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Plastic deformation sequence and strain gradient characteristics of hydrogen-induced delayed crack propagation in single-crystalline Fe–Si alloy
Scripta Materialia ( IF 6 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.scriptamat.2019.11.012 Thanh Thuong Huynh , Motomichi Koyama , Yoshimasa Takahashi , Shigeru Hamada , Kaneaki Tsuzaki , Hiroshi Noguchi
Scripta Materialia ( IF 6 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.scriptamat.2019.11.012 Thanh Thuong Huynh , Motomichi Koyama , Yoshimasa Takahashi , Shigeru Hamada , Kaneaki Tsuzaki , Hiroshi Noguchi
Abstract Microscopic features of hydrogen-induced delayed crack propagation in a thin sheet of single-crystalline Fe-3wt%Si alloy were investigated. The crack tip plastic deformation associated with the effect of hydrogen during the crack propagation leaves three adjacent regions where different plastic strain gradients and dislocation densities are observed. These regions revealed the effects of plastic deformation and hydrogen-dislocations interaction around the crack tip on the rate-limiting process of hydrogen-induced delayed crack propagation in thin specimens.
中文翻译:
单晶Fe-Si合金氢致裂纹延迟扩展的塑性变形序列和应变梯度特性
摘要 研究了单晶Fe-3wt%Si合金薄片中氢致裂纹延迟扩展的微观特征。裂纹扩展过程中与氢效应相关的裂纹尖端塑性变形留下三个相邻区域,在这些区域观察到不同的塑性应变梯度和位错密度。这些区域揭示了裂纹尖端周围的塑性变形和氢位错相互作用对薄试样中氢诱导延迟裂纹扩展的限速过程的影响。
更新日期:2020-03-01
中文翻译:
单晶Fe-Si合金氢致裂纹延迟扩展的塑性变形序列和应变梯度特性
摘要 研究了单晶Fe-3wt%Si合金薄片中氢致裂纹延迟扩展的微观特征。裂纹扩展过程中与氢效应相关的裂纹尖端塑性变形留下三个相邻区域,在这些区域观察到不同的塑性应变梯度和位错密度。这些区域揭示了裂纹尖端周围的塑性变形和氢位错相互作用对薄试样中氢诱导延迟裂纹扩展的限速过程的影响。