1252 インコネル718の中高温疲労におけるき裂伝ぱ抵抗(G03-9 材料力学(9)疲労・強度2,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

論文の詳細を見る
Rotating bending fatigue tests were carried out using specimens with a small blind hole for Inconel 718 with different grain sizes, about 18, 88 and 276μm, at room temperature and 500℃ in order to investigate the effects of grain size and temperature on the growth resistance of a fatigue crack. Crack growth rates were determined by the term σ_a^na(a:surface crack length, n:constant), uniquely in all of the materials and at both temperatures. Both of the static strength and the resistance to crack growth were decreased by softening at 500℃. The decrease in the resistance to crack growth was larger than that in the static strength. This was mainly explained from the difference in Young's modulus' at the both temperatures.
社団法人日本機械学会の論文
2008-08-02