Orientation dependence of texture evolution in cold-rolled Ni3Al single crystals
Orientation dependence of texture evolution in cold-rolled Ni3Al single crystals
复制标题
冷轧 Ni3Al 单晶织构演化的取向依赖性
DOI：
10.1080/1478643031000149117
复制
发表时间：
2003
影响因子：
1.6
通讯作者：
T. Hirano
中科院分区：
文献类型：
--
作者：
K. Kishida;M. Demura;Y. Suga;T. Hirano
研究了二元化学计量比Ni3Al单晶冷轧薄片的织构随初始取向的变化规律。在初始轧制方向(RD)接近⟨0 0 1⟩的情况下，与带状组织相关的双{110}{112}织构倾向于发展，而与初始箔法向方向(ND)无关。这些带状结构的箔的宏观形状是直的，并沿RD简单地拉长，保持其矩形形状。相反，当初始Rd接近{112}时，织构和显微组织比较均匀，没有织构分裂和带状组织的形成。B组的箔片宏观上是弯曲、扭曲的，最终从样品的侧边破裂。在后一种情况下，晶格旋转的趋势随着初始ND的不同而不同。通过塑性应变分析发现，在冷轧Ni3Al单晶的情况下，带状组织的形成是制备薄直箔的关键。
Texture evolutions of cold-rolled thin foils of binary stoichiometric Ni3Al single crystals were examined as a function of the initial crystal orientation. In the cases of the initial rolling direction (RD) close to ⟨001⟩, a double {110} {112} texture associated with a banded structure tends to develop irrespective of the initial foil normal direction (ND). The macroscopic shape of these foils with the banded structure is straight and simply elongated along RD, keeping their rectangular shape. In contrast, when the initial RD is close to {112}, the texture and the microstructure are rather uniform without the texture splitting and the banded structure formation. The foils of group B are macroscopically curved, twisted and eventually cracked from the side edge of the samples. Tendencies of the lattice rotations vary with the initial ND in the latter case. According to the plastic strain analysis, the formation of the banded structure is found to be essential for fabricating the thin straight foils in the case of the cold rolling of Ni3Al single crystals.