抄録
Effects of rolling reduction and amount of La2O3 dopant on the development of annealing textures in dispersion strengthened molybdenum sheet were investigated by means of X-ray diffraction technique. The components of rolling and primary recrystallization textures in the dispersion strengthened molybdenum sheet were substantially similar to those obtained for other refractory b.c.c. metals, i.e. three principal components {100} <011>, {111} <hkl> and {112} <110>, regardless of whether rolling reduction of 85 to 95 % or amount of La2O3 dopant of 0.01 to 1.0 mass % was incorporated. At a high temperature anneal, however, different components were developed as a result of secondary recrystallization (abnormal grain growth), i.e. one component of near {100} <011> for the sheet rolled to a reduction of 95 % and doped with 0.01 mass % La2O3, and a strong component of near {112} <110> for the sheets doped with 1.0 mass% La2O3 and rolled to 85% and 95%.
Consequently, the main components of secondary grains developed from dispersion strengthened molybdenum sheets corresponded to weak components in the primary recrystallization textures and were related by a rotation of approximately 20°-30° about <110> axis relative to the strong primary {100} <001> and {111} <110> components.
