Development of Computer-Assisted System for Microstructural Design and Control of Steel

钢组织设计与控制计算机辅助系统的开发

基本信息

批准号：
08305029
负责人：
ISHIDA Kiyohito
金额：
$ 5.82万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

Computer-assisted system for microstructural design and control of steels has been developed, which is concerned with (i) construction of database of physical properties and (ii) computation al approach of kinetics of phase transformation. The results obtained are as follows.1. The database on phase diagrams of iron base alloys has been constructed. The related papers after 1990 are collected which combines with the previous compilations by ASM International. This information is available for world -wide database service on the Internet by the use of an object-oriented database system MOOD.2. The database on diffusion coefficient of iron base alloys has been constructed. The relation between diffusion coefficients and melting point is analyzed. This method is useful for the estimation of diffusion data where there is no experimental information.3. The databease on the surface energy and viscosity of liquid phase in iron alloys has been constructed. The computational method of estimating surface energy is also presented.4. The interaction between C and alloying elements in ferrite is evaluated and it strongly affects the creep strength of carbon steels.5. Phase decomposition is predicted by computer simulation based on non-linear diffusion equation.6. Effect of magnetic and chemical ordering on phase equilibria is clarified. It is shown that the interaction between magnetic and chemical ordering significantly affects the phase stability.7. Solute drag effect is quantitatively analyzed when the grain boundary is moving.8. The relation between mean grain radii and volume fractions of alpha and beta phases of dual-phase is established.

已经开发了用于微观结构设计和控制钢的计算机辅助系统，这与（i）构建物理属性数据库以及（ii）相变动力学的计算方法。获得的结果如下1。已经构建了铁基合金相图的数据库。收集了1990年以后的相关论文，并结合了ASM International的先前汇编。通过使用面向对象的数据库系统情绪2。已经构建了铁碱合金扩散系数的数据库。分析了扩散系数与熔点之间的关系。此方法对于没有实验信息的扩散数据很有用3。已经构建了铁合金中液相的表面能和粘度的数据库。还提出了估计表面能的计算方法4。评估了C与铁氧体中合金元素之间的相互作用，并强烈影响碳钢的蠕变强度5。相位分解是通过基于非线性扩散方程的计算机模拟来预测的。6。阐明了磁和化学排序对相位平衡的影响。结果表明，磁性和化学排序之间的相互作用显着影响相位稳定性7。当晶界移动时，定量分析溶质阻力效应8。建立了双相的α晶粒平均半径与体积分数之间的关系。