Method for predicting long-range creep life of high-temperature alloy

• Main Authors: WANG FAN, ZHAO PENGFEI, CHEN YING, ZHAN SHUANGJIAN
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; PHYSICS

The invention discloses a method for predicting the long-range creep life of a high-temperature alloy, which comprises the following steps of: considering a deformation mechanism and an oxidation factor, and describing a constitutive relationship among a steady-state creep rate, stress and temperature by using a power-law relationship model; using a deformation mechanism diagram to distinguish deformation mechanisms under different stress and temperature states, and selecting a proper steady-state creep rate model; and investigating the loss of the outer sectional area, introducing a long-time oxidative damage variable, and accurately predicting the long-time creep life of the high-temperature alloy. 本发明公开了一种高温合金的长程蠕变寿命预测方法，其考虑变形机制与氧化因素，使用幂律关系模型来描述稳态蠕变速率与应力、温度的本构关系；使用变形机制图来区分不同应力、温度状态下的变形机制，选择合适的稳态蠕变速率模型；考察外截面积损失，引入长时氧化损伤变量，准确的进行高温合金长时蠕变寿命的预测。