Microcosmic phase field analysis method in age forming and pre-ageing process

The invention discloses a microcosmic phase field analysis method in the age forming and pre-ageing process. A phase field model with the atomic scales of a macroscopic/nano stress field coupled is adopted, pre-ageing tissue hereditary of age forming is simulated, the influence rule of a pre-ageing tissue forming mechanism to a pre-ageing tissue structure is analyzed according to different precipitation tissue transformation mechanisms, the influence of the pre-ageing tissue forming mechanism and the mechanism used for transforming pre-ageing tissue to age forming tissue on the hereditary effect is obtained, and the response relation of the age forming tissue dispersity and layout is obtained. The method includes the step of first pre-ageing tissue control and the step of the hereditary effect of the second pre-ageing tissue on the age forming tissue. According to the method, the age forming precipitated phase early-stage shape is changed fundamentally, hence, age forming ending tissue is optimized, crystalline grain largeness and orientation arrangement are eliminated, and the tissue shape of dispersion distribution and cross arrangement with the refined crystalline strengthening effect and the dispersion strengthening effect is achieved.