变形量对TC25钛合金饼坯组织和力学性能的影响

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基金项目:

国家重点研发计划(2016YFB0701305)；陕西省重点研发计划(S2017-ZDYF-YBXM-GY-0642)

Influence of Deformation on Microstructures and Mechanical Properties of TC25 Titanium Alloy Cake Billet

1. NLEL for Special Titanium Alloy Material Manufacturing, Western Superconducting Technologies Co. Ltd, Xi'an 710018, China;
2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;
3. AECC Xi'an Aero-Engine LTD, Xi'an 710021, China

摘要: 将Ф240 mm TC25钛合金坯料在T_β+25℃温度下保温一段时间后锻制成饼坯, 研究20%、40%和60%三种典型变形量对饼坯的组织和拉伸力学性能的影响。结果表明, 三种变形量的饼坯显微组织均由多个平直的束状α相互相交错形成网篮组织;随着变形量的增加, 平直的束状α相减少, α相方向性减弱, 长条α相尺寸减小;同时, 随着变形量的增加, 拉伸强度增强。
- TC25钛合金 /
- 显微组织 /
- 力学性能 /
- 束状α相
Abstract: After maintained at T_β+25 ℃ for a certain period of time, the Ф240 mm TC25 titanium alloy bars were forged into cake billets with the deformations of 20%, 40% and 60%, and the microstructures and tensile mechanical properties of the TC25 titanium alloy cake billets were investigated.The results showed that the microstructures of the TC25 titanium alloy cake billets of different deformations were all basket weave structure with flat fascicular α phases intertwining each other.With the increase of deformation, the number of the flat fascicular α phases decreased, the orientation of α phases weakened and the size of stripα phases decreased.Meanwhile, as the deformation increased, the tensile strength of TC25 titanium alloy improved.
- TC25 titanium alloy /
- microstructure /
- mechanical property /
- packet α phase