(四川大学 制造科学与工程学院，成都 610065)
摘 要: 研究了脉冲磁场、脉冲电流、脉冲电磁处理对未变形TC11合金组织、晶格参数、位错、显微硬度的影响。结果表明：处理后合金中初生α相含量均增大，脉冲电流、脉冲电磁处理后合金中α相分别增加4%和3%(体积分数)，表示外场引入额外相变驱动力促进β相转变为α相。脉冲电磁处理后α相轴比c/a均增大，表明促进Al等元素在α相中固溶，α相得到强化。材料经脉冲电磁处理后，合金中位错缠结减少，表面显微硬度较初始材料下降2.6%。脉冲电流、脉冲磁场、脉冲电磁场处理并未使材料产生变形，可通过影响材料组织结构和位错的运动来实现材料性能调控。
关键字: TC11钛合金；电磁；组织；位错；硬度
（School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China）
Abstract:The effects of magnetic field(M), electropulsing(E) and electromagnetic(EM) treatment on the microstructure , lattice parameter, dislocations and microhardness of the undeformed solid TC11 alloy were investigated . The results show that the volume fractions of primary α phase increase by 4% and 3%, respectively, after E and EM treatment, indicating that the external fields can provide additional driving force for the phase transformation of β to α. The axis ratio c/a of α phase increases after the treatments, implying strengthened α phase by solid solution. Meanwhile, the dislocation entanglement density decreases and the surface microhardness is reduced after the EM treatment. A 2.6% decrease in hardness is produced. The presented study shows external field treatment can impose significant influence on the properties of the materials by altering microstructures and movement of dislocations of the material.
Key words: TC11 titanium alloy; electromagnetic; microstructure; dislocation; microhardness
