J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (10): 1843-1850.DOI: 10.1016/j.jmst.2018.02.008
Special Issue: Graphene 2018
• Orginal Article • Previous Articles Next Articles
Duo Liuab, Yanyu Songb, Bin Shib, Qi Zhangb, Xiaoguo Songab(), Hongwei Niub, Jicai Fengab
Received:
2017-11-15
Revised:
2017-12-15
Accepted:
2017-12-27
Online:
2018-10-05
Published:
2018-11-01
Duo Liu, Yanyu Song, Bin Shi, Qi Zhang, Xiaoguo Song, Hongwei Niu, Jicai Feng. Vacuum brazing of GH99 superalloy using graphene reinforced BNi-2 composite filler[J]. J. Mater. Sci. Technol., 2018, 34(10): 1843-1850.
Cr | Co | W | Mo | Si | B | Fe | Al | Ti | Ni | |
---|---|---|---|---|---|---|---|---|---|---|
GH99 superalloy | 18.21 | 6.67 | 8.03 | 2.86 | - | - | 0.32 | 1.15 | 1.43 | Bal. |
BNi-2 | 7.06 | - | - | - | 4.54 | 2.85 | 3.04 | - | - | Bal. |
Table 1 Chemical compositions of GH99 superalloy and BNi-2 (wt%).
Cr | Co | W | Mo | Si | B | Fe | Al | Ti | Ni | |
---|---|---|---|---|---|---|---|---|---|---|
GH99 superalloy | 18.21 | 6.67 | 8.03 | 2.86 | - | - | 0.32 | 1.15 | 1.43 | Bal. |
BNi-2 | 7.06 | - | - | - | 4.54 | 2.85 | 3.04 | - | - | Bal. |
Spot | Ni | Cr | Si | Mo | W | Fe | Other element |
---|---|---|---|---|---|---|---|
A | 71.27 | 14.32 | 4.42 | 0.54 | 1.15 | 2.56 | 5.74 |
B | 11.62 | 46.34 | 0.01 | 25.21 | 14.28 | 1.53 | 1.01 |
C | 23.85 | 40.90 | - | 19.15 | 12.94 | 2.04 | 1.12 |
Table 2 Chemical compositions at each spot shown in Fig. 3 (at.%).
Spot | Ni | Cr | Si | Mo | W | Fe | Other element |
---|---|---|---|---|---|---|---|
A | 71.27 | 14.32 | 4.42 | 0.54 | 1.15 | 2.56 | 5.74 |
B | 11.62 | 46.34 | 0.01 | 25.21 | 14.28 | 1.53 | 1.01 |
C | 23.85 | 40.90 | - | 19.15 | 12.94 | 2.04 | 1.12 |
Fig. 7. EBSD analysis of grain morphologies (a, b) and distribution of grain size (c, d) of base metal before (a, c) and after (b, d) 1200 °C/30 min brazing process.
Fig. 10. Schematic diagram of interfacial microstructure: (a) formation of liquid phase; (b) spreading of liquid phase; (c) isothermal solidification; (d) formation of interface.
Fig. 12. Fracture morphologies of joints brazed with BNi-2 filler (a, b) and BNi-2G composite filler (c, d) at low (a, c) and high (b, d) magnification.
Spot | Ni | Cr | Si | Mo | W | Co | Fe | Other element |
---|---|---|---|---|---|---|---|---|
A | 46.20 | 28.59 | 1.30 | 6.58 | 5.27 | 5.69 | 1.16 | 5.21 |
B | 76.07 | 9.52 | 6.79 | 0.31 | 0.92 | 2.51 | 1.91 | 1.97 |
Table 3 Chemical compositions at each spot shown in Fig. 12 (at.%).
Spot | Ni | Cr | Si | Mo | W | Co | Fe | Other element |
---|---|---|---|---|---|---|---|---|
A | 46.20 | 28.59 | 1.30 | 6.58 | 5.27 | 5.69 | 1.16 | 5.21 |
B | 76.07 | 9.52 | 6.79 | 0.31 | 0.92 | 2.51 | 1.91 | 1.97 |
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