Crack Nucleation Due to Non-equilibrium Grain Boundaries in Random Polycrystals

无规多晶中非平衡晶界导致的裂纹成核

• 批准号: 9523028
• 负责人: Mao Wu
• 金额: $ 15万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9523028&HistoricalAwards=false
• 关键词: Crack; Nucleation; Due; Non; equilibrium

9523028 Wu This project is to study the local heterogeneities in polycrystalline materials and their effect on crack initiation. In particular, certain non-equilibrium grain boundary structures and morphologies and their associated nucleation stresses and resulting crack characteristics will be investigated. There exists some evidence that these non-equilibrium grain boundaries are found in submicron-grained and nanocrystalline materials. The results will be generally applicable to metallic systems and to certain ceramic materials. ***

9523028吴本项目是研究多晶材料中的局部非均匀性及其对裂纹萌生的影响。 特别是，某些非平衡晶界结构和形态及其相关的成核应力和由此产生的裂纹特性将进行研究。 有证据表明，这些非平衡晶界存在于亚微米晶粒和纳米晶材料中。 结果将普遍适用于金属系统和某些陶瓷材料。 ***