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 journalArticle

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.
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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