Tailoring the grain boundary network is desired to improve grain boundary-dependent phenomena such as intergranular corrosion. An important grain boundary network descriptor in heavily twinned microstructures is the twin-related domain, a cluster of twin-related grains. We indicate the advantages of using twin-related domains and subsequent statistics to provide new insight into how a grain boundary networks respond to intergranular corrosion in a heavily twinned grain boundary engineered 316L stainless steel. The results highlight that intergranular corrosion is typically arrested inside twin-related domains at coherent twins or low-angle grain boundaries. Isolated scenarios exist, however, where intergranular corrosion propagation persists in the grain boundary network through higher-order twin-related boundaries.

期望调整晶界网络以改善与晶界有关的现象，例如晶间腐蚀。在双晶组织中，重要的晶界网络描述符是孪生相关域，即孪生相关晶粒的簇。我们指出了使用孪生相关域和后续统计数据的优势，以提供有关晶界网络如何对重晶胞工程化316L不锈钢中的晶界腐蚀作出反应的新见解。结果表明，晶间腐蚀通常在相干孪晶或低角度晶界处的孪晶相关区域内被阻止。但是，存在孤立的情况，其中晶界腐蚀传播通过更高阶的孪晶相关边界持续存在于晶界网络中。