In situ high-energy X-ray diffraction mapping of Lüders band propagation in medium-Mn transformation-induced plasticity steels
- University of Science and Technology Beijing (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
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. This in situ high-energy X-ray diffraction study unravels two-dimensional distribution of microstructural evolution during Lüders band propagation in medium-Mn TRIP steels.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; Chinese Academy of Sciences (CAS) - State Key Laboratory for Advanced Metals and Materials
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1491803
- Journal Information:
- Materials Research Letters, Vol. 6, Issue 12; ISSN 2166-3831
- Publisher:
- Taylor and FrancisCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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