(北京航空材料研究院，北京 100095)
摘 要: 600~1 100 ℃時(shí)對(duì)IC10合金進(jìn)行同相位、反相位、135˚相位和−135˚相位的應(yīng)變控制熱機(jī)械疲勞實(shí)驗(yàn)。發(fā)展了一種三參數(shù)冪函數(shù)能量方法的壽命預(yù)測(cè)方法，并用于材料的熱機(jī)械疲勞壽命預(yù)測(cè)。對(duì)Manson-Coffin方程、拉伸遲滯能模型(Ostergren)、基于微裂紋擴(kuò)展模型的能量方法和三參數(shù)冪函數(shù)能量方法熱機(jī)械疲勞壽命預(yù)測(cè)能力進(jìn)行評(píng)估，結(jié)果表明：材料的熱機(jī)械疲勞應(yīng)力—應(yīng)變滯后回線的形狀與溫度—機(jī)械載荷之間的相位角有關(guān)；溫度—機(jī)械載荷之間的相位角對(duì)材料的熱機(jī)械疲勞性能有一定的影響；三參數(shù)冪函數(shù)能量方法物理意義明確，形式簡(jiǎn)單，壽命預(yù)測(cè)結(jié)果分布在2倍的分散帶內(nèi)，可以用來(lái)預(yù)測(cè)IC10合金的熱機(jī)械疲勞壽命。
關(guān)鍵字: IC10合金；熱機(jī)械疲勞；同相位；反相位；壽命預(yù)測(cè)
life prediction in superalloy IC10
（Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:Four types of test thermomechanical fatigue including in-phase, out-of-phase, 135˚ phase angle and −135˚ phase angle were performed on superalloy IC10, at a temperature ranging from 600 to 1 100 ℃. A three-parameter strain energy function was developed for thermomechanical fatigue (TMF) life. The life prediction capability of Manson-Coffin equation, Ostergren method, the model based on microcrack propagation and a new method were evaluated by using superalloy IC10 TMF data. The experimental results show that the stress—strain loop depends on the loading form. The phase angle between the temperature and mechanical loading affects the thermomechanical fatigue life. The results of TMF life prediction show that this new method is better than Manson-Coffin equation, Ostergren method and the model based on microcrack propagation, so this new method can be used to predict the TMF life of superalloy IC10.
Key words: superalloy IC10; thermomechanical fatigue; in-phase; out-of-phase; life prediction
