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.
|ジャーナル||Proceedings of the International Astronautical Congress, IAC|
|出版ステータス||Published - 2019|
|イベント||70th International Astronautical Congress, IAC 2019 - Washington, United States|
継続期間: 2019 10月 21 → 2019 10月 25
ASJC Scopus subject areas