1 Introduction
2 Alloy Design
2.1 Alloy 1
C | Mn | Al | Ni | Si | Co | Mo | |
---|---|---|---|---|---|---|---|
Alloy 1 | 0.7 | 0.02 | 1.4 | 3.3 | 4.0 | — | 0.25 |
Alloy 2 | 0.4 | 0.15 | 2.5 | 13.0 | — | 4.0 | 0.3 |
2.2 Alloy 2
3 Experimental Methods
3.1 As-transformed Microstructures
3.2 Thermal Stability
4 Results
4.1 Measured Composition
C | Mn | Al | Ni | Si | Co | Mo | |
---|---|---|---|---|---|---|---|
Alloy 1 | 0.72 | 0.02 | 1.38 | 3.40 | 3.88 | — | 0.20 |
Alloy 2 | 0.45 | 0.15 | 2.63 | 13.2 | 0.03 | 3.99 | 0.30 |
4.2 As-transformed Microstructures
Grain Size/nm | ||
---|---|---|
γ
r
|
α
b
| |
Alloy 1 | 70 ± 30 | 80 ± 50 |
Alloy 2 | 100 ± 30 | 140 ± 50 |
4.3 Thermal Stability
5 Discussion
\(a_{\upgamma _{\mathrm {r}}{}}\,\slash \,\mathrm {nm}\)
| |||
---|---|---|---|
As-transformed | Peak | Thermally Exposed | |
Alloy 1 |
\(3.6251\pm 0.0005\)
|
\(3.6546\pm 0.0006\)
|
\(3.6127\pm 0.0012\)
|
Alloy 2 |
\(3.5992\pm 0.0005\)
|
\(3.6463\pm 0.0007\)
|
\(3.5998\pm 0.0005\)
|
\(V_{\upgamma _{\mathrm {r}}{}}\) (Percent) | ||
---|---|---|
As-transformed | Thermally Exposed | |
Alloy 1 | 29 ± 3 | 3.0 ± 0.7 |
Alloy 2 | 28.8 ± 1.2 | 20.0 ± 1.0 |