相场法模拟弹性场对沉淀相变组织演化及相平衡成分的影响

Phase-field simulation of the influence of elastic field on microstructure evolution and equilibrium composition of precipitation

采用相场法模拟沉淀组织在不均匀共格本征弹性场及外加约束弹性应变作用下的演化历程,探讨了不均匀共格本征弹性场及外加约束弹性应变对共格沉淀组织演化的影响规律,并分析了弹性场在沉淀相变中对基体与沉淀相的平衡成分的影响.

We have simulated the microstructure evolutions of coherent single precipitate and multi-precipitates with inhomogeneous eigen elastic field and applied external strain using phase-field method. The influences of the inhomogeneous eigen elastic field and applied external strain on the morphology pattern of the coherent precipitate are discussed, and the effect of the elastic field on the equilibrium compositions of the precipitate and the matrix phase is also analyzed.