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Influence of zirconium on mechanical properties and phase transformation in low carbon steel.

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    • Abstract:
      The influence of zirconiumon themechanical properties and phase transformationwas investigated in low carbon steel. First, the steels are subjected to a special thermomechanical regime, and the hot rolled plates were used to characterise the tensile properties and impact toughness. Second, the phase transformation behaviour of the steels with various Zr contents was evaluated by both dilatometry and metallography. Finally, to confirm the existence of Zr containing precipitates in the Zr added steels, transmission electron microscopy and energy dispersive spectroscopy were used. It was verified that plenty of fine spherical (Nb,Ti,Zr)C, which is identified to be nearly 10 nm, can be formed when the concentration of Zr is in the range of 0.015-0.030%. The effects of zirconium on the phase transformation, including proeutectoid ferrite and pearlite transformation, andmechanical properties evolution were also identified and discussed. [ABSTRACT FROM AUTHOR]
    • Abstract:
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