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金属学报  2013 

反应堆控制棒材料Ag-In-Cd合金的压缩蠕变行为

DOI: 10.3724/SP.J.1037.2013.00247, PP. 1012-1016

Keywords: Ag-In-Cd合金,压缩蠕变,层错

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Abstract:

研究了铸态Ag-In-Cd合金在300—400℃及12—24MPa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Qa,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24MPa时,合金的Qa值分别为68.1,103.7和131.6kJ/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—24MPa下的压缩蠕变控制机制.

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