Abstract
TiC-reinforced SKD11 steel matrix composite, fabricated by a pressure infiltration casting, undergoes monotonic decrease in hardness as tempering temperature increases. Element mappings by TEM–EDS and thermodynamic calculation indicate that remarkable redistribution of V between the reinforcement and the steel matrix occurs by partial dissolution and re-precipitation of MC carbides upon casting process. The absence of secondary hardening is led by the enrichment of V in the reinforcement that reduces the V content in the steel matrix; this reduction in V content makes the precipitation of fine VC sluggish during the tempering.
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This study was financially supported by the Civil Military Technology Cooperation Center, the Agency for Defense Development (ADD), Republic of Korea (14-CM-MP-03).
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Hwang, JI., Kim, S.H., Heo, YU. et al. Tempering Behavior of TiC-Reinforced SKD11 Steel Matrix Composite. Met. Mater. Int. 24, 644–651 (2018). https://doi.org/10.1007/s12540-018-0065-z
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DOI: https://doi.org/10.1007/s12540-018-0065-z