Multiscale microstructural evolution in cold drawn pearlitic steel: A Palimpsestus Approach and a Tribute to Raffaello

摘要

This paper offers a palimpsestus approach to the multiscale microstructural evolution in progressively cold drawn pearlitic steel, analyzing in particular the evolution with cold drawing of: (i) the prior austenitic grain (zero, or virtual, microstructural level); (ii) the pearlitic colony (first microstructural level); (iii) the pearlite lamellae (second microstructural level). Results demonstrate that the slender pearlitic colony (after cold drawing) -more than the prior austenitic grain (that is also virtually cold drawn in the palimpsestus approach)- is the microstructural unit governing the cleavage facet size.