Ductility Loss in Ductile Cast Iron with Internal Hydrogen
Ductility Loss in Ductile Cast Iron with Internal Hydrogen
复制标题
球墨铸铁内含氢的延展性损失
DOI：
10.1007/s11661-013-2109-9
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Endo
中科院分区：
文献类型：
--
作者：
H. Matsunaga;Teruki Usuda;K. Yanase;M. Endo
通过使用三种不同十字头速度进行一系列拉伸试验，研究了球墨铸铁 (DCI) 中氢引起的延展性损失。利用热脱附光谱和氢显微技术发现，大部分溶质氢呈扩散状态，主要偏析在石墨、石墨/基体界面区以及基体中珠光体渗碳体处。未充电样品的断裂过程主要是延性韧窝断裂，而充氢样品的断裂过程由于相邻石墨球之间伴随的互连裂纹而变得不太延展。在充氢试样内部，在断裂过程的早期阶段，石墨与基体之间的界面脱粘产生的间隙充满了氢气。在随后的断裂过程中，这种局部氢气气氛加上应力引起的扩散将氢吸引到裂纹尖端，从而导致与时间相关的延展性损失。
Hydrogen-induced ductility loss in ductile cast iron (DCI) was studied by conducting a series of tensile tests with three different crosshead speeds. By utilizing the thermal desorption spectroscopy and the hydrogen microprint technique, it was found that most of the solute hydrogen was diffusive and mainly segregated at the graphite, graphite/matrix interface zone, and the cementite of pearlite in the matrix. The fracture process of the non-charged specimen was dominated by the ductile dimple fracture, whereas that of the hydrogen-charged specimen became less ductile because of the accompanying interconnecting cracks between the adjacent graphite nodules. Inside the hydrogen-charged specimen, the interspaces generated by the interfacial debonding between graphite and matrix are filled with hydrogen gas in the early stage of the fracture process. In the subsequent fracture process, such a local hydrogen gas atmosphere coupled with a stress-induced diffusion attracts hydrogen to the crack tip, which results in a time-dependent ductility loss.
氢对900 MPa级低合金钢SCM435拉伸性能的影响
DOI：
--
发表时间：
2006
期刊：
日本金属学会誌 70-12
影响因子：
--
作者：
松岡三郎;本間紳浩;田中裕之;福島良博;村上敬宜
通讯作者：
村上敬宜
具有局部特征向量的大型内部全纯扩展图
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
Kagawa Kotaro;Takimoto Gaku;Seehausen Ole;Sefan Asamitsu;Miyu Suzuki;佐竹 翔平
通讯作者：
佐竹 翔平
通过二次离子质谱法可视化铁素体、珠光体和石墨的氢解吸过程
DOI：
--
发表时间：
2002
期刊：
Metallurgical and Materials Transactions A Vol.33A
影响因子：
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作者：
K.Takai;Y.Chiba;K.Noguchi;A.Nozue
通讯作者：
A.Nozue