Hydrogen-induced intergranular cracking of pure nickel under various strain rates and temperatures in gaseous hydrogen environment
Hydrogen-induced intergranular cracking of pure nickel under various strain rates and temperatures in gaseous hydrogen environment
复制标题
气态氢环境下不同应变率和温度下纯镍氢致晶间开裂
DOI：
10.1016/j.msea.2023.145040
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Yamabe J.
中科院分区：
文献类型：
--
作者：
Wada K.;Shibata C.;Enoki H.;Iijima T.;Yamabe J.
工业级纯镍，NI-201，在高压氢气中在不同的测试温度和应变速率下进行拉伸测试。试验温度和应变速率对氢脆程度有显著影响，提高应变速率和降低试验温度可抑制氢脆。虽然通过局部平衡捕获在GB的氢占主导地位的HE程度在充氢的情况下，在测试过程中的GB的氢气供应需要在气态氢的情况下。虽然氢-位错相互作用是氢供应的候选者之一，但在气态氢的情况下，几乎不存在可以与位错相互作用的晶格氢，并且没有观察到诸如流动应力增加和锯齿屈服的相关行为;因此，推测氢-位错相互作用的贡献很小。另外，我们提出了一个HE模型，考虑氢扩散沿着晶界（GB）从裂纹尖端，成功地证明了实验结果。
Industrial-grade pure nickel, NI-201, was tensile tested in high-pressure hydrogen gas at various testing temperatures and strain rates. The degree of hydrogen embrittlement (HE) was strongly affected by the testing temperature and strain rate, and elevating the strain rate and lowering the temperature result in suppressed HE. While hydrogen trapped at GBs via local equilibrium dominated the HE degree in hydrogen-charged cases, hydrogen supply to GBs during the tests was required in gaseous hydrogen cases. Although hydrogen–dislocation interaction was one of candidates for the hydrogen supply, the lattice hydrogen, which can interact with dislocations, hardly existed and related behaviors such as increase in flow stress and serrated yielding were not observed in the gaseous hydrogen cases; therefore, the contribution of the hydrogen–dislocation interaction was speculated to be minor. Alternatively, we proposed an HE model considering hydrogen diffusion along grain boundaries (GBs) from the crack tip, which successfully demonstrated the experimental results.
登录
查看更多内容
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
DOI：
10.21236/ad0038142
发表时间：
1954
期刊：
--
影响因子：
--
作者：
R. P. Frohmberg;W. J. Barnett;A. R. Troiano
通讯作者：
A. R. Troiano
测量对称倾斜镍晶界中的模拟氢扩散并检查鲍里索夫关系与各个边界扩散的相关性
影响因子：
9.4
作者：
D. E. Page;Katherine Varela;Oliver K. Johnson;D. Fullwood;E. Homer
通讯作者：
E. Homer
沿晶界捕获的氢的可视化及其对纯镍中氢致晶间断裂的定量贡献
DOI：
10.1016/j.mtla.2019.100478
发表时间：
2019
期刊：
影响因子：
--
作者：
K. Wada;J. Yamabe;H. Matsunaga
通讯作者：
H. Matsunaga