Evaluation and analysis of generated void in directed energy deposition of inconel 718

Tatsuhiko Kuriya, Ryo Koike, Yohei Oda, Yasuhiro Kakinuma

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)371-377
Number of pages7
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Volume84
Issue number4
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Porosity
Gases
High energy lasers
Lasers
Powder metals
Aerospace industry
Density (specific gravity)
Strength of materials
Deterioration
Argon
Metals
Hot Temperature

Keywords

  • 3D printing
  • Additive manufacturing
  • Directed Energy Deposition
  • Inconel 718
  • Laser
  • Porosity

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Evaluation and analysis of generated void in directed energy deposition of inconel 718. / Kuriya, Tatsuhiko; Koike, Ryo; Oda, Yohei; Kakinuma, Yasuhiro.

In: Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering, Vol. 84, No. 4, 01.01.2018, p. 371-377.

Research output: Contribution to journalArticle

@article{a9f758c6dc9d427d84f586814710275c,
title = "Evaluation and analysis of generated void in directed energy deposition of inconel 718",
abstract = "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.",
keywords = "3D printing, Additive manufacturing, Directed Energy Deposition, Inconel 718, Laser, Porosity",
author = "Tatsuhiko Kuriya and Ryo Koike and Yohei Oda and Yasuhiro Kakinuma",
year = "2018",
month = "1",
day = "1",
doi = "10.2493/jjspe.84.371",
language = "English",
volume = "84",
pages = "371--377",
journal = "Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering",
issn = "0912-0289",
publisher = "Japan Society for Precision Engineering",
number = "4",

}

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

PY - 2018/1/1

Y1 - 2018/1/1

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

UR - http://www.scopus.com/inward/record.url?scp=85045005089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85045005089&partnerID=8YFLogxK

U2 - 10.2493/jjspe.84.371

DO - 10.2493/jjspe.84.371

M3 - Article

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

SN - 0912-0289

IS - 4

ER -