Abstract
High-strength seismic reinforcing bars (rebars) reduce seismic damages by achieving low yield ratios. The effect of adding Mo to high-strength Tempcore rebars for achieving low yield ratios was investigated. The continuous cooling transformation diagram shifted with Mo addition to achieve higher hardenability, thereby producing a low-temperature transformed phase, inside the rebar. The work-hardening exponent increased with increasing Mo content, which was due to the fine grain size of the low-temperature transformed phase and its high dislocation density. The addition of 0.11 wt% Mo provided a feasible solute drag effect for constructional steels and achieved high strength and excellent seismic resistance.
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