Localization of Plastic Deformation in Ti-6Al-4V Alloy
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Flow Stress and Ultimate Elongation before Fracture
3.2. Analysis of the Topology of the Fracture Surface
4. Discussion
5. Conclusions
- (1)
- The formation of shear bands at high strain rates influences the fracture behavior of the Ti-6Al-4V alloy.
- (2)
- The analysis of the fracture surface indicates the activation of a quasi-cleavage mode of fracture at high strain rates in the Ti-6Al-4V alloy.
- (3)
- At relatively low values of stress triaxiality η and at high strain rates, the ultimate strain to fracture appears to change insignificantly.
- (4)
- High stress triaxiality can cause embrittlement of Ti-6Al-4V subjected to high strain rates.
- (5)
- At high strain rates, the Ti-6Al-4V alloy undergoes fracture by cleavage formation followed by coalescence of nucleated microvoids.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Dimensions Afs, µm × µm | Parameter Values | Sa, µm | Sz, µm | Str | Spc, 1/mm | Sdr | Strain Rate, s−1 | Notch Radius of Specimen, mm |
---|---|---|---|---|---|---|---|---|
754.326 × 5422.843 | Max | 93.956 | 548.295 | 0.671 | 10,559.975 | 6.601 | 1000 | Smooth |
Min | 38.599 | 287.055 | 0.514 | 9296.000 | 4.771 | |||
Average | 66.277 | 417.675 | 0.593 | 9927.987 | 5.686 | |||
Std. Dev | 27.678 | 130.620 | 0.078 | 631.987 | 0.9147 | |||
647.931 × 3760.711 | Max | 92.319 | 522.629 | 0.128 | 14,336.275 | 12.67 | 1000 | 10 |
Min | 33.180 | 188.105 | 0.113 | 12,583.356 | 8.555 | |||
Average | 60.055 | 370.053 | 0.118 | 13,613.336 | 10.90 | |||
Std. Dev | 24.443 | 138.139 | 0.007 | 747.836 | 1.730 | |||
614.847 × 3812.108 | Max | 97.991 | 575.645 | 0.387 | 24,276.398 | 29.61 | 1000 | 5 |
Min | 53.723 | 405.401 | 0.080 | 18,001.793 | 18.87 | |||
Average | 75.598 | 511.757 | 0.188 | 21,795.751 | 25.38 | |||
Std. Dev | 18.076 | 75.712 | 0.140 | 2724.733 | 4.669 | |||
308.593 × 3842.977 | Max | 57.030 | 390.964 | 0.062 | 21,810.949 | 25.86 | 1000 | 2.5 |
Min | 31.290 | 215.225 | 0.048 | 15,847.240 | 13.77 | |||
Average | 42.736 | 316.093 | 0.057 | 19,288.885 | 20.88 | |||
Std. Dev | 10.700 | 74.063 | 0.006 | 2520.010 | 5.162 | |||
292.560 × 3819.958 | Max | 261.051 | 979.485 | 0.410 | 21,296.474 | 23.75 | 100 | Smooth |
Min | 201.801 | 817.840 | 0.316 | 17,829.274 | 17.67 | |||
Average | 236.997 | 907.937 | 0.361 | 19,751.918 | 21.11 | |||
Std. Dev | 25.440 | 67.282 | 0.039 | 1440.505 | 2.545 | |||
1367.196 × 3800.668 | Max | 127.772 | 774.560 | 0.470 | 20,955.892 | 24.26 | 100 | 10 |
Min | 111.355 | 648.745 | 0.453 | 17,592.438 | 17.80 | |||
Average | 117.977 | 692.050 | 0.464 | 19,819.734 | 21.96 | |||
Std. Dev | 7.068 | 58.367 | 0.008 | 1575.044 | 2.947 | |||
174.703 × 2609.916 | Max | 255.927 | 964.900 | 0.506 | 22,991.209 | 26.68 | 100 | 5 |
Min | 212.121 | 831.245 | 0.424 | 20,005.690 | 22.05 | |||
Average | 233.770 | 885.752 | 0.472 | 21,783.518 | 24.79 | |||
Std. Dev | 17.887 | 57.279 | 0.035 | 1283.777 | 1.988 | |||
623.559 × 4957.359 | Max | 225.794 | 875.120 | 0.447 | 17,426.704 | 17.47 | 100 | 2.5 |
Min | 104.816 | 631.075 | 0.346 | 15,618.083 | 14.62 | |||
Average | 163.100 | 735.469 | 0.404 | 16,427.935 | 16.11 | |||
Std. Dev | 45.400 | 96.833 | 0.041 | 735.078 | 1.030 |
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Skripnyak, V.V.; Skripnyak, V.A. Localization of Plastic Deformation in Ti-6Al-4V Alloy. Metals 2021, 11, 1745. https://doi.org/10.3390/met11111745
Skripnyak VV, Skripnyak VA. Localization of Plastic Deformation in Ti-6Al-4V Alloy. Metals. 2021; 11(11):1745. https://doi.org/10.3390/met11111745
Chicago/Turabian StyleSkripnyak, Vladimir V., and Vladimir A. Skripnyak. 2021. "Localization of Plastic Deformation in Ti-6Al-4V Alloy" Metals 11, no. 11: 1745. https://doi.org/10.3390/met11111745