J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (8): 1543-1554.DOI: 10.1016/j.jmst.2019.04.002
• Orginal Article • Previous Articles Next Articles
Mingrun Yuab, Hongyun Zhaob, Zhihua Jiangb, Zili Zhangb, Fei Xub, Li Zhouab*(), Xiaoguo Songab
Received:
2018-12-13
Revised:
2019-03-08
Accepted:
2019-03-09
Online:
2019-08-05
Published:
2019-06-19
Contact:
Zhou Li
About author:
1 These authors contributed equally to this work.
Mingrun Yu, Hongyun Zhao, Zhihua Jiang, Zili Zhang, Fei Xu, Li Zhou, Xiaoguo Song. Influence of welding parameters on interface evolution and mechanical properties of FSW Al/Ti lap joints[J]. J. Mater. Sci. Technol., 2019, 35(8): 1543-1554.
Elements | |||||||
---|---|---|---|---|---|---|---|
Al | Mg | Si | Mn | Ti | V | Fe. | |
AA6061 | Bal. | 1.61 | 0.50 | 0.15 | - | - | - |
Ti6Al4V | 6.33 | - | - | - | Bal. | 4.27 | 0.20 |
Table 1 Chemical compositions of the base materials (wt%).
Elements | |||||||
---|---|---|---|---|---|---|---|
Al | Mg | Si | Mn | Ti | V | Fe. | |
AA6061 | Bal. | 1.61 | 0.50 | 0.15 | - | - | - |
Ti6Al4V | 6.33 | - | - | - | Bal. | 4.27 | 0.20 |
Rotational rate (rpm) | Traversing rate (mm/min) | Tilting angle (deg.) |
---|---|---|
600 | 100 | 3 |
800 | ||
1000 | ||
1200 | ||
1400 | ||
1000 | 60 | |
80 | ||
120 | ||
140 |
Table 2 Detailed welding parameters for FSW Al/Ti lap joints.
Rotational rate (rpm) | Traversing rate (mm/min) | Tilting angle (deg.) |
---|---|---|
600 | 100 | 3 |
800 | ||
1000 | ||
1200 | ||
1400 | ||
1000 | 60 | |
80 | ||
120 | ||
140 |
Points | Al | Ti | V | Mg | Possible phase |
---|---|---|---|---|---|
A | 96.15 | 2.02 | - | 1.83 | Al + TiAl3 |
B | 11.23 | 85.70 | 3.07 | - | Ti BM |
C | 94.99 | 3.10 | 0.89 | 1.02 | Al + TiAl3 |
D | 70.26 | 28.88 | 0.86 | 0.70 | TiAl3 |
E | 51.81 | 46.57 | 1.35 | 0.27 | TiAl |
Table 3 EDS results of the points shown in Fig.9 (at.%).
Points | Al | Ti | V | Mg | Possible phase |
---|---|---|---|---|---|
A | 96.15 | 2.02 | - | 1.83 | Al + TiAl3 |
B | 11.23 | 85.70 | 3.07 | - | Ti BM |
C | 94.99 | 3.10 | 0.89 | 1.02 | Al + TiAl3 |
D | 70.26 | 28.88 | 0.86 | 0.70 | TiAl3 |
E | 51.81 | 46.57 | 1.35 | 0.27 | TiAl |
Fig. 11. TEM results of Al/Ti interfaces: (a) TEM image of the diffusion layer, (b) TEM image of the mixed interface, (c) SAED pattern of the TiAl3 in (a), (d) SAED pattern of the TiAl in (b).
Fig. 13. Tensile test results of the Al/Ti lap joints obtained under different welding conditions: (a) variation of lap shear strength with rotational rate, (b) variation of lap shear strength with rotational rate, (c) variation of lap shear strength with ω2/v, (d) comparison with former studies.
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