Estimation of the lifetime of nickel base turbine blades by using elastic strain measurement

利用弹性应变测量估算镍基涡轮叶片的寿命

• 批准号: 15360369
• 负责人: TANAKA Katsushi
• 金额: $ 8.64万
• 依托单位: KYOTO UNIVERSITY (2005-2006)Kagawa University (2003-2004)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360369/
• 关键词: superalloy; creep deformation; raft structure; phase stability; elastic constants; elastic strain energy; 弾性緩和; 非破壊検査; ラフト組織; 異方的弾性歪

Development of elastic strain in nickel base super alloy during creep deformation has been investigated. The results show that the change in elastic strain is owing to stack creep dislocations at gamma gamma-prime interfaces. Theoretical calculations about the stability of microstructure indicate that the raft structure is stabilized by a small amount of creep dislocations, however, the raft structure is destabilized by a large amount of creep dislocations. The critical amount of creep dislocations agrees with that for perfectly accommodate the lattice misfit between gamma and gamma-prime phases. In the destabilized raft structure, the most stable lamellar plane normal is not the [001] direction but that tilted toward the <111> direction. This is the reason why the raft structure collapses during the creep deformation. The measurement of elastic strain is useful to detect an early stage of creep deformation, however, the measurement is less sensitive to the change occurred in a later stage of its lifetime.

研究了镍基高温合金蠕变过程中弹性应变的发展。结果表明，弹性应变的变化是由γ - γ -素数界面处的叠层蠕变位错引起的。微观结构稳定性的理论计算表明，少量蠕变位错对筏板结构具有稳定作用，但大量蠕变位错会使筏板结构失稳。蠕变位错的临界量与完全适应与初始相之间晶格失配的临界量一致。在失稳筏结构中，最稳定的板层平面法向不是[001]方向，而是向<111>方向倾斜。这是筏板结构在蠕变过程中发生垮塌的原因。弹性应变的测量有助于检测蠕变的早期阶段，然而，测量对其生命周期后期发生的变化不太敏感。

项目成果

The broadening of Crystallographic Orientation Distribution in Crept Ni-Base Superalloys

蠕变镍基高温合金晶体取向分布的拓宽

• 发表时间: 2007
• 期刊: Mat. Res. Soc. Symp. Proc. 980
• 作者: T.Inoue;K.Tanaka;H.Adachi;K.Kishida;H.Inui
• 通讯作者: H.Inui

Change in the Stability of Raft Structure in Nickel Base Superalloys During Creep Deformation

镍基高温合金筏结构蠕变变形稳定性的变化

• 发表时间: 2006
• 期刊: Proc. of the Fifteenth International Symposium on Processing and Fabrication of Advanced Materials
• 作者: K.Tanaka;T.Ichitsubo;K.Kishida;H.Inui
• 通讯作者: H.Inui

Variation of internal elastic and/or plastic strain with collapsing the raft structure in nickel base superalloys

镍基高温合金筏结构塌陷时内部弹性和/或塑性应变的变化

• 发表时间: 2006
• 期刊: Annual report of 123th committee of JSPS Vol.47, No.3
• 作者: K.Tanaka;T.Inoue;K.Kishida;H.Inui
• 通讯作者: H.Inui

弾塑性論から見たラフト組織の安定性と寿命予測への応用

弹塑性理论视角下的筏板结构稳定性及其在寿命预测中的应用

• 发表时间: 2007
• 期刊: 耐熱鋼および耐熱合金の組織安定性と寿命推定フォーラムシンポジウム講演集
• 作者: 田中克志;井上暢;岸田恭輔;乾晴行
• 通讯作者: 乾晴行

Ni基超合金のラフト構造崩壊に伴う内部弾性・塑性歪の変化

镍基高温合金筏板结构塌陷引起的内部弹塑性应变变化

• 发表时间: 2006
• 期刊: 耐熱金属材料123委員会研究報告 47・3
• 作者: 田中克志;井上暢;岸田恭輔;乾晴行
• 通讯作者: 乾晴行