Experimental Study on FGH95 Superalloy Turbine Disk Joint Material by Oblique Laser Shock Processing
Abstract
:1. Introduction
2. Objectives and Scope
3. Materials and Methods
3.1. Experimental Materials
3.2. Experimental Treatment and Arrangement
3.3. Index Measurement and Data Processing
4. Result and Discussion
4.1. Variance Analysis
4.2. Range Analysis
- For residual stress and microhardness, the laser energy is larger than the beam diameter, which is larger than number of impacts. The influence of laser energy was very clear and the range of residual stress and microhardness were 27.69 and 31.09, which was much larger than the other two factors, respectively.
- For surface roughness and average grain size, the laser energy is larger than the number of impacts, which is larger than the beam diameter. The influence degree of number of impacts and beam diameter was very close. The range of surface roughness was 2.21 and 1.91, and the range of average grain size was 1.33 and 1.23, respectively.
- For the yield strength, the number of impacts are larger than the laser energy, which is larger than the beam diameter. The number of impacts were very obvious, with a range of 137.67, which was much larger than the other two factors.
4.3. Fracture Morphology Analysis
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Element | Mass Fraction/% | Element | Mass Fraction/% |
---|---|---|---|
Al | 3.400~3.500 | Mn | <0.100 |
W | 3.350~3.450 | Zr | 0.040~0.070 |
Nb | 3.300~3.500 | Ta | <0.050 |
Mo | 3.300~3.480 | Si | 0.050~0.110 |
Ti | 2.500~2.550 | P | <0.110 |
Cr | 12.850~13.070 | S | 0.002~0.003 |
Fe | 0.100~0.370 | C | 0.045~0.067 |
Co | 7.950~8.020 | O | <0.005 |
B | 0.011~0.014 | Ni | Margin |
Level/Factor | Laser Energy/J | Beam Diameter/mm | Number of Impacts/No. |
---|---|---|---|
1 | 4 | 3 | 1 |
2 | 6 | 4 | 2 |
3 | 8 | 5 | 3 |
Test Number/No. | Laser Energy/J | Beam Diameter/mm | Number of Impacts/No. |
---|---|---|---|
1 | 4 | 3 | 1 |
2 | 4 | 4 | 2 |
3 | 4 | 5 | 3 |
4 | 6 | 3 | 2 |
5 | 6 | 4 | 3 |
6 | 6 | 5 | 1 |
7 | 8 | 3 | 3 |
8 | 8 | 4 | 1 |
9 | 8 | 5 | 2 |
10 | Control group (UnOLSP) |
Test Number (No.) | Surface Residual Stress (MPa) | Surface Roughness (μm) | Micro Hardness (HV) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Average Grain Size (μm) |
---|---|---|---|---|---|---|---|
1 | −511.42 | 13.91 | 506.65 | 1677 | 1005 | 35.35 | 11.3 |
2 | −515.49 | 13.96 | 517.77 | 1694 | 1083 | 35.08 | 10.8 |
3 | −508.54 | 13.85 | 497.61 | 1675 | 1178 | 35.29 | 11.5 |
4 | −533.03 | 14.31 | 530.87 | 1706 | 1005 | 35.63 | 9.9 |
5 | −534.48 | 15.16 | 532.42 | 1714 | 1075 | 35.16 | 10.1 |
6 | −508.56 | 10.96 | 502.19 | 1705 | 1007 | 36.3 | 12.5 |
7 | −547.35 | 17.95 | 549.65 | 1816 | 1148 | 34.76 | 8.5 |
8 | −538.67 | 15.46 | 530.58 | 1745 | 976 | 36.41 | 10.3 |
9 | −532.52 | 15.64 | 535.05 | 1748 | 1068 | 35.38 | 9.4 |
10 | −465.97 | 9.94 | 441.26 | 1587 | 971 | 36.61 | 15 |
Factor | Value of Analysis | Surface Residual Stress | Surface Roughness | Micro Hardness | Tensile Strength | Yield Strength | Elongation | Average Grain Size |
---|---|---|---|---|---|---|---|---|
Laser energy | Mean square | 575.42 | 7.21 | 725.75 | 6070.33 | 2696.78 | 0.16 | 2.71 |
F value | 79.22 * | 25.25 * | 36.44 * | 7.88 | 3.36 | 0.80 | 26.85 * | |
Beam diameter | Mean square | 183.98 | 2.91 | 271.50 | 432.33 | 1320.11 | 0.14 | 1.15 |
F value | 25.33 * | 10.18 Δ | 13.63 Δ | 0.56 | 1.64 | 0.69 | 11.42 Δ | |
Number of impacts | Mean square | 88.58 | 3.67 | 199.82 | 543.00 | 14,378.78 | 0.71 | 1.78 |
F value | 12.20 Δ | 12.86 Δ | 10.03 Δ | 0.70 | 17.90 Δ | 3.60 | 17.58 Δ |
Indicator | Factor | |||||||
---|---|---|---|---|---|---|---|---|
Surface residual stress /MPa | Laser energy | −1535.45 | −1576.07 | −1618.54 | −511.82 | −525.36 | −539.51 | 27.69 |
Beam diameter | −1591.80 | −1588.64 | −1549.62 | −530.60 | −529.55 | −516.54 | 14.06 | |
Number of impacts | −1558.65 | −1581.04 | −1590.37 | −519.55 | −527.01 | −530.12 | 10.57 | |
Surface roughness /μm | Laser energy | 41.72 | 40.43 | 49.05 | 13.91 | 13.48 | 16.35 | 2.87 |
Beam diameter | 46.17 | 44.58 | 40.45 | 15.39 | 14.86 | 13.48 | 1.91 | |
Number of impacts | 40.33 | 43.91 | 46.96 | 13.44 | 14.64 | 15.65 | 2.21 | |
Micro hardness /HV | Laser energy | 1522.03 | 1565.48 | 1615.28 | 507.34 | 521.83 | 538.43 | 31.09 |
Beam diameter | 1587.17 | 1580.77 | 1534.85 | 529.06 | 526.92 | 511.62 | 17.44 | |
Number of impacts | 1539.42 | 1583.69 | 1579.68 | 513.14 | 527.90 | 526.56 | 14.76 | |
Yield strength /MPa | Laser energy | 3266.00 | 3087.00 | 3192.00 | 1088.67 | 1029.00 | 1064.00 | 59.67 |
Beam diameter | 3158.00 | 3134.00 | 3253.00 | 1052.67 | 1044.67 | 1084.33 | 39.66 | |
Number of impacts | 2988.00 | 3156.00 | 3401.00 | 996.00 | 1052.00 | 1133.67 | 137.67 | |
Average grain size /μm | Laser energy | 33.60 | 32.50 | 28.20 | 11.20 | 10.83 | 9.40 | 1.80 |
Beam diameter | 29.70 | 31.20 | 33.40 | 9.90 | 10.40 | 11.13 | 1.23 | |
Number of impacts | 34.10 | 30.10 | 30.10 | 11.37 | 10.03 | 10.03 | 1.33 |
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Lin, C.; Yu, L.; Zeng, J.; Wu, H.; Guo, X.; Liu, J.; Zhang, Y. Experimental Study on FGH95 Superalloy Turbine Disk Joint Material by Oblique Laser Shock Processing. Metals 2021, 11, 1770. https://doi.org/10.3390/met11111770
Lin C, Yu L, Zeng J, Wu H, Guo X, Liu J, Zhang Y. Experimental Study on FGH95 Superalloy Turbine Disk Joint Material by Oblique Laser Shock Processing. Metals. 2021; 11(11):1770. https://doi.org/10.3390/met11111770
Chicago/Turabian StyleLin, Chaohui, Longwei Yu, Jingling Zeng, Hebin Wu, Xiaojun Guo, Jianxin Liu, and Yongkang Zhang. 2021. "Experimental Study on FGH95 Superalloy Turbine Disk Joint Material by Oblique Laser Shock Processing" Metals 11, no. 11: 1770. https://doi.org/10.3390/met11111770