東北大学 · 工学
Run-Zi Wang教授の研究室は、高温環境下での構造材料のクリープ・疲労挙動とその信頼性評価を主軸とした研究を展開しています。特に、GH4169やInconel 718といったニッケル基超合金を対象に、微視的組織変化とマクロ的力学挙動の関係を解明し、寿命予測のための統一的Viscoplasticityモデルや損傷評価手法の構築を進めています。また、実用的な設計指針に結びつけるため、応力・ひずみ履歴に応じた損傷累積評価法や、酸化を含む複合損傷メカニズムの数値予測技術の開発も行っています。
Figures are computed from collected data and may differ slightly.
High-reliability life design process not only can ensure system safety in service, but also can provide scientific life management during the maintenance period. The objective of the present work is to develop a roadmap for creep-fatigue reliability assessment. Material-level data accumulations and theoretical foundations of creep-fatigue including creep-fatigue constitutive and multi-axial damage models are introduced. Afterwards, a low-pressure turbine disk under a typical creep-fatigue load w
In this paper, a series of strain-controlled fatigue and creep–fatigue tests under proportional/non-proportional loadings were performed for type 304 stainless steel at 873 K. Then, post-test metallographic observations were performed through the electron back scattered diffraction (EBSD) and transmission electron microscope (TEM) combinative characterizations. In this aspect, the wavy slip dominated deformation mechanism under non-proportional loadings was considered as the essence for addition
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