The "viscosity" of the material is one thing. But my question is somewhat different: what about cutting hard steel? Of course, there is the issue of lateral displacement and mechanical engineers among us can easily calculate the proportion of energy going laterally in a wedge.
But there is also an issue of hardness and resiliency: can one reasonably expect a superb wootz sword to cut through a substantial steel gun chain several times without being broken? Even a minute angle of contact would redistribute the energy to shatter the blade. Similarly, while we see old steel mails with cuts ( and we do not know whether these were done by an axe), can we expect a wootz blade slice through multiple, hardened rings to effect a " total body" cut?
My suspicion is that there is much more than the quality of steel in the final effect. Also, wootz might have been much keener than regular steel, but it was of no advantage when dealing with real life objects.
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