Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis
Abstract
:1. Introduction
2. Materials and Methods
3. Modified Williamson-Hall and Warren-Averbach Methods
4. Results and Discussion
4.1. Quantitative Analysis of Dislocation Substructure
4.2. Recovery-Process Modeling
5. Conclusions
- Dislocation-density decrease was confirmed by increasing annealing temperature. In particular, screw-dislocation density remarkably decreased during heating from room temperature to 623 K, while edge-dislocation density gradually decreased as annealing temperature increased.
- Dislocation arrangement parameter and crystallite size hardly changed as annealing temperature increased.
- Changes in hardness during the recovery process mainly depended on edge-dislocation density.
- A new model for the recovery process based on X-ray diffraction line profile analysis was developed. Using the new model, we demonstrated that the decrease in screw-dislocation density during the recovery process was mainly dominated by glide and/or cross-slip with dislocation core diffusion. In contrast, the decrease in edge-dislocation density during the recovery process was dominated by a climbing motion with both dislocation core diffusion and lattice self-diffusion.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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M | α | E (Pa) | vD (s−1) | kB (J·K−1) | b (m) |
---|---|---|---|---|---|
2 | 0.3 | 2.05 × 1011 | 9.79 × 1012 | 1.38 × 10−23 | 2.5 × 10−10 |
ρ | Edge Dislocation Density | Screw Dislocation Density |
---|---|---|
Activation energy (kJ·mol−1) | 186 | 167 |
Activation volume (m3) | 5.60 × 1028 | 1.98 × 1028 |
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Sugiyama, S.; Ogawa, T.; He, L.; Wang, Z.; Adachi, Y. Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis. Materials 2021, 14, 895. https://doi.org/10.3390/ma14040895
Sugiyama S, Ogawa T, He L, Wang Z, Adachi Y. Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis. Materials. 2021; 14(4):895. https://doi.org/10.3390/ma14040895
Chicago/Turabian StyleSugiyama, Shota, Toshio Ogawa, Lei He, Zhilei Wang, and Yoshitaka Adachi. 2021. "Quantitative Analysis of the Recovery Process in Pure Iron Using X-ray Diffraction Line Profile Analysis" Materials 14, no. 4: 895. https://doi.org/10.3390/ma14040895