TY - JOUR

T1 - Formation of "carbide-free zones" resulting from the interplay of C redistribution and carbide precipitation during bainitic transformation

AU - Klein, Thomas

AU - Hofer, Christina

AU - Lukas, Marina

AU - Wojcik, Tomasz

AU - Schnitzer, Ronald

AU - Galler, Matthew

AU - Ressel, Gerald

PY - 2019/6/23

Y1 - 2019/6/23

N2 - Advanced bainitic steels exploit their constitution of a phase mixture of bainitic ferrite and retained austenite. The desired microstructures are usually adjusted via isothermal or continuous cooling treatments below the bainite-start-temperature. In the present work, we analyze the microstructural evolution during bainite formation in detail and we report on a novel mechanism for the formation of “carbide-free zones” in the close proximity of austenite. Carbides are formed in the interior of bainitic ferrite, which is isolated from surrounding austenite, while the depletion of C in the vicinity of austenite suppresses their formation.

AB - Advanced bainitic steels exploit their constitution of a phase mixture of bainitic ferrite and retained austenite. The desired microstructures are usually adjusted via isothermal or continuous cooling treatments below the bainite-start-temperature. In the present work, we analyze the microstructural evolution during bainite formation in detail and we report on a novel mechanism for the formation of “carbide-free zones” in the close proximity of austenite. Carbides are formed in the interior of bainitic ferrite, which is isolated from surrounding austenite, while the depletion of C in the vicinity of austenite suppresses their formation.

UR - http://www.scopus.com/inward/record.url?scp=85068039544&partnerID=8YFLogxK

U2 - 10.1016/j.mtla.2019.100380

DO - 10.1016/j.mtla.2019.100380

M3 - Article

VL - 7.2019

JO - Materialia

JF - Materialia

SN - 2589-1529

IS - September

M1 - 100380

ER -