TY - JOUR
T1 - Evaluation and analysis of generated void in directed energy deposition of inconel 718
AU - Kuriya, Tatsuhiko
AU - Koike, Ryo
AU - Oda, Yohei
AU - Kakinuma, Yasuhiro
N1 - Publisher Copyright:
© 2018 Japan Society for Precision Engineering. All rights reserved.
PY - 2018
Y1 - 2018
N2 - In recent years, the Directed Energy Deposition (DED) method using Inconel 718, in which supplied metal powder is melted by high energy laser and metal layers are deposited layer by layer, has been actively studied and attracted in the aerospace industry. Voids generated in the deposited part cause deterioration of the mechanical strength. Hence, avoiding voids is one of the most important issues in the DED process. In this study, the mechanism in which voids are generated was investigated by observing the porosity rate, analyzing gas included in voids and observing thermal distribution during the deposition process. The result indicated that the deposition with a laser power of 2000 W and a feed rate of 1000 mm/min has the lowest porosity, and constant laser energy density is effective to keep the constant porosity. Furthermore, Argon gas for shield and most atmospheric components were detected in the voids of the deposited part by analyzing gas in the voids.
AB - In recent years, the Directed Energy Deposition (DED) method using Inconel 718, in which supplied metal powder is melted by high energy laser and metal layers are deposited layer by layer, has been actively studied and attracted in the aerospace industry. Voids generated in the deposited part cause deterioration of the mechanical strength. Hence, avoiding voids is one of the most important issues in the DED process. In this study, the mechanism in which voids are generated was investigated by observing the porosity rate, analyzing gas included in voids and observing thermal distribution during the deposition process. The result indicated that the deposition with a laser power of 2000 W and a feed rate of 1000 mm/min has the lowest porosity, and constant laser energy density is effective to keep the constant porosity. Furthermore, Argon gas for shield and most atmospheric components were detected in the voids of the deposited part by analyzing gas in the voids.
KW - 3D printing
KW - Additive manufacturing
KW - Directed Energy Deposition
KW - Inconel 718
KW - Laser
KW - Porosity
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U2 - 10.2493/jjspe.84.371
DO - 10.2493/jjspe.84.371
M3 - Article
AN - SCOPUS:85045005089
SN - 0912-0289
VL - 84
SP - 371
EP - 377
JO - Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
JF - Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
IS - 4
ER -