金属在热成形过程中的微观组织演变是影响产品力学性能的关键因素，该演变过程取决于温度、应变和应变速率。
The microstructure evolution, which is governed by temperature, strain and strain rate during hot metal forming, is a key factor to the mechanical properties.
由此可以给出超塑性变形时应变和应变速率区的限度，有益于指导实际的超塑性成型。
From this, the Limit of strain rate and strain of superplasticity can be given, and this is useful for practice of deformation with superplasticity.
海冰对应变速率变化较敏感，在不同应变速率范围内可表现出不同的力学行为和强度特性。
Because of its strength sensitivity to strain rate, sea ice displays different mechanism behavior and strength features in different range of strain rate.
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