对IC10定向凝固高温合金进行了450~990℃热/机械疲劳裂纹扩展行为的试验研究.分别研究了相位角、保持时间、温度、频率对IC10合金裂纹扩展行为的影响,并建立了热/机械疲劳裂纹扩展速率预测模型.研究发现:温度的升高和频率的降低均会加速裂纹扩展;同相位热/机械疲劳裂纹扩展速率大于反相位热/机械疲劳裂纹扩展速率,而且它们两者介于最大温度和最小温度的等温疲劳裂纹扩展速率之间;载荷保持加速裂纹扩展.
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