Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure?
Abstract
:1. Introduction
2. Materials and Methods
2.1. Sample and Welding
2.2. Microstructure
2.3. Finite Element Method Simulation
3. Results
3.1. Microstructural Analysis in the Melted Metal Zone
3.2. Microstructural Analysis in the Heat Affected Zone
3.3. Microstructural Analysis of the Fusion Line Interface
3.4. Hardness
4. Discussion
4.1. Weld Process Temperature Distribution
4.2. Temperature Evolution
4.3. Metallographic Study Correlation
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Physical Properties | Ta |
---|---|
Fusion temperature (K) | 3269 |
Vaporization temperature (K) | 5698 |
Density of solid metal (kg/m3) | 15,630 |
Thermal conductivity of solid (W/m · K) | 57.5 |
Thermal conductivity of liquid (W/m · K) | 66.5 |
Specific heat of solid (J/kg · K) | 140 |
Specific heat of liquid (J/kg · K) | 213 |
Latent heat of melting (kJ/kg) | 1.7 × 105 |
Grado | Fe | Si | Nb | W | Ti | O | Cr | H | N | TA |
---|---|---|---|---|---|---|---|---|---|---|
B-521 R05200 | 0.003 | 0.003 | 0.028 | 0.004 | 0.002 | 0.010 | 0.0005 | 0.001 | 0.002 | Balance |
Welding Characteristics and Parameters | - |
---|---|
Welding Process | GTAW |
Filler Material | No |
Weld layers | 1 |
Tungsten electrode diameter (mm) | 1 |
Length of the arc (mm) | 2 |
Voltage (V) | 11 |
Intensity (A) | 73 |
Welding speed (mm/min) | 56 |
Pre-heating | No |
Gas (ID-l/min) | Argon- |
Use of backup | No |
Welding Position | 1 G |
Polarity | DCEN |
Model of the w. machine | Lincoln Aspect 200 |
| |
---|---|
Zone | Hardness |
Base Metal (FL + 50 mm) | 120 (120–121) HV 0.05 |
Heat Affected Zone (FL + 2 mm) | 238 (237–238) HV 0.05 |
Welded Metal | 425 (425) HV 0.05 |
Zone (See Figure 8) | Max. T. (°C) | Time > 300 °C [s] | Location |
---|---|---|---|
(1) Melted metal | <4334.4 | 276 | Joint Point |
(2) Fusion Line | <3604.2 | 258 | Fusion Line |
(3) Recrystallization | <1450 | 221 | Fusion Line + 2 mm |
(4) Grain growth | <850 | 186 | Fusion Line + 5 mm |
(5) “Base” metal | <300 | 47 | Fusion Line + 50 mm |
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Bernardo Sánchez, A.; Presno Vélez, Á.; Fernández-Columbié, T.; Rodríguez-Gonzalez, I.; Suárez Torres, L.; Álvarez de Prado, L.; Menéndez Fernández, M. Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure? Appl. Sci. 2022, 12, 1440. https://doi.org/10.3390/app12031440
Bernardo Sánchez A, Presno Vélez Á, Fernández-Columbié T, Rodríguez-Gonzalez I, Suárez Torres L, Álvarez de Prado L, Menéndez Fernández M. Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure? Applied Sciences. 2022; 12(3):1440. https://doi.org/10.3390/app12031440
Chicago/Turabian StyleBernardo Sánchez, Antonio, Álvaro Presno Vélez, Tomás Fernández-Columbié, Isnel Rodríguez-Gonzalez, Ledennis Suárez Torres, Laura Álvarez de Prado, and Marta Menéndez Fernández. 2022. "Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure?" Applied Sciences 12, no. 3: 1440. https://doi.org/10.3390/app12031440
APA StyleBernardo Sánchez, A., Presno Vélez, Á., Fernández-Columbié, T., Rodríguez-Gonzalez, I., Suárez Torres, L., Álvarez de Prado, L., & Menéndez Fernández, M. (2022). Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure? Applied Sciences, 12(3), 1440. https://doi.org/10.3390/app12031440