Theoretical Studies of Subgrain Formation and the Evolution of Texture in Metals

9414376哈夫纳，这项研究的目标是通过调查FCC对硬化理论的有限应变织构预测，对硬化理论与实验数据进行全面评估。晶体聚集体和塑性变形过程中渐进亚晶形成(包括亚晶壁中的微剪切带)的基本实验现象的数学预测和分析。这些目标的实现将提供以前无法获得的关于特定金属中织构形成的硬化理论的比较评估，并为随着变形的增加而继续形成亚晶和微观剪切带提供分析基础。这项研究有可能发展模型和本构方程，以加强对金属大变形过程的理解，并可能导致新的计算程序的开发。这样的代码可能对预测金属成形和制造过程的结果有用。***

9414376 Havner The objectives of this research are a comprehensive assessment of hardening theories against experimental data through investigation of their finite-strain texture predictions in f.c.c. crystalline aggregates and mathematical prediction and analysis of the basic experimental phenomenon of progressive subgrain formation (including microshear bands in subgrain walls) during plastic deformation. Achievement of these objectives would provide a comparative assessment, previously unavailable, of hardening theories in relation to texture formation in specific metals and an analytical basis for continued subgrain formation and microshear- band development with increasing deformation. This study has the potential to develop models and constitutive equations that will enhance the understanding of large deformation processes in metals and could lead to the development of new computational codes. Such codes might be useful for the prediction of the results of metal forming and manufacturing processes. ***