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应用耦合共格弹性畸变的微观弹性相场法研究D022型Ni3(V,Al)相沉淀过程中的应力取向效应。结果表明,在弹性内应力作用下,D022沉淀相表现出明显的位向性:相颗粒倾向于沿应力软方向[100]生长而在[001]方向受抑制,即生长方向与长轴[001]方向垂直,D022相最终沉淀形貌呈“层”状;沉淀过程中三类D022相变体相互协调以减小共格畸变能,最终D022-variant Ⅲ消失,存留的两类中D022-variant Ⅰ体积比占优。
Study on the Stress Orientation Effect in the Precipitation Process of D022 Type Ni3 (V, Al) Phase by Coupling Elastic Coefficient of Elastic Distortion. The results show that D022 precipitates show obvious orientation under the elastic internal stress. Phase particles tend to grow along the soft stress direction [100] and are restrained in the [001] direction, ie, the growth direction and the long axis [001 ], The final precipitated morphology of D022 phase is “layer” shape. During the precipitation process, the three types of D022 phase transformation body coordinate with each other to reduce the coherent distortion energy, and the final D022-variant Ⅲ disappears. D022 -variant Ⅰ volume ratio dominated.