Hi
Journal of the history of Arabic science vol 1, 1978 pg 3-30
" Metallographic examination of Two Damascene steel blades
by Jerzy Piaskowski
two swords had strips of carbides in a sorbitic matrix ( sorbite being highly tempered martensite.. )
and theres two more
one study by H. Maryon on a dagger... and another by C. Panseri on 2 swords.
-- both conclude cementite strips in a sorbite matrix
just some reading
Greg