書誌事項
- タイトル別名
-
- Effect of Strain Rate on the Creep-Fatigue Damage of Ni-Base Superalloy at Elevated Temperatures
抄録
<p>Ni-based auperalloys are used in harsh high-temperature creep-fatigue environments. It has been reported that the lifetime is drastically decreased under creep-fatigue loads. However, the details of the mechanism of significant strength degradation in these environments have not yet been clarified. In this study, the authors focused on the strain rate during the creep-fatigue loads as a new dominant factor in the damage acceleration mechanism of Ni-based superalloys. Electron backscatter diffraction (EBSD) was used for continuous observation of the change in Image Quality (IQ) value of grains and grain boundaries under the different strain rate, 10 N/s and 100 N/s. As a result, it was found that the IQ value decreased significantly at grain boundaries perpendicular to the load when the strain rate was high. In the creep-fatigue test, the initial intergranular cracking started to appear at the grain boundaries perpendicular to the load when their IQ value degraded to 80 % of that of the received material. In addition, intergranular cracking occurred at grain boundaries which consisted of the difference in Schmid factor larger than 0.03.</p>
収録刊行物
-
- M&M材料力学カンファレンス
-
M&M材料力学カンファレンス 2021 (0), OS0815-, 2021
一般社団法人 日本機械学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390854717687195904
-
- ISSN
- 24242845
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- Crossref
-
- 抄録ライセンスフラグ
- 使用不可