Control of Microstructure Against Strain Localization During Deformation Processing

这项研究涉及单晶和多晶韧性材料体系应变局部化的实验研究，分析了这些材料体系中中、大塑性应变的微观局部化机制，如剪切带，以及塑性材料有效塑性响应的本构关系的发展，包括复杂的多滑移硬化、颗粒和气孔的影响，和微观剪切局部化。其目标是开发技术以达到最佳的工艺条件，从而避免不希望的流动局部化。

This research involves experimental investigations of strain localization on single - and poly-crystalline ductile-matrix material systems, analyses of mechanisms of micro-localization, e.g. shear banding, at intermediate and large plastic strains in these material systems, and the development of constitutive relations for the effective plastic response of ductile materials including the effects of complex multi-slip hardening, particles and pores, and microscopic shear localizations. The goal is to develop techniques to achieve optimal processing conditions so as to avoid undesirable flow localizations.