The control method of porous structure for density gradient materials in direct metal laser sintering (DMLS)

Hyun Goo Kang, Toshiko Osada, Fujio Tsumori, Hideshi Miura

Research output: Contribution to journalArticle

Abstract

The effect of process parameters in direct metal laser sintering (DMLS) on the forming of density gradient porous structure was investigated. The melted and consolidated parts of metallic powders by laser irradiation (it is called as melted part in this paper) sparsely form along the laser scanning line. The size of melted part strongly depends on the laser input energy. During the direct metal laser sintering, the melted parts conglutinate with each other and made the larger melted part. It was connected to other melted parts in different way by strong laser power and high scan rate. Especially, in the case of same laser energy density, if the scan rate become faster, the connection between melted parts gets stronger and the high density is obtained. With laser sintering condition for similar relative density, the microstructure of material formed by higher scan rate shows more homogeneous microstructure than that of the others formed by slow scan rate.

Original languageEnglish
Pages (from-to)147-151
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume57
Issue number3
DOIs
Publication statusPublished - Mar 1 2010

Fingerprint

Sintering
Metals
Lasers
Microstructure
Laser beam effects
Powders
Scanning

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Metals and Alloys
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

Cite this

The control method of porous structure for density gradient materials in direct metal laser sintering (DMLS). / Kang, Hyun Goo; Osada, Toshiko; Tsumori, Fujio; Miura, Hideshi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 57, No. 3, 01.03.2010, p. 147-151.

Research output: Contribution to journalArticle

@article{b244f697d08741d1977e2ec1daab0d49,
title = "The control method of porous structure for density gradient materials in direct metal laser sintering (DMLS)",
abstract = "The effect of process parameters in direct metal laser sintering (DMLS) on the forming of density gradient porous structure was investigated. The melted and consolidated parts of metallic powders by laser irradiation (it is called as melted part in this paper) sparsely form along the laser scanning line. The size of melted part strongly depends on the laser input energy. During the direct metal laser sintering, the melted parts conglutinate with each other and made the larger melted part. It was connected to other melted parts in different way by strong laser power and high scan rate. Especially, in the case of same laser energy density, if the scan rate become faster, the connection between melted parts gets stronger and the high density is obtained. With laser sintering condition for similar relative density, the microstructure of material formed by higher scan rate shows more homogeneous microstructure than that of the others formed by slow scan rate.",
author = "Kang, {Hyun Goo} and Toshiko Osada and Fujio Tsumori and Hideshi Miura",
year = "2010",
month = "3",
day = "1",
doi = "10.2497/jjspm.57.147",
language = "English",
volume = "57",
pages = "147--151",
journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",
issn = "0532-8799",
publisher = "Japan Society of Powder and Powder Metallurgy",
number = "3",

}

TY - JOUR

T1 - The control method of porous structure for density gradient materials in direct metal laser sintering (DMLS)

AU - Kang, Hyun Goo

AU - Osada, Toshiko

AU - Tsumori, Fujio

AU - Miura, Hideshi

PY - 2010/3/1

Y1 - 2010/3/1

N2 - The effect of process parameters in direct metal laser sintering (DMLS) on the forming of density gradient porous structure was investigated. The melted and consolidated parts of metallic powders by laser irradiation (it is called as melted part in this paper) sparsely form along the laser scanning line. The size of melted part strongly depends on the laser input energy. During the direct metal laser sintering, the melted parts conglutinate with each other and made the larger melted part. It was connected to other melted parts in different way by strong laser power and high scan rate. Especially, in the case of same laser energy density, if the scan rate become faster, the connection between melted parts gets stronger and the high density is obtained. With laser sintering condition for similar relative density, the microstructure of material formed by higher scan rate shows more homogeneous microstructure than that of the others formed by slow scan rate.

AB - The effect of process parameters in direct metal laser sintering (DMLS) on the forming of density gradient porous structure was investigated. The melted and consolidated parts of metallic powders by laser irradiation (it is called as melted part in this paper) sparsely form along the laser scanning line. The size of melted part strongly depends on the laser input energy. During the direct metal laser sintering, the melted parts conglutinate with each other and made the larger melted part. It was connected to other melted parts in different way by strong laser power and high scan rate. Especially, in the case of same laser energy density, if the scan rate become faster, the connection between melted parts gets stronger and the high density is obtained. With laser sintering condition for similar relative density, the microstructure of material formed by higher scan rate shows more homogeneous microstructure than that of the others formed by slow scan rate.

UR - http://www.scopus.com/inward/record.url?scp=77953262977&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953262977&partnerID=8YFLogxK

U2 - 10.2497/jjspm.57.147

DO - 10.2497/jjspm.57.147

M3 - Article

AN - SCOPUS:77953262977

VL - 57

SP - 147

EP - 151

JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

SN - 0532-8799

IS - 3

ER -