期刊
PHYSICS OF METALS AND METALLOGRAPHY
卷 119, 期 1, 页码 92-102出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0031918X18010088
关键词
composites; Cu-Nb; structure; thermal stability
资金
- UB of RAS [18-10-2-24]
The microstructure and thermal stability of multifiber in situ Cu-18Nb composites with a true strain (e) of 10.2 and 12.5 have been studied by the methods of scanning and transmission electron microscopy and X-ray diffraction analysis. It has been established that niobium dendrites in the copper matrix acquire the shape of ribbons with thicknesses of less than 100 nm under strong plastic deformation. As the strain grows, the thickness of niobium ribbons decreases, and the degree of axial texture 110aNba center dot aEuro111 center dot DA (drawing axes) and the macrostresses in the crystal lattice of niobium increase. Interplanar distances between adjacent {110}Nb planes are stretched in the longitudinal section of the composites and reduced in their transversal section under the action of macrostresses. It has been shown that, as a result of the annealing of these composites, niobium fibers sustain coagulation, which begins at 300A degrees C, actively develops with increasing temperature, and leads to the appreciable softening of a composite at 700A degrees C. The softening of a composite after the annealing is accompanied by the relaxation of macrostresses in niobium and the recovery of its unit cell parameters to standard values.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据