Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy
Abstract
:1. Introduction
2. Materials and Methods
3. Experimental
3.1. Research Plan
- Nondestructive testing (NDT):
- Visual testing–VT,
- Penetrant testing–PT,
- Radiographic testing–RT.
- Destructive testing (DT):
- Static tensile tests,
- Bending tests,
- Macro- and microscopic examinations,
- EDS analysis,
- Confocal microscopy,
- Microhardness measurements.
3.2. Welding Technology
4. Results and Discussion
4.1. Nondestructive Testing
4.2. Destructive Testing
4.2.1. Static Tensile Test
4.2.2. Bending Test
4.2.3. Macro- and Microscopic Examinations
4.2.4. Confocal Microscopy
4.2.5. Microhardness Measurements
5. Summary
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Chemical Composition [wt. %] | |||||||
C | Si | Mn | P | S | Cr | Ni | N |
0.014 | 0.41 | 1.56 | 0.021 | 0.008 | 18.18 | 10.24 | 0.070 |
Mechanical Properties | |||||||
Rp0.2 [MPa] | Rp1.0 [MPa] | Rm [MPa] | A50 [%] | ||||
312 | 362 | 599 | 64 |
Chemical Composition [wt. %] | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Ti | Al | Fe |
0.072 | 0.48 | 0.79 | 0.018 | 0.001 | 19.25 | 30.20 | 0.18 | 0.54 | 0.43 | 47.6 |
Mechanical Properties | ||||||||||
Rp0.2 [MPa] | Rm [MPa] | A50 [%] | Grain Size ASTM E112 | |||||||
202 | 582 | 57 | Nr. 6 |
Chemical Composition [wt. %] | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Ti | Nb | Fe |
<0.01 | <0.1 | 3.1 | 0.001 | 0.001 | 20.5 | 73.0 | <0.1 | 0.4 | 2.5 | 0.2 |
Mechanical Properties | ||||||||||
Rp0.2 [MPa] | Rm [MPa] | A (L0 = 5d) [%] | KV [J] | |||||||
≥400 | ≥620 | ≥35 | ≥150 |
Run * | Welding Process | Size of Filler Metal [mm] | Welding Current [A] | Arc Voltage [V] | Type of Current/ Polarity | Travel Speed [mm/s] | Heat ** Input [kJ/mm] |
---|---|---|---|---|---|---|---|
1 | 141 (TIG) | 2.0 | 60–110 | 10.5–11.0 | DC- | 1.2–2.5 | 0.2–0.6 |
2-n | 141 (TIG) | 2.0 | 80–110 | 9.0–10.0 | DC- | 1.2–2.5 | 0.2–0.6 |
No Specimens | Calculation Cross-Section, So [mm2] | Total Loading Force, Ib [kN] | Tensile Strength, Rm [MPa] | Place of Fracture |
---|---|---|---|---|
1 | 321.5 | 188 | 584 | Base material Incoloy 800HT |
2 | 312.5 | 184 | 589 | Base material Incoloy 800HT |
Zone | Sa [µm] | Sq [µm] | Sp [µm] | Sv [µm] | Sz [µm] | Sku [µm] | Ssk [µm] |
---|---|---|---|---|---|---|---|
Weld–HAZ–800HT nickel alloy | 0.04 | 0.06 | 0.17 | 0.28 | 0.46 | 4.19 | −0.36 |
Weld–HAZ–304L stainless steel | 0.16 | 0.20 | 0.65 | 0.66 | 1.32 | 2.83 | −0.18 |
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Rogalski, G.; Świerczyńska, A.; Landowski, M.; Fydrych, D. Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy. Metals 2020, 10, 559. https://doi.org/10.3390/met10050559
Rogalski G, Świerczyńska A, Landowski M, Fydrych D. Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy. Metals. 2020; 10(5):559. https://doi.org/10.3390/met10050559
Chicago/Turabian StyleRogalski, Grzegorz, Aleksandra Świerczyńska, Michał Landowski, and Dariusz Fydrych. 2020. "Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy" Metals 10, no. 5: 559. https://doi.org/10.3390/met10050559