J. Mater. Sci. Technol. ›› 2020, Vol. 39: 74-81.DOI: 10.1016/j.jmst.2019.08.025
• Research Article • Previous Articles Next Articles
Fenghua Wangad, Miaolin Fengb, Yanyao Jiangc, Jie Donga*(), Zhenyan Zhangad
Received:
2019-06-18
Revised:
2019-08-01
Accepted:
2019-08-12
Published:
2020-02-15
Online:
2020-03-11
Contact:
Dong Jie
Fenghua Wang, Miaolin Feng, Yanyao Jiang, Jie Dong, Zhenyan Zhang. Cyclic shear deformation and fatigue of extruded Mg-Gd-Y magnesium alloy[J]. J. Mater. Sci. Technol., 2020, 39: 74-81.
Fig. 1. Initial microstructure and texture of extruded GW83 alloys: (a) three-dimensional microstructure, (b) (0002) and {10-10} pole figures on the RD-TD plane.
Fig. 4. Variation of shear stress amplitude with number of loading cycles under shear strain amplitudes from 0.606% to 2.425% for extruded GW83 alloy.
Spec ID | Δγ/2 (%) | Δεeq/2 (%) | Δτ/2 (MPa) | τm (MPa) | ΔWp (MJ/m3) | Nf |
---|---|---|---|---|---|---|
83IITU30 | 4.157 | 2.4 | 135.8 | 0.42 | -- | 39 |
83IITU35 | 2.915 | 1.68 | 128.3 | 0.34 | -- | 78 |
83IITU23 | 2.425 | 1.4 | 123.5 | 0.42 | 4.389 | 175 |
83IITU36 | 2.078 | 1.2 | 119.2 | 0.46 | 3.233 | 382 |
83IITU27 | 1.905 | 1.1 | 116.7 | 0.21 | 2.714 | 583 |
83IITU17 | 1.732 | 1.0 | 110.9 | 0.17 | 2.060 | 2,275 |
83IITU28 | 1.472 | 0.85 | 99.9 | 0.12 | 1.396 | 5,083 |
83IITU22 | 1.212 | 0.7 | 97.1 | -0.05 | 0.916 | 14,700 |
83IITU20 | 1.040 | 0.6 | 93.2 | 0.35 | 0.680 | 27,780 |
83IITU21 | 0.866 | 0.5 | 92.3 | 0.71 | 0.400 | 47,000 |
83IITU18 | 0.693 | 0.4 | 83.9 | 0.22 | 0.213 | 149,653 |
83IITU31 | 0.606 | 0.35 | 79.2 | -1.04 | 0.105 | 630,619 |
Table 1 Shear fatigue results for extruded GW83 alloy obtained from free end torsion experiments.
Spec ID | Δγ/2 (%) | Δεeq/2 (%) | Δτ/2 (MPa) | τm (MPa) | ΔWp (MJ/m3) | Nf |
---|---|---|---|---|---|---|
83IITU30 | 4.157 | 2.4 | 135.8 | 0.42 | -- | 39 |
83IITU35 | 2.915 | 1.68 | 128.3 | 0.34 | -- | 78 |
83IITU23 | 2.425 | 1.4 | 123.5 | 0.42 | 4.389 | 175 |
83IITU36 | 2.078 | 1.2 | 119.2 | 0.46 | 3.233 | 382 |
83IITU27 | 1.905 | 1.1 | 116.7 | 0.21 | 2.714 | 583 |
83IITU17 | 1.732 | 1.0 | 110.9 | 0.17 | 2.060 | 2,275 |
83IITU28 | 1.472 | 0.85 | 99.9 | 0.12 | 1.396 | 5,083 |
83IITU22 | 1.212 | 0.7 | 97.1 | -0.05 | 0.916 | 14,700 |
83IITU20 | 1.040 | 0.6 | 93.2 | 0.35 | 0.680 | 27,780 |
83IITU21 | 0.866 | 0.5 | 92.3 | 0.71 | 0.400 | 47,000 |
83IITU18 | 0.693 | 0.4 | 83.9 | 0.22 | 0.213 | 149,653 |
83IITU31 | 0.606 | 0.35 | 79.2 | -1.04 | 0.105 | 630,619 |
Fig. 8. Extension {10-12} twins in extruded GW83 alloy after cyclic torsion at shear strain amplitudes of (a) Δγ/2 = 0.693%; (b) Δγ/2 = 4.157%. The grain orientations and shear planes corresponding to the parent grains and extension twins were added in the figure.
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