The formation of modulated structures in Ni-V alloys
The formation of modulated structures in Ni-V alloys
复制标题
Ni-V 合金中调制结构的形成
DOI：
10.1007/bf02642930
复制
发表时间：
1974
期刊：
影响因子：
--
通讯作者：
D. H. Polonis
中科院分区：
文献类型：
--
作者：
H. Moreen;R. Taggart;D. H. Polonis
采用透射电镜、x射线分析、电阻率和力学性能测试等方法研究了Ni-V二元合金中有序Ni3V相的析出过程。该反应包括两个阶段，第一阶段涉及到域波成分调制的形成，表现为tweed微观结构和伴随的应变场。第二阶段是长程有序波的放大，表现为有序Ni3V相的形成。畴波产生的应变场与Ni3V核的应变场相互作用，导致在基体的给定区域形成单一的四边形Ni3V变体。连续有序合金的强度由晶格中的应变控制，符合Mott和Nabarro强化理论。
The precipitation of the ordered Ni3V phase in binary Ni-V alloys has been studied by employing transmission electron microscopy, X-ray analysis, electrical resistivity and mechanical property measurements. The reaction consists of two stages, the first of which involves the formation of domain wave composition modulations manifested by a tweed microstructure and an accompanying strain field. The second stage is an amplification of the long-range order waves and is manifested by the formation of the ordered Ni3V phase. The strain fields produced by the domain waves interact with the strain field of the Ni3V nuclei leading to the formation of a single variant of tetragonal Ni3V in a given region of the matrix. The strength of the continuously ordered alloys is controlled by the strain in the lattice in agreement with the Mott and Nabarro theory of strengthening.