Microstructural evolution of massive and allotriomorphic ferrite in an interstitial-free steel subjected to cold-rolling and post-annealing
Journal
Materials Characterization
Journal Volume
223
Start Page
114933
ISSN
1044-5803
Date Issued
2025-05
Author(s)
Yung-An Chen
Shih-Yuan Lu
Chien-Yu Tseng
Tzu-Ching Tsao
Yo-Lun Yang
Chih-Yuan Chen
Jer-Ren Yang
Abstract
Massive ferrite and allotriomorphic ferrite were produced respectively in samples of an interstitial-free steel. Their deformation structures (subjected to 67 % cold-rolling) and corresponding annealing structures (treated by annealing treatment at 600 °C) were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). It was found that the deformed massive ferrite completed recrystallization much faster than the deformed allotriomorphic ferrite did. The yield and ultimate tensile strengths of the fully recrystallized samples of the deformed massive ferrite were much better than those of the deformed allotriomorphic ferrite. The evolution of the annealing structure has been explored and discussed.
Subjects
Annealing
Cold-rolling
Interstitial-free steel
Massive ferrite
Scanning electron microscopy
Scanning transmission electron microscopy (STEM)
Transmission electron microscopy
Publisher
Elsevier BV
Type
journal article