(1. 西安交通大学 理学院，西安 710049；
2. 北京航空材料研究院 钛合金室，北京 100095)
摘 要: 合金织构是决定高强薄壁TA18钛合金航空管材综合力学性能的关键因素。针对不同规格、不同工艺条件下制备加工的TA18钛合金管材，利用X射线衍射技术对其织构进行测定与分析。对于服役条件不同于其他六方晶系的TA18钛合金，不能用TC、Kearns f 和Kallstrom f等因子来对织构进行定量表征，而应采用晶体取向分布函数(ODF)的两个极密度值及管径向与最大极密度点的夹角这3个参数。确立织构表征方法为研究管材织构尤其是织构密度对力学性能的影响奠定了基础。
关键字: TA18钛合金；管材；织构；极图；ODF
（1. School of Science, Xi’an Jiaotong University, Xi’an 710049, China;
2. Department of Titanium Alloy, Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:Alloy texture is a key impact on mechanical properties of high strength thin-wall TA18 tubing. The textures of different specification TA18 titanium alloy tubings manufactured by different processes were investigated by means of X-ray diffraction, and texture types and intensity of tubing were characterized by the pole figure and ODF. The pole figure and various quantitative parameters exist severe shortage when representing textures. It is appropriate to describe the tubing texture that the density of peak maximums in ODF and the included angle between the radial direction and the texture component were proposed. Based on the correct method, the study of texture effects on the mechanical behavior can be pushed on.
Key words: TA18 Ti alloy; tubing; texture; pole figure; ODF
