Constant Structure Experiments for Rate-Dependent Deformation of Metals

本研究的目的是提高金属热加工本构模型的精度。目前，对挤压、锻造和超塑性成形等复杂成形过程的模拟主要采用有限元方法和本构方程。然而，缺乏适当的数据来作为这些方程的基础。通过对高纯多晶铝进行详细的恒定结构实验，系统地研究了金属的速率相关流动。这样产生的独特数据应该会导致更合适的流动方程，在其公式中纳入内部变量。

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.