高强亚稳β钛合金变形机制及其组织调控方法

李金山, 唐斌, 樊江昆, 王川云, 花珂, 张梦琪, 戴锦华, 寇宏超

Deformation Mechanism and Microstructure Control of High Strength Metastable β Titanium Alloy

LI Jinshan, TANG Bin, FAN Jiangkun, WANG Chuanyun, HUA Ke, ZHANG Mengqi, DAI Jinhua, KOU Hongchao

图2 bcc金属材料中螺位错结构与形态特征分析[14,21,22] (a) differential displacement map illustrating the core structure of screw dislocations in bcc metals[21] (b) in-situ TEM observation of the screw dislocations during the straining of Ti-23Nb-0.7Ta-2Zr-0.4Si alloy (t—framing time. The imaging condition was indicated by the g vector and Burgers vector b, of dislocations. Dislocations with different morphological features were highlighted by A and B, respectively)[22] (c) dislocation dipoles in deformed microstructure of Ti-11.4Al-11.7Mo-1.9VSi alloy (A diffraction pattern along<11ˉ0> zone axis was inserted to ease the identification of Burgers vector of observed dislocations)[14]

Fig.2 Characterization of the core structure and morphology of screw dislocations in bcc metallic materials