The Role of Grain Boundary Precipitates during Intergranular Fracture in 6xxx Series Aluminium Alloys
Abstract
:1. Introduction
2. Methods and Models
2.1. Experimental Details
2.2. Computational Details
2.3. Theoretical Background
3. Results and Discussion
3.1. Experimental Observations of Grain Boundary Precipitates
3.2. Bulk Properties of and U2
3.3. Construction of Realistic Interface Models
3.4. Decohesion Energies
3.5. Tensile Tests and Tensile Strength
3.6. Interface Defects
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Unit Cell | Occ | a [Å] | b [Å] | c [Å] | [eV/Atom] |
---|---|---|---|---|---|
fixed | 2/3 | 7.13 | 7.13 | 12.10 | −0.337 |
relaxed | 2/3 | 7.17 | 7.17 | 12.28 | −0.340 |
fixed | 1 | 7.13 | 7.13 | 12.10 | −0.039 |
relaxed | 1 | 7.18 | 7.18 | 13.70 | −0.206 |
U2 relaxed | - | 6.57 | 7.99 | 4.09 | −0.212 |
U2 fixed | - | 6.37 | 8.20 | 4.03 | −0.207 |
Relation | a [Å] | a [Å] | a [Å] |
---|---|---|---|
6.37 | 6.56 | 7.17 | |
14.25 | - | 14.34 |
Decohesion Plane | [GPa] | ||
---|---|---|---|
[eV/Å] | |||
Al (110) | 0.061 | 0.060 | 11.5 |
Al (130) | 0.063 | 0.064 | 12.2 |
U2 (130) | 0.046 | 0.048 | 12.6 |
(110) | 0.070 | 0.072 | 13.7 |
(130) | 0.062 | 0.072 | 12.1 |
(110) A—Al/U2 | 0.045 | 0.043 | 9.4 |
(110) B—U2 | 0.040 | 0.041 | 9.5 |
(110) C— | 0.060 | 0.067 | 12.3 |
(110) D—U2/Al | 0.046 | 0.046 | 11.1 |
(130) A—Al/U2 | 0.058 | 0.055 | 11.5 |
(130) B—U2 | 0.044 | 0.048 | 8.5 |
(130) C— | 0.055 | 0.069 | 10.3 |
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Ringdalen, I.G.; Jensen, I.J.T.; Marioara, C.D.; Friis, J. The Role of Grain Boundary Precipitates during Intergranular Fracture in 6xxx Series Aluminium Alloys. Metals 2021, 11, 894. https://doi.org/10.3390/met11060894
Ringdalen IG, Jensen IJT, Marioara CD, Friis J. The Role of Grain Boundary Precipitates during Intergranular Fracture in 6xxx Series Aluminium Alloys. Metals. 2021; 11(6):894. https://doi.org/10.3390/met11060894
Chicago/Turabian StyleRingdalen, Inga G., Ingvild J. T. Jensen, Calin D. Marioara, and Jesper Friis. 2021. "The Role of Grain Boundary Precipitates during Intergranular Fracture in 6xxx Series Aluminium Alloys" Metals 11, no. 6: 894. https://doi.org/10.3390/met11060894