Related Experiment Video
Updated: Aug 5, 2026

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
Published on: September 11, 2018
Influence of Aging Precipitation Kinetics on Mechanical Properties and Corrosion Behavior of the Al-1.1Cu-2.4Li-X
Danyang Liu1, Hao Cheng1, Huabo Gu2
1School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Abstract:
The mechanical properties, intergranular corrosion, and exfoliation corrosion of T6- and T8-aged Al-1.1Cu-2.4Li-X alloys (high Li content, Cu/Li ratio ≈ 0.46) were systematically examined. Microstructural analysis shows that T8 aging produces a higher number density of T1 (Al2CuLi) precipitates and a higher number density, as well as a finer and more uniform distribution of δ' (Al3Li) compared to T6 aging. This results in yield and tensile strengths that are 90 MPa and 40 MPa higher, respectively, for the T8 condition. In terms of corrosion, the T6-aged alloy displays intergranular corrosion depths of 176.5-210.1 μm, while the T8-aged alloy exhibits much shallower depths of 67.2-95.8 μm. The inferior resistance to intergranular and exfoliation corrosion in the T6 temper is attributed to precipitation-free zones (PFZs) and secondary-phase particles at grain boundaries. Increasing T6's aging time reduces the PFZ width and thus improves corrosion resistance. Conversely, prolonged T8 aging causes a gradual decrease in corrosion potential and an increase in corrosion current density, linked to a higher density of T1 precipitates, which signifies increased corrosion susceptibility. These findings provide a reference for understanding corrosion mechanisms and improving the corrosion resistance of high-Li Al-Li alloys.
More Related Videos
Related Concept Videos
Corrosion of Reinforcement
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
Corrosion
Microbial Corrosion
Fatigue
Precipitation Processes
Mechanical Characteristics of Steel
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...

