Abstract A new thermomechanical processing of warm rolling by a low deformation followed by annealing, which was specially developed for grain boundary (GB) engineering of large-size materials, was performed on a large-size 316 stainless steel. To examine usefulness of the thermomechanical process, the GB-networks before and after this process were quantitatively compared, and intergranular attack susceptibility was measured. Results clearly demonstrate that the GB-engineered 316 has higher proportions of coincidence site lattice boundaries, larger grain-clusters, longer twin boundary chains, and lower susceptibility to intergranular attack, indicating a successful process for GB-engineering. Additionally, a new parameter called twin boundary chain was proposed to evaluate the GB-network optimization.

中文翻译：

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大尺寸316不锈钢温轧晶界工程提高抗晶间侵蚀能力

摘要 对大尺寸316不锈钢进行了一种专为大尺寸材料晶界工程开发的低变形后退火温轧热机械加工新工艺。为了检查热机械过程的有效性，对这个过程前后的 GB 网络进行了定量比较，并测量了晶间侵蚀敏感性。结果清楚地表明，GB 工程 316 具有更高比例的重合位点晶格边界、更大的晶簇、更长的孪晶边界链和更低的晶间攻击敏感性，表明 GB 工程的成功过程。此外，提出了一个称为双边界链的新参数来评估 GB 网络优化。