Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (6): 771-779.DOI: 10.1007/s40195-018-0815-4
Special Issue: 2018-2019高温合金专辑
• Orginal Article • Previous Articles Next Articles
Xin-Tong Lian1,2, Wen-Ru Sun1(), Xin Xin1, Fang Liu1, Dan-Dan Zheng1
Received:
2018-07-03
Revised:
2018-08-02
Online:
2019-06-10
Published:
2019-06-17
Xin-Tong Lian, Wen-Ru Sun, Xin Xin, Fang Liu, Dan-Dan Zheng. Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(6): 771-779.
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Alloy no. | Fe | P | Cr | C | Ni |
---|---|---|---|---|---|
1 | 15.2 | 0.025 | 17.17 | 0.039 | Bal. |
2 | 30.5 | 0.025 | 17.11 | 0.040 | Bal. |
3 | 45.1 | 0.024 | 17.14 | 0.044 | Bal. |
4 | 60.7 | 0.026 | 17.17 | 0.041 | Bal. |
Table 1 Chemical compositions of different Ni-Cr-Fe alloys (wt%)
Alloy no. | Fe | P | Cr | C | Ni |
---|---|---|---|---|---|
1 | 15.2 | 0.025 | 17.17 | 0.039 | Bal. |
2 | 30.5 | 0.025 | 17.11 | 0.040 | Bal. |
3 | 45.1 | 0.024 | 17.14 | 0.044 | Bal. |
4 | 60.7 | 0.026 | 17.17 | 0.041 | Bal. |
Alloy no. | Region | Ni | Fe | Cr | P |
---|---|---|---|---|---|
1 | Dendrite core | 67.94 | 15.27 | 16.79 | - |
Interdendritic area | 66.46 | 15.10 | 18.36 | 0.079 | |
1.02 | 1.01 | 0.91 | |||
2 | Dendrite core | 51.51 | 31.82 | 16.67 | - |
Interdendritic area | 51.30 | 30.78 | 17.84 | 0.080 | |
1.00 | 1.03 | 0.93 | |||
3 | Dendrite core | 37.80 | 44.68 | 17.49 | 0.035 |
Interdendritic area | 36.71 | 46.43 | 16.86 | - | |
1.03 | 0.96 | 1.04 | |||
4 | Dendrite core | 21.67 | 60.27 | 18.02 | 0.044 |
Interdendritic area | 20.23 | 62.73 | 17.04 | - | |
1.07 | 0.96 | 1.06 |
Table 2 Distribution and partition coefficients of elements in different alloys by EPMA (wt%)
Alloy no. | Region | Ni | Fe | Cr | P |
---|---|---|---|---|---|
1 | Dendrite core | 67.94 | 15.27 | 16.79 | - |
Interdendritic area | 66.46 | 15.10 | 18.36 | 0.079 | |
1.02 | 1.01 | 0.91 | |||
2 | Dendrite core | 51.51 | 31.82 | 16.67 | - |
Interdendritic area | 51.30 | 30.78 | 17.84 | 0.080 | |
1.00 | 1.03 | 0.93 | |||
3 | Dendrite core | 37.80 | 44.68 | 17.49 | 0.035 |
Interdendritic area | 36.71 | 46.43 | 16.86 | - | |
1.03 | 0.96 | 1.04 | |||
4 | Dendrite core | 21.67 | 60.27 | 18.02 | 0.044 |
Interdendritic area | 20.23 | 62.73 | 17.04 | - | |
1.07 | 0.96 | 1.06 |
Fig. 5 Morphologies of fractures surfaces after tensile tests for alloy 1 a, e, alloy 2 b, f, alloy 3 c, g, alloy 4 d, h at low a-d, high e-h magnification
Fig. 7 Morphologies of fractures surfaces after stress test for alloy 1 a, e, alloy 2 b, f, alloy 3 c, g, alloy 4 d, h at low a-d, high e-h magnification
Fig. 9 Morphologies of grain boundaries in stress rupture of a, c alloy 1, b, d alloy 3 at a, b low, c, d high magnification, e TEM image, f EDS analysis of M23C6 in alloy 1
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