溶接学会論文集
Print ISSN : 0288-4771
MCrAlY合金コーティング部材の曲げ疲労寿命特性
高温耐食コーティング部材の寿命特性に関する研究(第4報)
伊藤 義康斉藤 正弘石渡 裕
著者情報
ジャーナル フリー

1998 年 16 巻 2 号 p. 252-257

詳細
抄録

The low-pressure plasma spray coating process has been established in the field of gas turbines and is used for parts (turbine blades, duct segments, etc.) which are exposed to corrosive gases at high temperatures. Overlay coatings based on the MCrAlY alloy system (M is Ni, Co or Fe) are commonly employed as oxidation-and corrosion-resistant coatings. Mechanical properties such as fatigue lives, of CoCrAlY coated system were investigated at high-temperature as compared with the uncoated unidirectional solidified CM247LC and single crystal CMSX-2.
Rotational bending fatigue properties of the CoCrAlY coated superalloy at high-temperature(1023 K) showed inferior performance in comparison with the uncoated results. It was because that the high stress due to Young's modulus difference was induced at the coating surface. It was also confirmed that the fatigue lives of CoCrAlY coating could be obtained by the rotational bending test.

著者関連情報
© 一般社団法人 溶接学会
前の記事 次の記事
feedback
Top