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根据0点阵理论计算了fcc/bcc和fcc/bct在三种取向关系时的0点阵单胞体积V~(0).按V~(0)越大,该取向越稳定的判据,得知不同取向关系有各自合理存在的γ值范围。当γ值取某些特定值,就出现能量最低的二维0线点阵。业已提出,溶质原子可能局部偏析或贫化,使界面处γ值发生变化而降低界面的位错密度。α/β黄铜中Zn的偏析可以用这个模型加以解释。业已表明,四方畸变的大小和方向对V~(0)影响显著。如果已知fcc/bct的取向关系,就可以预示合理的畸变方向。但是,要说明Fe-C合金中取向关系由K-S转变成N-W的事实,得假定碳原子偏析到界面内的<11(?)>_f方向。
According to the lattice theory of zero, the lattice density of lattice 0 of fcc / bcc and fcc / bct at three orientations was calculated. According to the criterion V 0 0, the more stable the orientation, We know that the different orientation relations have their own reasonable range of γ values. When a certain value of γ is taken, a two-dimensional 0-line lattice with the lowest energy appears. It has been proposed that the solute atoms may be locally segregated or depleted, changing the γ value at the interface and decreasing the dislocation density at the interface. Segregation of Zn in α / β brass can be explained by this model. It has been shown that the magnitude and direction of the quadrilateral distortion have a significant effect on V ~ (0). If you know the orientation of fcc / bct, you can predict the reasonable direction of distortion. However, to illustrate the fact that the orientation of the Fe-C alloy is changed from K-S to N-W, it is assumed that the carbon atoms segregate to the <11 (?)> _f direction in the interface.