Details
| Original language | English |
|---|---|
| Article number | 113117 |
| Number of pages | 12 |
| Journal | Materials and design |
| Volume | 244 |
| Early online date | 25 Jun 2024 |
| Publication status | Published - Aug 2024 |
Abstract
The fatigue load that a material experiences and its microstructure are important factors influencing fatigue crack propagation behavior. This study employed laser scanning microscopy and electron backscatter diffraction (EBSD) technology, along with fatigue crack propagation experiments, to investigate the fatigue crack propagation behavior of 2024 aluminum alloy under varying stress ratios (R). The results showed that the stress amplitude (σp) was the main factor controlling the fatigue crack propagation life (N). Additionally, detailed characterization of the fatigue crack propagation path was conducted using crystal models and EBSD. A fatigue crack propagation model for 2024 aluminum alloy under different R-values was established based on the grain twist angle and Schmid factor. Finally, the impact of R on the crack tip shielding (Ks) was systematically analyzed, elucidating the intrinsic mapping relationship between R, microstructure, and crack propagation characteristics.
Keywords
- Crack tip shielding, Fatigue crack propagation, Schmid factor, Stress ratio, Twist angle
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials and design, Vol. 244, 113117, 08.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of grain structure on fatigue crack propagation behavior of 2024 aluminum alloy under different stress ratios
AU - Chen, Hongtao
AU - Liu, Shuyao
AU - Wang, Pai
AU - Wang, Xibin
AU - Liu, Zhibing
AU - Aldakheel, Fadi
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/8
Y1 - 2024/8
N2 - The fatigue load that a material experiences and its microstructure are important factors influencing fatigue crack propagation behavior. This study employed laser scanning microscopy and electron backscatter diffraction (EBSD) technology, along with fatigue crack propagation experiments, to investigate the fatigue crack propagation behavior of 2024 aluminum alloy under varying stress ratios (R). The results showed that the stress amplitude (σp) was the main factor controlling the fatigue crack propagation life (N). Additionally, detailed characterization of the fatigue crack propagation path was conducted using crystal models and EBSD. A fatigue crack propagation model for 2024 aluminum alloy under different R-values was established based on the grain twist angle and Schmid factor. Finally, the impact of R on the crack tip shielding (Ks) was systematically analyzed, elucidating the intrinsic mapping relationship between R, microstructure, and crack propagation characteristics.
AB - The fatigue load that a material experiences and its microstructure are important factors influencing fatigue crack propagation behavior. This study employed laser scanning microscopy and electron backscatter diffraction (EBSD) technology, along with fatigue crack propagation experiments, to investigate the fatigue crack propagation behavior of 2024 aluminum alloy under varying stress ratios (R). The results showed that the stress amplitude (σp) was the main factor controlling the fatigue crack propagation life (N). Additionally, detailed characterization of the fatigue crack propagation path was conducted using crystal models and EBSD. A fatigue crack propagation model for 2024 aluminum alloy under different R-values was established based on the grain twist angle and Schmid factor. Finally, the impact of R on the crack tip shielding (Ks) was systematically analyzed, elucidating the intrinsic mapping relationship between R, microstructure, and crack propagation characteristics.
KW - Crack tip shielding
KW - Fatigue crack propagation
KW - Schmid factor
KW - Stress ratio
KW - Twist angle
UR - http://www.scopus.com/inward/record.url?scp=85196809730&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2024.113117
DO - 10.1016/j.matdes.2024.113117
M3 - Article
AN - SCOPUS:85196809730
VL - 244
JO - Materials and design
JF - Materials and design
SN - 0264-1275
M1 - 113117
ER -