High-strength hot-dip galvanized steel sheet and method for manufacturing the same (as amended)

A high-strength hot-dip galvanized steel sheet having a chemical composition comprising, in mass %, C:

• 0.13 to 0.25%, Si:
• 0.01 to 1.00%, Mn:
• 1.5 to 4.0%, P:
• 0.100% or less, S:
• 0.02% or less, Al:
• 0.01 to 1.50%, N:
• 0.001 to 0.010%, Ti:
• 0.005 to 0.100%, and B:
• 0.0005 to 0.0050%, with the balance being Fe and inevitable impurities, the content of Ti and the content of N satisfying formula (1) below, and
• the high-strength hot-dip galvanized steel sheet having a microstructure including martensite at an area fraction of 60% or more and 90% or less, polygonal ferrite at an area fraction of more than 5% and 40% or less, and retained austenite at an area fraction of less than 3% (including 0%), wherein the martensite has an average hardness of 450 or more and 600 or less in terms of Vickers hardness, wherein the martensite has an average crystal grain diameter of 10 μm or less, and wherein the standard deviation of crystal grain diameters of the martensite is 4.0 μm or less:
• [Ti]>4[N] (1),
• where [Ti] represents the content of Ti (mass %), and [N] represents the content of N (mass %).