TY - JOUR
T1 - In-situ observation of metal powder melting behavior using X-ray and thermal imaging
AU - Wakai, Yuki
AU - Ogura, Tomoya
AU - Suzuki, Shinsuke
AU - Nakano, Shizuka
AU - Kajino, Satoshi
N1 - Funding Information:
This research was supported by Japan Science and Technology (JST) under the Industrial-Academia Collaborative R&D Program “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials.”
Funding Information:
This research was supported by Japan Science and Technology (JST) under the Industrial-Academia Collaborative R&D Program ?Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials.?
PY - 2019
Y1 - 2019
N2 - This study investigates the melting behavior of metal powder during the Laser Powder Bed Fusion (LPBF) process using in-situ X-ray and thermal imaging. The metal powder was irradiated by a 150 W-fiber laser for 1-s. As a result, a low brightness area and a light brightness hollow were generated in the X-ray image. We propose two analytical methods that use the Lambert-Beer law to investigate these parts in detail. The first analytical method differentiates a phase of the powder bed in the X-ray image. The result of the differentiation was consistent with the thermal imaging which shows that the low brightness area was a melt pool. The second analytical method calculates the width of the hollow using the brightness obtained from the X-ray image. The theoretical results for the width of the hollow were compared with the experimental data. The theoretical results were found to be 6% higher than experimental value.
AB - This study investigates the melting behavior of metal powder during the Laser Powder Bed Fusion (LPBF) process using in-situ X-ray and thermal imaging. The metal powder was irradiated by a 150 W-fiber laser for 1-s. As a result, a low brightness area and a light brightness hollow were generated in the X-ray image. We propose two analytical methods that use the Lambert-Beer law to investigate these parts in detail. The first analytical method differentiates a phase of the powder bed in the X-ray image. The result of the differentiation was consistent with the thermal imaging which shows that the low brightness area was a melt pool. The second analytical method calculates the width of the hollow using the brightness obtained from the X-ray image. The theoretical results for the width of the hollow were compared with the experimental data. The theoretical results were found to be 6% higher than experimental value.
KW - Additive Manufacturing
KW - In-situ observation
KW - Laser Powder Bed Fusion
KW - Thermal imaging
KW - X-ray imaging
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M3 - Conference article
AN - SCOPUS:85079123391
SN - 0074-1795
VL - 2019-October
JO - Proceedings of the International Astronautical Congress, IAC
JF - Proceedings of the International Astronautical Congress, IAC
M1 - IAC-19_C2_5_5_x53925
T2 - 70th International Astronautical Congress, IAC 2019
Y2 - 21 October 2019 through 25 October 2019
ER -