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

金属亚晶形成和织构演化的理论研究

• 批准号: 9414376
• 负责人: Kerry Havner
• 金额: $ 18.27万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-10-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9414376&HistoricalAwards=false
• 关键词: Theoretical; Studies; Subgrain; Formation; Evolution

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. ***

9414376 Havner本研究的目的是通过调查f.c.c.中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。结晶聚集体和数学预测和分析的基本实验现象的渐进亚晶粒形成（包括微观剪切带亚晶粒壁）在塑性变形。 这些目标的实现将提供一个比较评估，以前没有的，硬化理论有关的织构形成在特定的金属和分析基础的持续亚晶形成和微剪切带的发展与增加变形。 这项研究有可能开发模型和本构方程，这将提高对金属大变形过程的理解，并可能导致新的计算代码的开发。 这些代码可能是有用的金属成形和制造过程的结果的预测。 ***