本文确定了超塑变形多重机制效应的存在,并根据这个效应,分析了超塑变形的主要参数,m,P和Q_a的变化规律及产生这些变化的原因.
The change of the characteristic parameters, strain rate sensiti-vity m, activation energy Q_a and grain size exponent P with changing strain rateand temperature and their physical reason have be n analysed according to the mul-tiple machanism effect in superplastic deformation. Their quantitative expressionshave also been given.
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