Hot dip galvannealed steel sheet

A hot dip galvannealed steel sheet, having a base steel sheet and a plating layer, wherein

• the base steel sheet has a chemical composition containing, by mass %,
• C:
• 0.0005 to 0.0100%,
• Si:
• 0.01 to 0.50%,
• Mn:
• 0.43 to 2.00%,
• P:
• 0.100% or less,
• S:
• 0.0100% or less,
• N:
• 0.0200% or less,
• Ti:
• 0.040 to 0.180%,
• Nb:
• 0 to 0.100%,
• B:
• 0.0005 to 0.0100%,
• Al:
• 0 to 1.000%,
• Cu:
• 0 to 1.000%,
• Cr:
• 0 to 2.000%,
• Ni:
• 0 to 0.500%,
• Mo:
• 0 to 3.000%,
• W:
• 0 to 0.100%,
• V:
• 0 to 1.000%,
• O:
• 0 to 0.020%,
• Ta:
• 0 to 0.100%,
• Co:
• 0 to 3.000%,
• Sn:
• 0 to 1.000%,
• Sb:
• 0 to 0.500%,
• As:
• 0 to 0.050%,
• Mg:
• 0 to 0.050%,
• Zr:
• 0 to 0.050%,
• Ca:
• 0 to 0.0500%,
• REM:
• 0 to 0.0500% and
• a balance of Fe and impurities,
• wherein:
• in a field of observation within a range of 2 mm along a surface direction of the base steel sheet, a cross-section of the base steel sheet vertical to a rolling direction is examined, grain boundary type internal oxides contained in the cross-section within a range of 0.5 μm or more and 5.0 μm or less in a depth direction from a surface of the base steel sheet are identified, and the identified internal oxides are projected on the surface of the base steel sheet,
• a ratio occupied by the internal oxides projected on the surface of the base steel sheet is identified as an “existence ratio ER” of the internal oxides,
• an interval I of adjacent internal oxides is identified based on positions of the internal oxides projected on the surface of the base steel sheet,
• the existence ratio ER of internal oxides is 40% or less, and
• the interval I of internal oxides is 300 μm or more.