A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials 论文
1963Journal of Applied Physics引用 2278
High Temperature Alloys and CreepAdvanced Mathematical Modeling in EngineeringAluminum Alloys Composites Properties
详细信息
- 发表期刊/会议
- Journal of Applied Physics
- 发表日期
- 1963-06-01
- 发表年份
- 1963
关键词
High Temperature Alloys and CreepAdvanced Mathematical Modeling in EngineeringAluminum Alloys Composites Properties
摘要
The creep rate (ė) predicted by the boundary diffusion (Db) model is ė≃150σDbWΩ/(GS)3kT, where σ is the stress, W is the boundary width, (GS) is the average grain size, and Ω is vacancy volume. The stress dependence is the same as the lattice diffusion model, given by C. Herring, while the grain size dependence and the numerical constant are greater for boundary diffusion. Discussion of the mechanism of creep in polycrystalline alumina is based on the differences between the lattice and boundary diffusion models.