摘要
根据引线框架Cu-Fe-P合金精轧后表层断裂处形状各异Fe颗粒的组织几何形态,建立有限元数值分析模型,主要研究了不同Fe颗粒形状下残余应力对基体与界面处应力集中现象的影响。数值分析表明,随着颗粒尖角程度的增加,Fe颗粒和Cu基体界面处存在剧烈的应力集中和较大的残余应力,从而导致铜合金薄带表层断裂。因此在引线框架铜合金的生产过程中,应避免较大的尖角Fe颗粒存在。
The effect of Fe particle shapes on residual stress concentrated near the interface of Cu matrix and Fe particle in three models are researched. Finite element model is established based on microstructure of various Fe particle shapes in surface fractured Cu-Fe-P alloy sheet after finish rolling. The numerical result shows that, the equivalent stress and strain mismatch between the interface of Fe particles and Cu matrix is the main factor of surface fracture in the copper alloy lead frame sheet, especially with sharp Fe particles.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2007年第B08期359-362,共4页
Transactions of Materials and Heat Treatment
基金
河南科技大学博士科研启动基金
关键词
模拟分析
表层断裂
残余应力
颗粒形状
simulation analysis
surface fracture
residual stress
shape of Fe particle
