J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (12): 2316-2324.DOI: 10.1016/j.jmst.2018.05.011
• Orginal Article • Previous Articles Next Articles
Jian Fenga, Bing Yea*(), Lijie Zuoa, Ruijuan Qib*(), Qudong Wanga, Haiyan Jianga, Rong Huangb, Wenjiang Dinga, Jie Yaoc, Chuntao Wangc
Received:
2018-01-19
Revised:
2018-04-06
Accepted:
2018-04-25
Online:
2018-12-20
Published:
2018-11-15
Contact:
Ye Bing,Qi Ruijuan
Jian Feng, Bing Ye, Lijie Zuo, Ruijuan Qi, Qudong Wang, Haiyan Jiang, Rong Huang, Wenjiang Ding, Jie Yao, Chuntao Wang. Effects of Zr, Ti and Sc additions on the microstructure and mechanical properties of Al-0.4Cu-0.14Si-0.05Mg-0.2Fe alloys[J]. J. Mater. Sci. Technol., 2018, 34(12): 2316-2324.
Alloys | Cu | Si | Mg | Zr | Ti | Sc | Fe | Al |
---|---|---|---|---|---|---|---|---|
Base | 0.41 | 0.13 | 0.02 | 0.18 | Bal. | |||
Base + Zr (BZ) | 0.39 | 0.12 | 0.02 | 0.18 | 0.19 | Bal. | ||
Base + ZrTi (BZT) | 0.38 | 0.13 | 0.03 | 0.18 | 0.19 | 0.17 | Bal. | |
Base + ZrTiSc (BZTS) | 0.41 | 0.13 | 0.02 | 0.17 | 0.17 | 0.17 | 0.18 | Bal. |
Table 1 Chemical composition of the studied alloys (wt.%).
Alloys | Cu | Si | Mg | Zr | Ti | Sc | Fe | Al |
---|---|---|---|---|---|---|---|---|
Base | 0.41 | 0.13 | 0.02 | 0.18 | Bal. | |||
Base + Zr (BZ) | 0.39 | 0.12 | 0.02 | 0.18 | 0.19 | Bal. | ||
Base + ZrTi (BZT) | 0.38 | 0.13 | 0.03 | 0.18 | 0.19 | 0.17 | Bal. | |
Base + ZrTiSc (BZTS) | 0.41 | 0.13 | 0.02 | 0.17 | 0.17 | 0.17 | 0.18 | Bal. |
Point | Al | Fe | Si | Cu | Mg | Ti | Zr |
---|---|---|---|---|---|---|---|
1 | 67.0 | 1.1 | 20 | 3.7 | 6.1 | - | 2.1 |
2 | 77.6 | 7.9 | 12.9 | 2.6 | - | - | - |
3 | 87.8 | 4.4 | 7.0 | 0.8 | - | - | - |
4 | 86.1 | 3.2 | 4.4 | 6.3 | - | - | - |
5 | 88.6 | 6.4 | 3.6 | 1.4 | - | - | - |
6 | 88.9 | 5.9 | 3.8 | 1.5 | - | - | - |
7 | 89.6 | - | - | 0.6 | 2.8 | 7.0 | - |
8 | 99.5 | - | - | 0.3 | - | 0.2 | 0.1 |
Table 2 EDS results for the corresponding points in Fig. 3 (at.%).
Point | Al | Fe | Si | Cu | Mg | Ti | Zr |
---|---|---|---|---|---|---|---|
1 | 67.0 | 1.1 | 20 | 3.7 | 6.1 | - | 2.1 |
2 | 77.6 | 7.9 | 12.9 | 2.6 | - | - | - |
3 | 87.8 | 4.4 | 7.0 | 0.8 | - | - | - |
4 | 86.1 | 3.2 | 4.4 | 6.3 | - | - | - |
5 | 88.6 | 6.4 | 3.6 | 1.4 | - | - | - |
6 | 88.9 | 5.9 | 3.8 | 1.5 | - | - | - |
7 | 89.6 | - | - | 0.6 | 2.8 | 7.0 | - |
8 | 99.5 | - | - | 0.3 | - | 0.2 | 0.1 |
Point | Al | Fe | Si | Cu | Sc |
---|---|---|---|---|---|
9 | 88.6 | - | - | 0.6 | 10.8 |
10 | 85.6 | 7.1 | 4.8 | 2.2 | 0.3 |
11 | 75.1 | 0.2 | 4.2 | 19.8 | 0.7 |
12 | 87.5 | 6.3 | 3.6 | 2.0 | 0.7 |
13 | 91.5 | 3.9 | 2.9 | 1.5 | 0.3 |
14 | 89.9 | 5.0 | 3.4 | 1.7 | 0.1 |
15 | 98.2 | 0.7 | - | 1.0 | 0.1 |
Table 3 EDS results for the corresponding points in Fig. 4 (at.%).
Point | Al | Fe | Si | Cu | Sc |
---|---|---|---|---|---|
9 | 88.6 | - | - | 0.6 | 10.8 |
10 | 85.6 | 7.1 | 4.8 | 2.2 | 0.3 |
11 | 75.1 | 0.2 | 4.2 | 19.8 | 0.7 |
12 | 87.5 | 6.3 | 3.6 | 2.0 | 0.7 |
13 | 91.5 | 3.9 | 2.9 | 1.5 | 0.3 |
14 | 89.9 | 5.0 | 3.4 | 1.7 | 0.1 |
15 | 98.2 | 0.7 | - | 1.0 | 0.1 |
Fig. 5. TEM images for the base alloy: (a) bright field image, (b) SAED pattern of [011]Al, (c) HRTEM image along the projection of [011]Al, (d) STEM image along [011]Al and EDS results of the corresponding area.
Fig. 7. TEM images for the base alloy modified with 0.2%Zr + 0.2%Ti + 0.2%Sc: (a) bright field image, (b, c) HRTEM image along the projection of [011]Al, (d) STEM bright field image along [011]Al and EDS results of the corresponding area.
Fig. 9. Mechanical properties evolution for the studied alloys: (a) microhardness evolution at 350 °C for 200 h, (b) tensile curves in as-cast state, (c) after holding at 350 °C for 200 h.
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