Fatigue failure properties of injection molded superalloy compacts

Hikaru Ikeda, Toshiko Osada, Hyung Goo Kang, Fujio Tsumori, Hideshi Miura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape powder forming, has been applied to fabricate the Inconel 718 alloy compacts using two type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99%). However, the fatigue strength of heat treated sintered Inconel 718 compacts showed 65% of heat treated wrought materials due to the remained pores. The effect of remained pores on fatigue strength was discussed by the prediction equation of endurance limit considering the inclusion.

Original languageEnglish
Pages (from-to)679-685
Number of pages7
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume58
Issue number11
DOIs
Publication statusPublished - Nov 1 2011

Fingerprint

Superalloys
Powders
Metal molding
Fatigue of materials
Injection molding
Oxidation resistance
Nuclear energy
Corrosion resistance
Durability
Gases
Water
Costs
Temperature
Hot Temperature
Fatigue strength

All Science Journal Classification (ASJC) codes

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

Cite this

Fatigue failure properties of injection molded superalloy compacts. / Ikeda, Hikaru; Osada, Toshiko; Kang, Hyung Goo; Tsumori, Fujio; Miura, Hideshi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 58, No. 11, 01.11.2011, p. 679-685.

Research output: Contribution to journalArticle

@article{ea48e7b082d84e5ab12e2ec5517e94eb,
title = "Fatigue failure properties of injection molded superalloy compacts",
abstract = "Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape powder forming, has been applied to fabricate the Inconel 718 alloy compacts using two type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99{\%}). However, the fatigue strength of heat treated sintered Inconel 718 compacts showed 65{\%} of heat treated wrought materials due to the remained pores. The effect of remained pores on fatigue strength was discussed by the prediction equation of endurance limit considering the inclusion.",
author = "Hikaru Ikeda and Toshiko Osada and Kang, {Hyung Goo} and Fujio Tsumori and Hideshi Miura",
year = "2011",
month = "11",
day = "1",
doi = "10.2497/jjspm.58.679",
language = "English",
volume = "58",
pages = "679--685",
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 = "11",

}

TY - JOUR

T1 - Fatigue failure properties of injection molded superalloy compacts

AU - Ikeda, Hikaru

AU - Osada, Toshiko

AU - Kang, Hyung Goo

AU - Tsumori, Fujio

AU - Miura, Hideshi

PY - 2011/11/1

Y1 - 2011/11/1

N2 - Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape powder forming, has been applied to fabricate the Inconel 718 alloy compacts using two type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99%). However, the fatigue strength of heat treated sintered Inconel 718 compacts showed 65% of heat treated wrought materials due to the remained pores. The effect of remained pores on fatigue strength was discussed by the prediction equation of endurance limit considering the inclusion.

AB - Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape powder forming, has been applied to fabricate the Inconel 718 alloy compacts using two type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99%). However, the fatigue strength of heat treated sintered Inconel 718 compacts showed 65% of heat treated wrought materials due to the remained pores. The effect of remained pores on fatigue strength was discussed by the prediction equation of endurance limit considering the inclusion.

UR - http://www.scopus.com/inward/record.url?scp=84856076877&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856076877&partnerID=8YFLogxK

U2 - 10.2497/jjspm.58.679

DO - 10.2497/jjspm.58.679

M3 - Article

AN - SCOPUS:84856076877

VL - 58

SP - 679

EP - 685

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 - 11

ER -