Optimization of Step Times for ASTM F1624 Methodology Applied to Small Punch Tests in Aggressive Environments
Abstract
:1. Introduction
2. Materials and Methods
2.1. ASTM F1624 Method
2.2. Application of Step Loading Technique from ASTM F1624 [18] to Small Punch Test
2.3. Materials and Environment Employed
3. Results
4. Conclusions and Future Work
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Hardness | Step | Step Load | Step Time (h) | Profile Code [18] |
---|---|---|---|---|
33 ≤ HRC < 45 | 1–10 | 5% of PFFS | 2 | (10/5/2.4) |
11–20 | 4 | |||
45 ≤ HRC < 55 | 1–10 | 5% of PFFS | 1 | (10/5/1.2) |
11–20 | 2 | |||
HRC ≥ 55 | 1–20 | 5% of PFFS | 1 | (10/5/1) |
Hardness | Step | Proposal #1 (min) | Proposal #2 (min) | Proposal #3 (min) |
---|---|---|---|---|
33 ≤ HRC < 45 | 1–10 | 30′ | 20′ | 15′ |
11–20 | 60′ | 40′ | 30′ | |
45 ≤ HRC < 55 | 1–10 | 15′ | 10′ | 7′ |
11–20 | 30′ | 20′ | 15′ | |
HRC ≥ 55 | 1–20 | 15′ | 10′ | 7′ |
Material and Environment | Steps Duration | PFFL-SPT (N) | Pth-1 (N) | Pth-2 (N) | Pth-3 (N) | Difference |
---|---|---|---|---|---|---|
35 HRC 1 mA/cm2 | 15′–30′ | 1466 | 1246 | 1028 | 1018 | +6% |
20′–40’ | 1466 | 1099 | 968 | 958 | - | |
30′–60′ | 1466 | 1026 | 959 | 950 | −1% | |
35 HRC 5 mA/cm2 | 15′–30′ | 1466 | 953 | 786 | 778 | +16% |
20′–40′ | 1466 | 880 | 677 | 671 | - | |
30′–60′ | 1466 | 880 | 677 | 671 | 0% | |
35 HRC 10 mA/cm2 | 15′–30′ | 1466 | 880 | 774 | 766 | +25% |
20′–40′ | 1466 | 806 | 621 | 615 | - | |
30′–60′ | 1466 | 806 | 621 | 615 | 0% |
Material and Environment | Steps Duration | PFFL-SPT (N) | Pth-1 (N) | Pth-2 (N) | Pth-3 (N) | Difference |
---|---|---|---|---|---|---|
50 HRC 1 mA/cm2 | 7′–15′ | 1428 | 471 | 389 | 385 | +22% |
10′–20′ | 1428 | 471 | 324 | 321 | - | |
15′–30′ | 1428 | 471 | 324 | 321 | 0% | |
50 HRC 5 mA/cm2 | 7′–15′ | 1428 | 393 | 346 | 342 | +18% |
10′–20′ | 1428 | 314 | 294 | 291 | - | |
15′–30′ | 1428 | 314 | 294 | 291 | 0% | |
50 HRC 10 mA/cm2 | 7′–15′ | 1428 | 393 | 302 | 299 | +18% |
10′–20′ | 1428 | 314 | 259 | 257 | - | |
15′–30′ | 1428 | 314 | 259 | 257 | 0% |
Material and Environment | Steps Duration | PFFL-SPT (N) | Pth-1 (N) | Pth-2 (N) | Pth-3 (N) | Difference |
---|---|---|---|---|---|---|
60 HRC 1 mA/cm2 | 7′ | 677 | 223 | 197 | 195 | +7% |
10′ | 677 | 223 | 184 | 182 | - | |
15′ | 677 | 223 | 184 | 182 | 0% | |
60 HRC 5 mA/cm2 | 7′ | 677 | 223 | 160 | 158 | +8% |
10′ | 677 | 186 | 143 | 142 | - | |
15′ | 677 | 149 | 147 | 146 | +3% | |
60 HRC 10 mA/cm2 | 7′ | 677 | 186 | 133 | 132 | +16% |
10′ | 677 | 149 | 115 | 114 | - | |
15′ | 677 | 149 | 115 | 114 | 0% |
Hardness | Step | Step Load | Step Time (min) |
---|---|---|---|
33 ≤ HRC < 45 | 1–10 | 5% of PFFS-SPT | 20 |
11–20 | 40 | ||
45 ≤ HRC < 55 | 1–10 | 5% of PFFS-SPT | 10 |
11–20 | 20 | ||
HRC ≥ 55 | 1–20 | 5% of PFFS-SPT | 10 |
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Andrea, L.; Arroyo, B.; Álvarez, J.A.; Gutiérrez-Solana, F.; Cicero, S.; Guilbert, E. Optimization of Step Times for ASTM F1624 Methodology Applied to Small Punch Tests in Aggressive Environments. Metals 2024, 14, 863. https://doi.org/10.3390/met14080863
Andrea L, Arroyo B, Álvarez JA, Gutiérrez-Solana F, Cicero S, Guilbert E. Optimization of Step Times for ASTM F1624 Methodology Applied to Small Punch Tests in Aggressive Environments. Metals. 2024; 14(8):863. https://doi.org/10.3390/met14080863
Chicago/Turabian StyleAndrea, Laura, Borja Arroyo, Jose Alberto Álvarez, Federico Gutiérrez-Solana, Sergio Cicero, and Elise Guilbert. 2024. "Optimization of Step Times for ASTM F1624 Methodology Applied to Small Punch Tests in Aggressive Environments" Metals 14, no. 8: 863. https://doi.org/10.3390/met14080863