スーパーアロイMIM材の疲労破壊特性

Translated title of the contribution: Fatigue Failure Properties of Injection Molded Superalloy Compacts

池田 光, 長田 稔子, 姜 賢求, 津守 不二夫, 三浦 秀士

Research output: Contribution to journalArticlepeer-review

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.
Translated title of the contributionFatigue Failure Properties of Injection Molded Superalloy Compacts
Original languageJapanese
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 15 2011

Fingerprint Dive into the research topics of 'Fatigue Failure Properties of Injection Molded Superalloy Compacts'. Together they form a unique fingerprint.

Cite this