Constant Structure Experiments for Rate-Dependent Deformation of Metals

这项调查的目的是改善 金属热加工本构模型的准确性。 目前，复杂成形过程的模拟，如 挤压、锻造和超塑性成形， 使用有限元方法和本构方程。 然而，缺乏适当的数据作为这些建议的依据。 方程 金属的速率相关流动将是 通过详细的常数进行系统研究， 高纯度多晶铝的结构实验。 如此生成的独特数据应导致更适当的流动 方程中包含内部变量， 公式化。

This investigation has the objective of improving the accuracy of constitutive models for the hot working of metals. Currently, the simulation of complex forming processes, such as extrusion, forging and superplastic forming, has been modeled using finite element methods and constitutive equations. However, there is a lack of proper data upon which to base these equations. The rate dependent flow of metals will be systematically investigated by means of detailed constant- structure experiments on high-purity, polycrystalline aluminum. The unique data so generated should lead to more appropriate flow equations that incorporate internal variables in their formulation.