This work addresses the effect of deformation twinning on the dissolution corrosion behaviour of 316 L austenitic stainless steels in contact with static liquid lead-bismuth eutectic (LBE). For this purpose, plastically deformed 316 L steel specimens with distinctly different deformation twin densities were simultaneously exposed to oxygen-poor (<10⁻¹³ mass%) static liquid LBE for 1000 h at 500 °C. The variation in deformation twin density was achieved by loading in uniaxial tension to similar degrees of plastic deformation (8–10%) specimens made of the same 316 L steel heat. Tensile loading was carried out at −150, 25 and 150 °C so as to affect the twin density, which increased as the temperature of plastic deformation decreased. Dissolution corrosion was the only liquid metal corrosion mechanism observed in the LBE-exposed steel specimens. The thickness of the dissolution-affected zone increased with the deformation twin density, which was highest in the 316 L steel specimen deformed at −150 °C and lowest in the one deformed at 150 °C. As deformation twin boundaries accelerated the LBE ingress into the steel bulk, their local orientation with respect to the steel specimen surface affected the thickness of the dissolution-affected zone.

这项工作解决了变形孪晶对316 L奥氏体不锈钢与静态液态铅-铋共晶（LBE）接触的溶解腐蚀行为的影响。为此，将具有明显不同的变形双密度的塑性变形316 L钢试样同时暴露于贫氧（<10 ^-13质量％）静态液体LBE在500°C下放置1000 h。变形双胞胎密度的变化是通过在相同的316 L钢热条件下，将单轴拉力加载到相似程度的塑性变形（8-10％）试样上而实现的。拉伸加载在-150、25和150°C下进行，以影响孪生密度，随着塑性变形温度的降低，孪生密度增加。在暴露于LBE的钢样品中，溶解腐蚀是唯一观察到的液态金属腐蚀机理。溶解影响区的厚度随变形双密度增加，在-150°C变形的316 L钢试样中最高，而在150°C变形的试样中最低。随着变形的双重边界加速了LBE进入钢块，