Grain boundary engineering for improving stress corrosion cracking of 304 stainless steel

Tingguang Liu, Qin Bai, Xiangkun Ru, Shuang Xia, Xiangyu Zhong, Yonghao Lu, Tetsuo Shoji

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Grain boundary engineering (GBE) via low strain tension and annealing was used to enhance the resistance to stress corrosion cracking of a 304 stainless steel. Electron backscattered diffraction (EBSD) analysis exhibited that the GBE steel had a higher fraction of low-∑ coincidence site lattice (CSL) boundaries, larger grain-clusters, longer twin boundary chains, and fewer paths of connected non-twin boundaries with a more zigzag shape. Slow strain rate tests in high-temperature water showed that the GBE steel performed better plasticity, higher tensile strength, and similar yield strength compared to conventional steel. The low fraction of random boundaries in GBE steel resulted in a lower frequency of intergranular crack initiation, and the zigzag paths of non-twin boundaries made the intergranular crack propagation more difficult.

本文言語English
ページ(範囲)477-487
ページ数11
ジャーナルMaterials Science and Technology (United Kingdom)
35
4
DOI
出版ステータスPublished - 2019 3月 4

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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