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<p>Grain boundary engineering (GBE) involves improving resistance to grain boundary failure in a material by increasing the proportion of low ∑ coincidence site lattice (CSL) grain boundaries in grain boundary character distributions (GBCDs). In this work, GBCDs in annealed austenitic stainless steel samples with and without Sn were analyzed by electron backscatter diffraction (EBSD). The results showed that the addition of elemental Sn improved the intergranular corrosion resistance of austenitic stainless steel 316L. Compared with austenitic stainless steel without Sn, the proportion of Σ3<sup><i>n</i></sup> special grain boundaries (SBs) in samples containing Sn was higher, the size of the large-sized grain clusters was larger, and the original high-angle grain boundaries (HAGBs) were more discontinuous. Therefore, the addition of elemental Sn promoted the recrystallization process during twin-induced GBE.</p>

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Effect of Sn on Grain Boundary Character Distribution in Austenitic Stainless Steel 316L

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Tong He,
  • Yang Bai,
  • Fei Yan Ma,
  • Yu Meng Song,
  • Hao Feng

摘要

Grain boundary engineering (GBE) involves improving resistance to grain boundary failure in a material by increasing the proportion of low ∑ coincidence site lattice (CSL) grain boundaries in grain boundary character distributions (GBCDs). In this work, GBCDs in annealed austenitic stainless steel samples with and without Sn were analyzed by electron backscatter diffraction (EBSD). The results showed that the addition of elemental Sn improved the intergranular corrosion resistance of austenitic stainless steel 316L. Compared with austenitic stainless steel without Sn, the proportion of Σ3n special grain boundaries (SBs) in samples containing Sn was higher, the size of the large-sized grain clusters was larger, and the original high-angle grain boundaries (HAGBs) were more discontinuous. Therefore, the addition of elemental Sn promoted the recrystallization process during twin-induced GBE.