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利用Gleeble1500热/力模拟机研究了Ti14合金在应变速率为5×10-3～5 s-1,变形温度为1273～1423 K,变形量为60%条件下的半固态塑性变形行为。分析了合金流变应力与应变速率、变形温度之间的关系,根据分析结果建立了Ti14合金半固态变形流变本构方程,结果表明:合金在半固态条件下存在明显的屈服现象,流变应力受温度和应变速率影响较大,稳态流变应力和峰值流变应力随温度的增加而减小,相同温度下,流变应力随应变速率的增加而增加,分析可能是由于液相含量和分布对初生α-Ti骨架的解聚作用所致。
The semi-solid plastic deformation behavior of Ti14 alloy under the conditions of strain rate of 5 × 10-3 ~ 5 s-1, deformation temperature of 1273 ~ 1423 K and deformation of 60% was studied by using Gleeble1500 heat / force simulator. The relationship between flow stress and strain rate and deformation temperature was analyzed. According to the analysis results, the constitutive equations of semi-solid deformation of Ti14 alloy were established. The results show that there exists obvious yield phenomenon in semi-solid state, Stress is greatly influenced by temperature and strain rate. Steady-state flow stress and peak flow stress decrease with increasing temperature. At the same temperature, the flow stress increases with the increase of strain rate. The analysis may be due to the liquid phase content And disaggregation of the primary α-Ti framework.