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研究了在蠕变过程中有相变发生的情况下,应用通过蠕变激活能提高温度、缩短蠕变试验时间的方法的可能性。为此,用三种耐热钢和一种铝合金分别在同一应力不同温度下,进行了一系列的蠕变试验.在蠕变试验前,对试样进行了适当的热处理,使得在蠕变试验温度下有预期的相变发生.实验结果指出,在试验温度范围内,其中两种试样存在恒定的”蠕变激活能”,另两种试样则不存在恒定的“蠕变激活能”.而在有意使得上述相变不发生的情况下,这四种试样在同样的试验温度范围内,都存在恒定的蠕变激活能.这说明“蠕变激活能”不仅决定于材料的成份,而且决定于组织结构.初步分析指出,在蠕变过程中有相变发生的情况下,这种外推方法能否适用决定于相变的类型。
The possibility of applying the method of creep activation to increase the temperature and shorten the creep test time is studied in the case of a phase change during the creep process. For this reason, a series of creep tests were carried out with three kinds of heat-resisting steel and one kind of aluminum alloy respectively under the same stress and different temperature. Before the creep test, the sample was properly heat-treated, The expected phase transition occurs at the test temperature.The experimental results show that there are two “creep activation energies” in the two samples and the same “creep activation energy” in the other two samples “However, in the case of deliberately making the phase transition does not occur, the four samples in the same test temperature range, there is a constant creep activation energy.This shows that” creep activation energy "not only depends on the material Composition, but also depends on the organizational structure.A preliminary analysis indicates that whether the extrapolation method can be applied depends on the type of phase transition under the condition that a phase change occurs in the creep process.