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Report No.
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Deformation behavior of graphite in cast iron

Harjo, S.   ; Aizawa, Kazuya  ; Gong, W.; Kubota, Satoru*; Tomota, Yo

Graphite is a brittle material and has a very low strength, but its role in deformation behavior of ductile cast irons (FCD steels) is not well known. FCD steels are well known that their morphologies can be tuned by post heat-treatments and these give a very wide range of mechanical properties. However, there were almost no studies to describe direct relations between the morphologies and the mechanical properties, especially a role of the graphite in the deformation behavior. The deformation behavior of an FCD steel during cyclic tension-compression deformation at RT was measured using in situ neutron diffraction at TAKUMI of J-PARC/MLF, by understanding load sharing among the constituent phases. A cyclic tension-compression experiment was conducted with a strain control on the TAKUMI's loading machine using an FCD steel, and experimental results will be discussed.

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