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以新型阻燃合金Ti14合金(α+Ti2Cu)为对象,研究了Ti合金在固态和半固态变形的组织演变过程,分析了温度和变形量对合金晶粒形态和晶界特征的影响,结果表明:半固态条件下未发生动态再结晶,使得晶粒粗大,温度影响了液相的析出,随着温度的升高,液相析出量增加,并集中在晶界处,使得晶界宽化,由不连续转变为连续分布;变形量改变了晶界的界面能,促使晶界发生迁移和转动,导致弯曲的晶界向其曲率中心方向移动,三叉晶的交角向120°趋近。
Based on the new type of Ti14 alloy (α + Ti2Cu), the microstructure evolution of Ti alloy during solid and semi-solid deformation was studied. The effects of temperature and deformation on the grain morphology and grain boundary properties were analyzed. : Under the condition of semi-solid, dynamic recrystallization did not occur, making the crystal grains coarse and the temperature affected the precipitation of liquid phase. With the increase of temperature, the amount of liquid phase precipitation increased and concentrated at the grain boundaries, From discontinuous to continuous distribution; the amount of deformation changes the interfacial energy of the grain boundary, prompting the grain boundary migration and rotation, resulting in the bending of the grain boundary to the center of curvature of the movement, trigeminal angle approaching 120 °.