Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis
Abstract
:1. Introduction
2. Theory
2.1. Homogeneous Sample—The Parker Model
2.2. Homogeneous Sample with Heat Loss Correction
2.3. Heterogeneous Samples-Three-Layered Analysis
3. Experimental Apparatus and Specimen
4. Results and Discussion
4.1. Solid Reference Samples, Standard Solid Sample Holder
4.2. Powder Sample, Special Sample Holder
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Samples | Mean Thermal Diffusivity (cm^{2}/s) | Deviation | |
---|---|---|---|
In718 solid | Experiment (Temp. range: 100 °C–600 °C) | 0.0434 | 4.8% |
Agazhanov [36] (Temp. range: 126.85 °C–626.85 °C) | 0.0414 | ||
Ti64 solid | Experiment (Temp. range: 100 °C–600 °C) | 0.0362 | 4.0% |
Milosevic [37] (Temp. range: 48.85 °C–584.85 °C) | 0.0377 | ||
Stainless steel solid | Experiment (Temp. range: 50 °C–400 °C) | 0.0461 | 6.5% |
Sweet [24] (Temp. range: 50 °C–400 °C) | 0.0433 |
Temperature (°C) | Max. Temp. Signal (V) | t_{0.75} (s) | t_{0.25} (s) | t_{0.5} (s) | $\mathit{\alpha}$ (cm^{2}/s) |
---|---|---|---|---|---|
200 | 1.02 | 2.36 | 1.1 | 3.2 | 0.00040 |
400 | 0.91 | 2.97 | 1.4 | 3.09 | 0.00041 |
600 | 1.92 | 2.4 | 1.1 | 2.1 | 0.00062 |
Temperatures (°C) | α Measured (cm^{2}/s) | α from Literature (cm^{2}/s) [26,39] | Deviation |
---|---|---|---|
200 | 0.0015 | 0.00159 | 5.7% |
400 | 0.0013 | 0.0014 | 7.1% |
600 | 0.0016 | 0.00164 | 2.4% |
Temperatures (°C) | α (cm^{2}/s) | α from Literature (cm^{2}/s) [25] |
---|---|---|
100 | 0.0012 | 0.00143 |
200 | 0.0013 | 0.00168 |
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Habiba, U.; Hebert, R.J. Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis. Materials 2023, 16, 6494. https://doi.org/10.3390/ma16196494
Habiba U, Hebert RJ. Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis. Materials. 2023; 16(19):6494. https://doi.org/10.3390/ma16196494
Chicago/Turabian StyleHabiba, Ummay, and Rainer J. Hebert. 2023. "Powder Bed Thermal Diffusivity Using Laser Flash Three Layer Analysis" Materials 16, no. 19: 6494. https://doi.org/10.3390/ma16196494