Mechanism-Based Theories of Strengthening and Hardening for Alloy Design and Processing

用于合金设计和加工的强化和硬化机制理论

• 批准号: 0084980
• 负责人: YongGang Huang
• 金额: $ 40万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084980&HistoricalAwards=false
• 关键词: Mechanism; Based; Theories; Strengthening; Hardening

Mechanism-Based Theories of Strengthening and Hardening for Alloy Design and ProcessingWe plan to conduct a systematic study of precipitate hardening of aluminum alloys based on mechanism-based strain gradient (MSG) plasticity. A unit-cell model will be used to represent dispersed particles in an aluminum matrix. The size of the particle ranges from a tenth of a micron to tens of microns. The size of the representative cell is determined by the particle size and volume fraction. A computer code based on finite element methods for MSG plasticity will be developed to predict macroscopic mechanical properties as particle size, shape and distribution are varied at a fixed volume fraction. This code will be validated by benchmark analytical solutions associated with void growth in aluminum. The predictions will be compared to existing experimental data and tested by further experiments to be conducted in ALCOA.***

基于机制的合金设计和加工强化和硬化理论我们计划基于基于机制的应变梯度（MSG）塑性对铝合金的沉淀硬化进行系统的研究。 将使用单胞模型来表示铝基体中的分散颗粒。 颗粒的大小从十分之一微米到几十微米不等。 代表性细胞的大小由颗粒大小和体积分数决定。 MSG塑性有限元方法的基础上开发的计算机代码将预测宏观力学性能的颗粒尺寸，形状和分布在一个固定的体积分数变化。 该代码将通过与铝中空洞生长相关的基准分析解决方案进行验证。 这些预测将与现有的实验数据进行比较，并通过在ALCOA进行的进一步实验进行检验。