Scholarlink

<p>This work is devoted to identify the specificity of plastic deformation, grain segmentation, plasticized fine-grained metal flow and texturing in a stirring zone formed between single crystalline and polycrystalline copper samples in friction stir welding (FSW). Inverse polar figures (IPFs) and orientation distribution functions (ODFs) were reconstructed from EBSD data obtained from different regions across the weld section. Thermomechanically affected zone (TMAZ) on the retreating side (RS) was formed by plastic deformation of single crystalline sample resulting in coarse–grained structures The stir zone (SZ) was mainly composed of small 1 to 3&#xa0;<i>μ</i>m grains and contained also coarse-grained up to ~ 10&#xa0;<i>μ</i>m in size grain eddy-like structures. TMAZ on the advancing side (AS) had a typical fine-grained structure formed by flow of the SZ metal over the initial rolled copper structures. Preferential orientation of grains in these bands varied depending on their location in the stir zone. The fine-grained flow of metal and small differences in the grain orientation were found in bands close to both advancing and retreating sides of the stir zone. The central part of the stir zone showed the bands that resulted from both single- and polycrystalline copper samples, which had significantly different grain sizes and crystallographic orientations. The most complex pattern of the metal flow was found in the upper part of the stir zone, which underwent a combined deformation effect from the pin and the tool shoulder.</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

Structural Evolution of a Stir Zone Formed by Friction Stir Welding Between Single- and Polycrystalline Copper

  • 期刊论文

  • 发表日期：

    2025年3月7日

查看全文
  • Andrey Chumaevskii,
  • Sergei Tarasov,
  • Dmitry Lychagin,
  • Evgeny Moskvichev,
  • Denis Gurianov,
  • Valery Rubtsov,
  • Evgeny Kolubaev

摘要

This work is devoted to identify the specificity of plastic deformation, grain segmentation, plasticized fine-grained metal flow and texturing in a stirring zone formed between single crystalline and polycrystalline copper samples in friction stir welding (FSW). Inverse polar figures (IPFs) and orientation distribution functions (ODFs) were reconstructed from EBSD data obtained from different regions across the weld section. Thermomechanically affected zone (TMAZ) on the retreating side (RS) was formed by plastic deformation of single crystalline sample resulting in coarse–grained structures The stir zone (SZ) was mainly composed of small 1 to 3 μm grains and contained also coarse-grained up to ~ 10 μm in size grain eddy-like structures. TMAZ on the advancing side (AS) had a typical fine-grained structure formed by flow of the SZ metal over the initial rolled copper structures. Preferential orientation of grains in these bands varied depending on their location in the stir zone. The fine-grained flow of metal and small differences in the grain orientation were found in bands close to both advancing and retreating sides of the stir zone. The central part of the stir zone showed the bands that resulted from both single- and polycrystalline copper samples, which had significantly different grain sizes and crystallographic orientations. The most complex pattern of the metal flow was found in the upper part of the stir zone, which underwent a combined deformation effect from the pin and the tool shoulder.