按照位错攀移模型，提出一种第二阶段蠕变机理。
A mechanism for secondary stage creep has been proposed according to the climbing model.
随着温度的升高和应力的增加，DZ 4合金蠕变第二阶段的时间迅速减少。
The second moment creep time of DZ4 superalloy rapidly decreases with the increasing of temperature and stress.
造成软岩蠕变加速阶段出现的原因是损伤起始于或明显显现于蠕变第二阶段之末。
The new equation correctly reflects such a fact as that the creep damage starts or appears at the end of the second stage and results in the accelerating creep and failure.
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