title: Atomic scale investigation of redistribution of alloying elements in pearlitic steel wires upon cold-drawing and annealing.
abstract: A local electrode atom probe has been employed to analyze the redistribution of alloying elements including Si, Mn, and Cr in pearlitic steel wires upon cold-drawing and subsequent annealing. It has been found that the three elements undergo mechanical mixing upon cold-drawing at large strains, where Mn and Cr exhibit a nearly homogeneous distribution throughout both ferrite and cementite, whereas Si only dissolves slightly in cementite. Annealing at elevated temperatures leads to a reversion of the mechanical alloying. Si atoms mainly segregate at well-defined ferrite (sub)grain boundaries formed during annealing. Cr and Mn are strongly concentrated in cementite adjacent to the ferrite/cementite interface due to their lower diffusivities in cementite than in ferrite.
authors.affiliation: Institut für Materialphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany; Max-Planck Institut für Eisenforschung, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany. Electronic address: y.li@mpie.de.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Choi
authors.forename: S
authors.initials: S
authors.lastname: Goto
authors.forename: C
authors.initials: C
authors.lastname: Borchers
authors.forename: D
authors.initials: D
authors.lastname: Raabe
authors.forename: R
authors.initials: R
authors.lastname: Kirchheim