| Autor: |
Yan, Zhengwei, Shi, Shujing, Sang, Peng, Zhang, Zan, Li, Kaiyue, Zhao, Weijin, Li, Yongsheng |
| Předmět: |
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| Zdroj: |
Journal of Materials Engineering & Performance; Jul2024, Vol. 33 Issue 14, p6857-6869, 13p |
| Abstrakt: |
Point defects and dislocation can be induced in dual-phase stainless steels in the circumstance of irradiation. These defects affect the phase separation and the morphology evolution of Fe-Cr based alloys, increasing the hardening and damage of alloys. The influence of dislocation on the evolution of Cr-enriched α′ nanophase accompanying the vacancy and interstitial atoms is studied by the multi-phase-field model. Multi-dislocation loops are introduced to investigate the dragging effect of dislocation stress field on the solute atoms, and the dragging effect of solute atoms on the point defects. Tensile stress of dislocation drags the Cr atoms to accelerate the local phase separation, and the migration of Cr atoms drags the vacancies to form a two-dimensional vacancy loop around the α/α′ phase boundary. Large diffusion potential difference drives the atomic diffusion rapidly and accelerates the growth and coarsening of the α′ phase. The superposition of tensile and compressive stress field of multi-dislocation loops makes the redissolution of the α′ phase. The multi-interactions of stress–atoms–point defects are clearly presented in this work, and the dynamic effects are clarified for the dragging on solute atoms and point defects under dislocation stress. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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