Hello All,
I would recomend this article by Kevin Cashen:
http://swordforum.com/forge/roadtodamascus.html
Kevin is a talented smith with a genuine interest in history and science.
I would also recommend this PDF file:
"Metallurgy of Steel for Bladesmiths & Others who Heat Treat and Forge Steel", 200 + pages, By John D. Verhoeven Emeritus Professor, Iowa State University, March 2005
http://mse.iastate.edu/files/verhoeven/7-5.pdf
It is a large file of 8.1 Megs
Perhapse the best publication on the subject of steel and blades.
Ric