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研究了铸态Ag-In Cd合金在300—400℃及12—24 MPa压应力范围内的压缩蠕变行为,根据实验结果计算了表观应力指数n和表观激活能Q_a,探讨了合金的压缩蠕变机制.结果表明,随温度和应力的升高,合金的稳态蠕变速率增加,稳态蠕变速率与应力之间呈指数关系.温度为300,350和400℃时,合金的n分别为2.90,4.09和5.77;压应力为12,18和24 MPa时,合金的Q_a值分别为68.1,103.7和131.6 kJ/mol.位错运动形成大量层错是Ag-In-Cd合金在温度为300—400℃,压应力为12—24 MPa下的压缩蠕变控制机制.
The compressive creep behavior of as-cast Ag-In Cd alloy at 300-400 ℃ and 12-24 MPa was studied. The apparent stress exponent n and apparent activation energy Q_a were calculated according to the experimental results. Compressive creep mechanism.The results show that with the increase of temperature and stress, the steady-state creep rate of the alloy increases and the steady-state creep rate expresses an exponential relationship with the stress.When the temperature is 300, 350 and 400 ℃, Are 2.90, 4.09 and 5.77, respectively.The Q_a values of the alloys are 68.1,103.7 and 131.6 kJ / mol at compressive stress of 12, 18 and 24 MPa, 300-400 ℃, compressive stress at 12-24 MPa compression creep control mechanism.