摘要
γ/γ界面对(γ+α2)双相TiAl基合金的力学性能有着重要影响.采用矩阵方法系统地导出了该合金中标定γ相晶体学取向的变换矩阵.利用这些变换矩阵和汇聚束电子衍射技术对XDTM制备的Ti-47Al-2Mn-2Nb(原子分数, ％)+0.8TiB2(体积分数,％)合金中γ/γ界面关系及其统计分布进行了测定.
The γ/γ lamellar interfaces play a critical role in the mechanical properties of (γ+α2) two-phase TiAl-based alloys. The transformation matrices necessary for indexing the crystallographical orientations of γ lamella are systematically calculated. Based on these calculated matrices, the interface types between neighboring γ laths could be determined unambiguously. The frequency of different interface types in a Ti-47Al-2Mn-2Nb (atomic fraction, %) + 0.8TiB2 (volume fraction, %) alloy was measured by means of convergent-beam electron diffraction and compared with the frequency distribution in binary TiAl alloys.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第9期903-908,共6页
Acta Metallurgica Sinica
基金
德国Friedrich-Ebert基金资助项目
关键词
TIAL基合金
变换矩阵
γ/γ界面关系
汇聚束电子衍射
TiAl-based alloy, transformation matrix, γ/γ interface, convergent-beam electron diffraction
