Dislocation Configurations and Stacking Fault Width in Pure Aluminum at Ambient Temperature: Insights from Analytical Calculations and HRTEM Observations
Analytical calculations and HRTEM observations reveal dislocation structures and stacking fault width in pure aluminum, indicating microstructural stability.
Key Points
This study aims to analyze dislocation configurations and stacking fault width in pure aluminum at ambient temperature using advanced techniques.
Conducted analytical calculations considering line tension, image, and chemical forces to determine stacking fault width.
Utilized high-resolution transmission electron microscopy (HRTEM) to observe dislocation structures in pure aluminum.
Identified dislocation structures such as tangles, walls, and subgrain arrays under minimal strain.
Stacking fault width calculated at 9.43 Å for edge dislocations and 9.49 Å for screw dislocations.
Experimental observations of dislocation structures indicate a dynamic recovery process at strains as low as 0.1%.
Aligned dislocations in IFFT images highlight pure aluminum’s high stacking fault energy, facilitating slip and cross-slip.