ}C$ for 150 min and then austempered at $380^{\circ}C$ for the various time periods from 15 min to 480 min. Mo added ADI had a higher volume fraction of retained austenite, and the volume fraction of retained austenite was determined by XRD analysis. As decreasing volume fraction of retained austenite, the elongation was also decreased as expected. But the UTS and yield strength were not decreased.

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In this study, we investigated effect of Mo addition on mechanical properties of Cu added ADI. Ductile cast iron specimens were austenitized at $900^{\circ}C$ for 150 min and then austempered at $380^{\circ}C$ for the various time periods from 15 min to 480 min. Mo added ADI had a higher volume fraction of retained austenite, and the volume fraction of retained austenite was determined by XRD analysis. As decreasing volume fraction of retained austenite, the elongation was also decreased as expected. But the UTS and yield strength were not decreased.

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Available abstract

In this study, we investigated effect of Mo addition on mechanical properties of Cu added ADI. Ductile cast iron specimens were austenitized at $900^{\circ}C$ for 150 min and then austempered at $380^{\circ}C$ for the various time periods from 15 min to 480 min. Mo added ADI had a higher volume fraction of retained austenite, and the volume fraction of retained austenite was determined by XRD analysis. As decreasing volume fraction of retained austenite, the elongation was also decreased as expected. But the UTS and yield strength were not decreased.

Key concepts: Austempering, Austenite, Volume fraction, Materials science, Elongation, Metallurgy, Cast iron, Volume (thermodynamics)

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