Abstract The effect of hydrogen on the twinning evolution in a twinning-induced plasticity (TWIP) austenitic steel was investigated at different strain levels. The presence of hydrogen decreased the twin thickness and increased the twin density in individual twin bundles, in comparison with the hydrogen-free condition. This mechanism, reported for the first time, was termed hydrogen-enhanced densified twinning (HEDT). Based on these experimental observations, the effect of hydrogen on twinning was analyzed from the three stages of nucleation, growth and stability. HEDT may elevate the local stress, and thus significantly affect the hydrogen embrittlement (HE) of TWIP steels.

中文翻译：

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孪生诱导塑性 (TWIP) 钢中的氢增强致密孪生 (HEDT)

摘要 在不同应变水平下研究了氢对孪晶诱导塑性 (TWIP) 奥氏体钢中孪晶演化的影响。与无氢条件相比，氢的存在降低了孪晶厚度并增加了单个孪晶束中的孪晶密度。这种机制是首次报道，被称为氢增强致密孪晶（HEDT）。基于这些实验观察，从成核、生长和稳定三个阶段分析了氢对孪晶的影响。HEDT 可能会提高局部应力，从而显着影响 TWIP 钢的氢脆 (HE)。