摘要
Ⅰ. INTRODUCTIONThe index m value of strain rate sensitivity is an important mechanical factor for evaluating superplasticity. The authors have established the analytically mechanical theories of m value on the basis of many formulae for measuring rn value by means of tension and have given out a unified measuring methodt. m value is affected by stress status because
基金
Project supported by the National Natural Science Foundation of China.
