Improvement of mechanical properties of injection molded ni-base superalloy compacts

Kentaro Kudo, Sek Kin Wai, Toshiko Osada, Fujio Tsumori, Hideshi Miura

研究成果: ジャーナルへの寄稿記事

抄録

Superalloy has been used for aerospace application because of their excellent attributes of high strength and corrosion resistance at high temperature. Inconel 718 is one of the representative Ni-based superalloy. Generally, superalloy has poor workability, especially high tool wear by machining, so that it is not easy to produce the components of complex shaped parts at low cost. To overcome such as the problem, metal injection molding (MIM) process would be a useful technique which offers net shape production, high design flexibility, and high cost efficiency for mass production. In this study, gas-atomized fine alloy powder of Inconel 718 was prepared for MIM process, and the mechanical properties of injection molded compacts were investigated. The relative density over 99.7 %, which is much higher than density of usual MIM compacts, was obtained by supersolidious liquid-phase sintering. Furthermore, injection molded Inconel 718 showed high fatigue strength comparable to the wrought materials, because the pore size of the MIM compacts was smaller than the inclusion size of wrought materials. And it was found that the grain size was more dominant than pore size against the fatigue failure of MIM Inconel 718 with near full density.

元の言語英語
ページ(範囲)462-467
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
63
発行部数7
DOI
出版物ステータス出版済み - 1 1 2016

Fingerprint

Metal molding
Superalloys
Injection molding
Mechanical properties
Pore size
Liquid phase sintering
Aerospace applications
Powders
Corrosion resistance
Costs
Machining
Gases
Wear of materials
Fatigue of materials

All Science Journal Classification (ASJC) codes

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

これを引用

Improvement of mechanical properties of injection molded ni-base superalloy compacts. / Kudo, Kentaro; Wai, Sek Kin; Osada, Toshiko; Tsumori, Fujio; Miura, Hideshi.

:: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 巻 63, 番号 7, 01.01.2016, p. 462-467.

研究成果: ジャーナルへの寄稿記事

@article{c373fcd589b24a3ab8b914378f7e23a2,
title = "Improvement of mechanical properties of injection molded ni-base superalloy compacts",
abstract = "Superalloy has been used for aerospace application because of their excellent attributes of high strength and corrosion resistance at high temperature. Inconel 718 is one of the representative Ni-based superalloy. Generally, superalloy has poor workability, especially high tool wear by machining, so that it is not easy to produce the components of complex shaped parts at low cost. To overcome such as the problem, metal injection molding (MIM) process would be a useful technique which offers net shape production, high design flexibility, and high cost efficiency for mass production. In this study, gas-atomized fine alloy powder of Inconel 718 was prepared for MIM process, and the mechanical properties of injection molded compacts were investigated. The relative density over 99.7 {\%}, which is much higher than density of usual MIM compacts, was obtained by supersolidious liquid-phase sintering. Furthermore, injection molded Inconel 718 showed high fatigue strength comparable to the wrought materials, because the pore size of the MIM compacts was smaller than the inclusion size of wrought materials. And it was found that the grain size was more dominant than pore size against the fatigue failure of MIM Inconel 718 with near full density.",
author = "Kentaro Kudo and Wai, {Sek Kin} and Toshiko Osada and Fujio Tsumori and Hideshi Miura",
year = "2016",
month = "1",
day = "1",
doi = "10.2497/jjspm.63.462",
language = "English",
volume = "63",
pages = "462--467",
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 = "7",

}

TY - JOUR

T1 - Improvement of mechanical properties of injection molded ni-base superalloy compacts

AU - Kudo, Kentaro

AU - Wai, Sek Kin

AU - Osada, Toshiko

AU - Tsumori, Fujio

AU - Miura, Hideshi

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Superalloy has been used for aerospace application because of their excellent attributes of high strength and corrosion resistance at high temperature. Inconel 718 is one of the representative Ni-based superalloy. Generally, superalloy has poor workability, especially high tool wear by machining, so that it is not easy to produce the components of complex shaped parts at low cost. To overcome such as the problem, metal injection molding (MIM) process would be a useful technique which offers net shape production, high design flexibility, and high cost efficiency for mass production. In this study, gas-atomized fine alloy powder of Inconel 718 was prepared for MIM process, and the mechanical properties of injection molded compacts were investigated. The relative density over 99.7 %, which is much higher than density of usual MIM compacts, was obtained by supersolidious liquid-phase sintering. Furthermore, injection molded Inconel 718 showed high fatigue strength comparable to the wrought materials, because the pore size of the MIM compacts was smaller than the inclusion size of wrought materials. And it was found that the grain size was more dominant than pore size against the fatigue failure of MIM Inconel 718 with near full density.

AB - Superalloy has been used for aerospace application because of their excellent attributes of high strength and corrosion resistance at high temperature. Inconel 718 is one of the representative Ni-based superalloy. Generally, superalloy has poor workability, especially high tool wear by machining, so that it is not easy to produce the components of complex shaped parts at low cost. To overcome such as the problem, metal injection molding (MIM) process would be a useful technique which offers net shape production, high design flexibility, and high cost efficiency for mass production. In this study, gas-atomized fine alloy powder of Inconel 718 was prepared for MIM process, and the mechanical properties of injection molded compacts were investigated. The relative density over 99.7 %, which is much higher than density of usual MIM compacts, was obtained by supersolidious liquid-phase sintering. Furthermore, injection molded Inconel 718 showed high fatigue strength comparable to the wrought materials, because the pore size of the MIM compacts was smaller than the inclusion size of wrought materials. And it was found that the grain size was more dominant than pore size against the fatigue failure of MIM Inconel 718 with near full density.

UR - http://www.scopus.com/inward/record.url?scp=84982824831&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84982824831&partnerID=8YFLogxK

U2 - 10.2497/jjspm.63.462

DO - 10.2497/jjspm.63.462

M3 - Article

VL - 63

SP - 462

EP - 467

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 - 7

ER -