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- Title
In situ high-energy X-ray diffraction mapping of Lüders band propagation in medium-Mn transformation-induced plasticity steels.
- Authors
Zhang, Minghe; Li, Runguang; Ding, Jie; Chen, Haiyang; Park, Jun-Sang; Almer, Jonathan; Wang, Yan-Dong
- Abstract
Two-dimensional distributions of microstructural characteristics of austenite (γ) around the Lüders band in medium-Mn transformation-induced plasticity (TRIP) steel were revealed by in situ high-energy X-ray diffraction. Lüders band propagation leads to significant changes in the volume fraction and lattice strains of austenite. The evolution of the lattice strain of γ-311 accords well with the true yield behavior model and is used to estimate the angle of the Lüders band front with respect to the tensile axis. The modified Williamson-Hall analysis shows that the dislocation density in austenite increased from 7 × 1014 m−2 to 1.5 × 1015 m−2 after Lüders band propagation.
- Subjects
X-ray diffraction; LUDERS bands; TRANSFORMATION induced plasticity steel; AUSTENITE; DEFORMATIONS (Mechanics)
- Publication
Materials Research Letters, 2018, Vol 6, Issue 12, p662
- ISSN
2166-3831
- Publication type
Academic Journal
- DOI
10.1080/21663831.2018.1530698