報告書番号

T00059

タイトル（和文）

ガスタービン動翼のミニチュアサンプル破壊試験法 -第1報：破壊試験手法の構築と試験装置の開発-

タイトル（英文）

Destructive life evaluation method for the gas turbine blade (1st report: Construction of destructive evaluation method and development of destructive testing machines)

概要 （図表や脚注は「報告書全文」に掲載しております）

ガスタービン動翼の破壊試験手法の開発の第1歩として，動翼から採取した微小試験片を対象とした熱疲労試験機およびクリープ試験機の開発を行った．熱疲労試験機は赤外線集光加熱装置と圧縮空気による冷却装置を具備し，実機と類似した熱応力条件を模擬することが可能である．開発した試験機を用いて，温度勾配試験，等温疲労試験，および単調クリープ試験を実施し，試験機の基本的な試験性能を検証した．

概要 （英文）

Gas-turbine blades are suffered from sevior damages under the complicated temperature and strain conditions due to obtain higher turbine inlet gas temperature for improving the generating efficiency, so that to estimate the remain life of them are very difficult and the sufficient remain life prediction method has not been established. The destructive failure anarysis is one of the possible solution for this as the blades are subjected directry to the destructive tests under the conditions similar to the real gas-turbines. Here, a miniature thermo-mechanical fatigue (TMF) testing machine and a miniature creep testing machine are developped as the first step of developping the destructive failure anarysis method. A concentrated infrared ray heating device and a compressed air cooling device are attached on the TMF machine, so that the specimen can be tested under the complexed thermal restraint conditions as same as the real gas-turbine blades. Some basic tests, i.e., thermal gradient, iso-thermal fatigue, and monotonic creep tests were carried out and the basic testing capabilities are verified by the results.

報告者

キーワード