Scholarlink

<p>The effect of cyclic tensile deformation in the loading/unloading mode in the superelastic loop region on the deformation structure of a&#xa0;nanocrystalline aging superelastic Ti-50.9 at.% Ni alloy is studied. It is shown that the initial stage (from 0&#xa0;to 5–10&#xa0;cycles) corresponds to the accumulation of dislocations with the formation of a&#xa0;three-dimensional network with the nodes pinned by Ti<sub>3</sub>Ni<sub>4</sub> particles, which inhibits the dislocation activity. After 10&#xa0;loading cycles, there develop additional accommodative deformation mechanisms in the strengthened dislocation structure. It is found out that the relaxation of high internal stresses results in the formation of the reorientation mesobands, which ensure effective stress relaxation due to a&#xa0;local lattice reorientation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

TEM study of deformation bands created by mechanical cycling of a superelastic Ti-50.9 at.% Ni alloy

  • 期刊论文

  • 发表日期：

    2025年11月1日

查看全文
  • S. L. Girsova,
  • T. M. Poletika,
  • S. M. Bitter

摘要

The effect of cyclic tensile deformation in the loading/unloading mode in the superelastic loop region on the deformation structure of a nanocrystalline aging superelastic Ti-50.9 at.% Ni alloy is studied. It is shown that the initial stage (from 0 to 5–10 cycles) corresponds to the accumulation of dislocations with the formation of a three-dimensional network with the nodes pinned by Ti3Ni4 particles, which inhibits the dislocation activity. After 10 loading cycles, there develop additional accommodative deformation mechanisms in the strengthened dislocation structure. It is found out that the relaxation of high internal stresses results in the formation of the reorientation mesobands, which ensure effective stress relaxation due to a local lattice reorientation.