インコネル718の中高温における疲労き裂の発生および伝ぱ挙動

Translated title of the contribution: Initiation and Growth Behavior of a Fatigue Crack in Inconel 718 at Elevated Temperatures

陳 強, 皮籠石 紀雄, 後藤 真宏, 西谷 弘信, 近藤 英二, 大園 義久

Research output: Contribution to journalArticlepeer-review

Abstract

Rotating bending fatigue tests were performed for Inconel 718 at room temperature and elevated temperatures of 300°C, 500°C and 600°C to investigate the influence of temperature on the fatigue crack initlation and its propagation. Although the propagation of a micro-crack smaller than about 20 μm is suppressed at elevated temperatures, that of the larger-crack is accelerated inversely. These results were discussed from the viewpoints of the softening of matrix and the oxidation of surface caused by the high temperature.
Translated title of the contributionInitiation and Growth Behavior of a Fatigue Crack in Inconel 718 at Elevated Temperatures
Original languageJapanese
Pages (from-to)1954-1961
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume65
Issue number637
DOIs
Publication statusPublished - Sep 25 1999

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