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摘要: 研究了温度在-100～400 ℃、应变率在10-5～103 s-1范围内温度和应变率的变化对钽的流动应力的影响。结果表明，钽的流动应力对温度和应变率的变化相当敏感。同时还就两种本构模型对钽的温度效应与应变率效应的不同处理方法作了比较，指出Zerilli-Armstrong模型能更好地描述温度与应变率对钽流动应力的影响。Abstract: The influence of temperature and strain rate on the flow stress of tantalum under temperature range from -100 ℃ to 400 ℃ and strain rate from 10-5 s-1 to 5103 s-1 was studied. The results showed that the flow stress of tantalum was very sensitive to the changes of temperature and strain rate. Two theoretical methods were compared, and Zerilli-Armstrong model was found to be more satisfactory to describe the dependence of the flow stress on temperature and strain rate.
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Key words:
- tantalum /
- effect of temperature and strain rate /
- flow stress /
- constitutive /
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