AI Article Synopsis
- This study examines how notches and low-cycle fatigue affect the ultimate tensile strength (UTS) and elongation at break in different aluminum alloys (2024-T3, 6061-T4, 7075-T0, etc.) using 120 specimens.
- Specimens were modified with notches via CNC machining, with half also undergoing low-cycle fatigue before tensile testing.
- Results showed that notched and notched-fatigued specimens had significantly lower UTS and elongation at break compared to unnotched ones, indicating that surface integrity is crucial for the strength of aircraft components.
Article Abstract
The influence of notches and fatigue on the ultimate tensile strength and elongation at break of aluminium alloys (2024-T3, 6061-T4, 6061-T4 uncoated, 6061-T6 uncoated, 7075-T0, and 7076-T6) is presented in this study. A total of 120 specimens were used. On all specimens, notches were made using a CNC machine, with 60 of them subjected to low-cycle fatigue (LCF) before undergoing the tensile test. Based on the statistical examination of the measured data, mathematical prediction models have been established. Compared to their unscratched counterparts, the results indicate a significant decrease in the UTS and elongation at break for both notched and notched-fatigued specimens. The LCF pre-treatment contributes to the negative impacts of the notches, resulting in reduced values for the UTS and elongation at break, thus concluding that surface integrity is critical for maintaining the structural strength of aircraft components.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11433727 | PMC |
| http://dx.doi.org/10.3390/ma17184639 | DOI Listing |
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