Member for automobile structure

A member for automobile structure, comprising:

• a base steel sheet, and
• a plating layer covering at least one surface of the base steel sheet,
• wherein the base steel sheet comprises an amount of 0.19 wt % to 0.38 wt % of carbon (C), an amount of 0.5 wt % to 2.0 wt % of manganese (Mn), an amount of 0.001 wt % to 0.005 wt % of boron (B), an amount of 0.03 wt % or less of phosphorus (P), an amount of 0.003 wt % or less of sulfur(S), an amount of 0.1 wt % to 0.6 wt % of silicon (Si), an amount of 0.1 wt % to 0.6 wt % of chromium (Cr), with the balance being iron (Fe) and unavoidable impurities, based on the total weight of the base steel sheet,
• wherein the base steel sheet further comprises at least one element selected from the group consisting of 0.018 wt % or greater and less than 0.049 wt % of titanium (11), 0.015 wt % or greater and less than 0.075 wt % of niobium (Nb), and 0.015 wt % or greater and less than 4.5 wt % of vanadium (V),
• wherein the member for automobile structure has a tensile strength of 1350 MPa or greater and a yield strength of 900 MPa or greater,
• wherein the base steel sheet comprises:
• a martensite phase having an area fraction of 80% or greater;
• an iron-based carbide located inside the martensite phase and having an area fraction of less than 5% based on the martensite phase;
• and
• precipitates distributed inside the base steel sheet, and
• wherein a mismatch dislocation exists at interface between iron and the precipitates of the base steel sheet, and a difference between lattice constants of the iron and the precipitates is less than 25% of the lattice constants of the iron.