Evolution of microstructure and residual stress during annealing of austenitic and ferritic steels

• Published in: Materials characterization Vol. 112; pp. 238 - 251
• Main Authors: Wawszczak, R., Baczmański, A., Marciszko, M., Wróbel, M., Czeppe, T., Sztwiertnia, K., Braham, C., Berent, K.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.02.2016; Elsevier
• Subjects: ANNEALING; Austenitic stainless steels; AUSTENITIC STEELS; Crystallographic texture; CRYSTALLOGRAPHY; DIFFRACTION METHODS; Engineering Sciences; Evolution; Ferritic stainless steels; FERRITIC STEELS; MATERIALS SCIENCE; MICROSTRUCTURE; NANOSCIENCE AND NANOTECHNOLOGY; NONLINEAR PROBLEMS; PRIMARY RECOVERY; Recovery; RECRYSTALLIZATION; Residual stress; RESIDUAL STRESSES; STACKING FAULTS; Steels; STRESS RELAXATION; X-RAY DIFFRACTION; X-ray diffraction; Residual stresses; Crystallographic texture; Microstructure; Recovery; Recrystallization; Crystallographic texture - Microstructure - Recovery - Recrystallization - Residual stresses - X-ray diffraction
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2015.12.019

In this work the recovery and recrystallization processes occurring in ferritic and austenitic steels were studied. To determine the evolution of residual stresses during material annealing the nonlinear sin2ψ diffraction method was used and an important relaxation of the macrostresses as well as the microstresses was found in the cold rolled samples subjected to heat treatment. Such relaxation occurs at the beginning of recovery, when any changes of microstructure cannot be detected using other experimental techniques. Stress evolution in the annealed steel samples was correlated with the progress of recovery process, which significantly depends on the value of stacking fault energy. •X-ray diffraction was used to determine the first order and second order stresses.•Diffraction data were analyzed using scale transition elastoplastic models model.•Stress relaxation in annealed ferritic and austenitic steels was correlated with evolution of microstructure.•Influence of stacking fault energy on thermally induced processes was discussed.