Determination of Plastic Anisotropy of Extruded 7075 Aluminum Alloy Thick Plate for Simulation of Post-Extrusion Forming
Abstract
:1. Introduction
2. Evaluation of Local Anisotropy for Extruded Plate
2.1. Description of Examined Material
2.2. Lankford’s Value and Hill’s Quadratic Yield Criterion
2.3. Small-Cube Compression Test
2.4. Results of Small-Cube Compression Test
2.5. Local Anisotropy for Extruded Plate
3. Influence of Plastic Anisotropy on Bulk Forming
4. Simulation of Thick Plate Upsetting
4.1. FE Modeling of Cube Specimens Considering Plastic Anisotropy
4.2. FE Analysis Considering Plastic Anisotropy
5. Conclusions
- It was confirmed that the extruded 7075 aluminum alloy plate had a local plasticity anisotropy not only in the extrusion and transverse directions but also in the thickness direction through the small-cube compression test.
- Both the barreling phenomenon and asymmetric deformation behavior were shown in the case of the compression test using the extruded materials. The deformation behaviors of extruded plates were accurately simulated through finite element analysis reflecting Hill’s anisotropy coefficients depending on each position and direction.
- When considering the production of parts through plastic working, such as forging from the extruded material for weight reduction, the finite element analysis reflecting the local plastic isotropy is necessary for accurate process simulation.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Position | Value | |||||
---|---|---|---|---|---|---|
Top layer | ||||||
0.40 | 0.33 | 0.34 | ||||
0.35 | 0.42 | 0.46 | ||||
r-value | 1.14 | r-value | 0.79 | r-value | 0.74 | |
0.46 | 0.44 | 0.44 | ||||
0.34 | 0.29 | 0.30 | ||||
r-value | 1.35 | r-value | 1.52 | r-value | 1.47 | |
0.30 | 0.33 | 0.35 | ||||
0.44 | 0.40 | 0.40 | ||||
r-value | 0.68 | r-value | 0.83 | r-value | 0.88 | |
Intermediate layer | ||||||
0.40 | 0.35 | 0.33 | ||||
0.36 | 0.41 | 0.45 | ||||
r-value | 1.11 | r-value | 0.85 | r-value | 0.73 | |
0.45 | 0.42 | 0.46 | ||||
0.33 | 0.29 | 0.31 | ||||
r-value | 1.36 | r-value | 1.45 | r-value | 1.48 | |
0.31 | 0.32 | 0.36 | ||||
0.46 | 0.43 | 0.40 | ||||
r-value | 0.67 | r-value | 0.74 | r-value | 0.90 | |
Central layer | ||||||
0.40 | 0.34 | 0.33 | ||||
0.39 | 0.41 | 0.42 | ||||
r-value | 1.03 | r-value | 0.83 | r-value | 0.79 | |
0.42 | 0.41 | 0.45 | ||||
0.33 | 0.28 | 0.29 | ||||
r-value | 1.27 | r-value | 1.46 | r-value | 1.54 | |
0.29 | 0.33 | 0.39 | ||||
0.45 | 0.46 | 0.40 | ||||
r-value | 0.65 | r-value | 0.72 | r-value | 0.98 |
Position | F | G | H | L | M | N | C |
---|---|---|---|---|---|---|---|
Top layer | 0.88 | 1.28 | 0.77 | 2.43 | 3.31 | 2.65 | |
Intermediate layer | 0.86 | 1.27 | 0.77 | 2.59 | 3.17 | 2.49 | |
Central layer | 0.80 | 1.23 | 0.78 | 2.63 | 3.11 | 2.43 |
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Jung, D.-K.; Ha, S.-H.; Kim, H.-K.; Shin, Y.-C. Determination of Plastic Anisotropy of Extruded 7075 Aluminum Alloy Thick Plate for Simulation of Post-Extrusion Forming. Metals 2021, 11, 641. https://doi.org/10.3390/met11040641
Jung D-K, Ha S-H, Kim H-K, Shin Y-C. Determination of Plastic Anisotropy of Extruded 7075 Aluminum Alloy Thick Plate for Simulation of Post-Extrusion Forming. Metals. 2021; 11(4):641. https://doi.org/10.3390/met11040641
Chicago/Turabian StyleJung, Dae-Kwan, Seong-Ho Ha, Heung-Kyu Kim, and Young-Chul Shin. 2021. "Determination of Plastic Anisotropy of Extruded 7075 Aluminum Alloy Thick Plate for Simulation of Post-Extrusion Forming" Metals 11, no. 4: 641. https://doi.org/10.3390/met11040641