Table 2 Part I and Part II alloys: comparison of top Part II ternaries with top Part I ternaries and quarternaries, as well as experimental reference alloys CrMoNbV16 (metastable) and MoNbTaVW8 (equilibrium), all at 1300 K.

From: Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part II: comprehensive ternary design and validation

Optimization—metastable

Yield strength

Alloy

Part I, 4

2.06

Al20Fe25W50Zr5

Part I, 3

1.87

Cr44Nb20W36

Part II, 3 (1300)

1.86

Cr44Nb18W38

Part II, 3 (1200–1500)

1.85

Cr44Nb16W40

Experiment

1.06

CrMoNbV

Optimization—equilibrium

Yield strength

Alloy

Part I, 4

1.53

Hf25Mo40Ta30Zr5

Part I, 3

1.53

Hf32Mo40Ta28

Part II, 3 (1300)

1.46

Hf32Mo38Ta30

Part II, 3 (1200–1500)

1.31

Hf22Mo38Ta40

Experiment

0.83

MoNbTaVW

Optimization—metastable

Specific yield strength

Alloy

Part I, 4

0.22

Al5V50W15Zr30

Part I, 3

0.19

Cr54Mo26Nb20

Part II, 3 (1300)

0.185

Cr54Mo28Nb18

Part II, 3 (1200–1500)

0.178

Cr42Mo36Nb22

Experiment

0.133

CrMoNbV

Optimization—equilibrium

Specific yield strength

Alloy

Part I, 4

0.17

Fe30Mo10Ti45Zr15

Part I, 3

0.19

Al32Fe58Zr10

Part II, 3 (1300)

0.158

Cr52Mo34Ti14

Part II, 3 (1200–1500)

0.143

Cr40Mo48Ti12

Experiment

0.069

MoNbTaVW

  1. Optimizations are labeled by phase stability constraint (metastable with respect to BCC phase separation or equilibrium), Part I or II, and alloy complexity (3 or 4 elements). Part II optimizations are also labeled by temperature or temperature range considered (units are K). Yield strength and specific yield strength units are GPa and GPa cm3 g−1. CrMoNbV values are extrapolated from 1273 K, and MoNbTaVW values are interpolated between 1273 and 1473 K data.
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