Table 1 The alloys predicted from iterative workflow by machine learning and their experimental properties.

From: Machine learning assisted design of γ′-strengthened Co-base superalloys with multi-performance optimization

Alloy no.

Composition

Detrimental phase

Vγ′ (%)

Tγ′-solvus (°C)

Tsolidus (°C)

Tliquidus (°C)

Processing window (°C)

Freezing range (°C)

ρ

(g cm−3)

Mass gain

(mg cm−2)

1–1

Co-20Ni-10Al-5Ti-4Ta-1W-7Cr

1

–

1193.0

1242.1

1273.4

49.1

31.3

8.61

0.29

1–2

Co-36Ni-12Al-2Ti-4Ta-1W-2Cr

0

74.5

1266.5

1315.6

1362.4

49.1

46.8

8.68

1.99

1–3

Co-21Ni-10Al-5Ti-4Ta-1W-7Cr

1

–

1198.2

1242.2

1276.4

44.0

34.2

8.61

0.31

1–4

Co-25Ni-12Al-2Ti-4Ta-1W-10Cr

1

–

1146.3

1274.0

1311.4

127.7

37.4

8.55

0.36

2–1

Co-38Ni-12Al-3Ti-4Ta-2W-2Cr

Failed to process

2–2

Co-36Ni-12Al-3Ti-4Ta-1W-2Cr

1

–

1259.1

1295.2

1344.2

36.1

49.0

8.61

2.51

2–3

Co-36Ni-11Al-3Ti-4Ta-1W-2Cr

1

–

1270.2

1300.7

1352.0

30.5

51.3

8.68

3.38

2–4

Co-36Ni-13Al-2Ti-4Ta-1W-2Cr

1

–

1271.3

1305.8

1355.1

34.5

49.3

8.59

2.26

3–1

Co-38Ni-13Al-2Ti-4Ta-1W-2Cr

1

–

1274.4

1305.6

1352.5

31.2

46.9

8.61

1.61

3–2

Co-38Ni-10Al-4Ti-4Ta-3W-2Cr

Failed to process

3–3

Co-36Ni-11Al-2Ti-4Ta-2W-2Cr

0

76.8

1247.6

1319.6

1364.7

72.0

45.1

8.87

4.32

3–4

Co-36Ni-13Al-1Ti-4Ta-1W-2Cr

0

79.9

1252.8

1323.0

1365.3

70.2

42.3

8.63

3.39

  1. Apart from the two alloys that could not be processed (homogenized), the experiment and characterization results of the other ten alloys are provided. The nominal composition (at.%) is used to represent these alloys, which is nearly consistent with the measured composition detected by EDS in FE-SEM (measured compositions are shown in Supplementary Table 3). The criterion for judging the existence of detrimental phase is based on the microstructure of the alloy aged at 1000 °C for 1000 h, and a label of “1” represents the appearance of detrimental phases and a label of “0” means an absence. The γ′ volume fraction is obtained from the mean value of five different microstructure images. The Tγ′-solvus, Tsolidus, Tliquidus are obtained by DSC heating curves. The density is measured based on Archimedes displacement principle. The mass gain of each alloy is acquired after isothermal oxidation at 1000 °C for 100 h.
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