J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (9): 2107-2114.DOI: 10.1016/j.jmst.2019.04.020
• Orginal Article • Previous Articles Next Articles
Xizhou Kai, Shuoming Huang, Lin Wu, Ran Tao, Yanjie Peng, Zemin Mao, Fei Chen, Guirong Li, Gang Chen, Yutao Zhao*()
Received:
2019-01-03
Revised:
2019-03-27
Accepted:
2019-04-19
Online:
2019-09-20
Published:
2019-07-26
Contact:
Zhao Yutao
About author:
1 These authors contributed equally to this work.
Xizhou Kai, Shuoming Huang, Lin Wu, Ran Tao, Yanjie Peng, Zemin Mao, Fei Chen, Guirong Li, Gang Chen, Yutao Zhao. High strength and high creep resistant ZrB2/Al nanocomposites fabricated by ultrasonic-chemical in-situ reaction[J]. J. Mater. Sci. Technol., 2019, 35(9): 2107-2114.
Materials | Elements (wt%) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Si | Fe | Cu | Mn | Mg | Ti | Zr | B | Al | |
Pure Al | 0.181 | 0.1383 | 0.003 | 0.001 | 0.032 | 0.002 | - | - | Bal. |
1 vol.% ZrB2/Al | 0.193 | 0.1413 | 0.003 | 0.001 | 0.029 | 0.002 | 1.721 | 0.412 | Bal. |
2 vol.% ZrB2/Al | 0.198 | 0.1463 | 0.003 | 0.001 | 0.029 | 0.002 | 3.433 | 0.815 | Bal. |
3 vol.% ZrB2/Al | 0.196 | 0.1533 | 0.003 | 0.001 | 0.027 | 0.002 | 5.151 | 1.224 | Bal. |
5 vol.% ZrB2/Al | 0.213 | 0.1583 | 0.003 | 0.001 | 0.027 | 0.002 | 8.585 | 2.032 | Bal. |
Table 1 Chemical compositions of the fabricated pure Al and ZrB2/Al nanocomposites.
Materials | Elements (wt%) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Si | Fe | Cu | Mn | Mg | Ti | Zr | B | Al | |
Pure Al | 0.181 | 0.1383 | 0.003 | 0.001 | 0.032 | 0.002 | - | - | Bal. |
1 vol.% ZrB2/Al | 0.193 | 0.1413 | 0.003 | 0.001 | 0.029 | 0.002 | 1.721 | 0.412 | Bal. |
2 vol.% ZrB2/Al | 0.198 | 0.1463 | 0.003 | 0.001 | 0.029 | 0.002 | 3.433 | 0.815 | Bal. |
3 vol.% ZrB2/Al | 0.196 | 0.1533 | 0.003 | 0.001 | 0.027 | 0.002 | 5.151 | 1.224 | Bal. |
5 vol.% ZrB2/Al | 0.213 | 0.1583 | 0.003 | 0.001 | 0.027 | 0.002 | 8.585 | 2.032 | Bal. |
Fig. 2. Typical microstructures of the 2 vol.% ZrB2/Al nanocomposites without (a, c, e) and with (b, d, f) ultrasonic vibration treatment: (a, b) OM metallographic images, (c, d) SEM images, (e, f) TEM images, and the insets in (e, f) are the SAED patterns of the corresponding marked areas.
Fig. 4. Room-temperature tensile properties of the fabricated pure Al and ZrB2/Al nanocomposites: (a) tensile curves, (b) work hardening rate vs. true strain, (c) work hardening rate vs. true stress. The inset in (b) shows the normalized work hardening rate vs. true strain.
Materials | YS (MPa) | UTS (MPa) | Elongation | K | Θ0 (MPa) |
---|---|---|---|---|---|
Pure Al | 59 ± 3 | 114 ± 4 | 19.2 ± 2.3 | 26.7 ± 0.5 | 1881.8 ± 66.5 |
1 vol.% ZrB2/Al | 75 ± 2 | 166 ± 5 | 19.5 ± 1.3 | 20.1 ± 0.3 | 2329.2 ± 105.4 |
2 vol.% ZrB2/Al | 108 ± 3 | 203 ± 3 | 23.1 ± 1.6 | 16.7 ± 0.2 | 2480.3 ± 154.6 |
3 vol.% ZrB2/Al | 132 ± 3 | 233 ± 3 | 20.7 ± 2.1 | 14.8 ± 0.1 | 2734.5 ± 148.9 |
5 vol.% ZrB2/Al | 150 ± 5 | 272 ± 3 | 16.4 ± 2.5 | 13.3 ± 0.1 | 2990.5 ± 165.7 |
Table 2 List of the yield strength (YS), ultimate strength (UTS), elongation, and work hardening ability of the fabricated pure Al and ZrB2/Al nanocomposites.
Materials | YS (MPa) | UTS (MPa) | Elongation | K | Θ0 (MPa) |
---|---|---|---|---|---|
Pure Al | 59 ± 3 | 114 ± 4 | 19.2 ± 2.3 | 26.7 ± 0.5 | 1881.8 ± 66.5 |
1 vol.% ZrB2/Al | 75 ± 2 | 166 ± 5 | 19.5 ± 1.3 | 20.1 ± 0.3 | 2329.2 ± 105.4 |
2 vol.% ZrB2/Al | 108 ± 3 | 203 ± 3 | 23.1 ± 1.6 | 16.7 ± 0.2 | 2480.3 ± 154.6 |
3 vol.% ZrB2/Al | 132 ± 3 | 233 ± 3 | 20.7 ± 2.1 | 14.8 ± 0.1 | 2734.5 ± 148.9 |
5 vol.% ZrB2/Al | 150 ± 5 | 272 ± 3 | 16.4 ± 2.5 | 13.3 ± 0.1 | 2990.5 ± 165.7 |
Fig. 6. Creep behaviors of the 2 vol.% ZrB2/Al nanocomposites: (a) creep curves at 523 K, (b) creep rate curves at 523 K, and (c) creep rates under different stresses and temperatures.
Materials | Apparent stress exponent | Apparent activation energy (kJ/mol) | ||||
---|---|---|---|---|---|---|
498 K | 523 K | 548 K | 20 MPa | 25 MPa | 30 MPa | |
1 vol.% ZrB2/Al | 8.39 | 8.19 | 7.78 | 385.39 | 375.43 | 365.05 |
2 vol.% ZrB2/Al | 8.66 | 8.43 | 8.23 | 403.52 | 384.96 | 377.62 |
3 vol.% ZrB2/Al | 9.48 | 8.76 | 8.32 | 411.61 | 393.25 | 383.98 |
5 vol.% ZrB2/Al | 11.77 | 10.53 | 10.16 | 426.76 | 413.61 | 391.22 |
Table 3 Apparent stress exponent and apparent activation energy of the ZrB2/Al nanocomposites.
Materials | Apparent stress exponent | Apparent activation energy (kJ/mol) | ||||
---|---|---|---|---|---|---|
498 K | 523 K | 548 K | 20 MPa | 25 MPa | 30 MPa | |
1 vol.% ZrB2/Al | 8.39 | 8.19 | 7.78 | 385.39 | 375.43 | 365.05 |
2 vol.% ZrB2/Al | 8.66 | 8.43 | 8.23 | 403.52 | 384.96 | 377.62 |
3 vol.% ZrB2/Al | 9.48 | 8.76 | 8.32 | 411.61 | 393.25 | 383.98 |
5 vol.% ZrB2/Al | 11.77 | 10.53 | 10.16 | 426.76 | 413.61 | 391.22 |
Materials | Threshold stress (MPa) | ||
---|---|---|---|
498 K | 523 K | 548 K | |
1 vol.% ZrB2/Al | 9.69 | 9.45 | 8.42 |
2 vol.% ZrB2/Al | 10.39 | 10.25 | 9.93 |
3 vol.% ZrB2/Al | 11.88 | 10.71 | 10.34 |
5 vol.% ZrB2/Al | 14.08 | 12.56 | 11.26 |
Table 4 Threshold stress of the ZrB2/Al nanocomposites.
Materials | Threshold stress (MPa) | ||
---|---|---|---|
498 K | 523 K | 548 K | |
1 vol.% ZrB2/Al | 9.69 | 9.45 | 8.42 |
2 vol.% ZrB2/Al | 10.39 | 10.25 | 9.93 |
3 vol.% ZrB2/Al | 11.88 | 10.71 | 10.34 |
5 vol.% ZrB2/Al | 14.08 | 12.56 | 11.26 |
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