Zihao Wang , Houzhi Liu , Yutaka Watanabe , Tetsuo Shoji , Xiangyu Zhong , Zhengcao Li , Sergio Lozano-Perez
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引用次数: 0
Abstract
In this article, we introduce a novel in-situ hydrogen charging method for stress corrosion cracking (SCC) testing in a high-temperature and high-pressure water environment at 325 °C for the first time. This method effectively mitigates the interference of the electrochemical charging on the corrosion potential, and the limitation of maintaining a stable hydrogen concentration in the materials using any pre-charge methods. This approach ensures a sufficient and stable amount of diffusible hydrogen (DiffH) within the alloy matrix, which effectively maximizes the effect of diffusible hydrogen in the matrix influencing SCC at high temperatures. Post-experimental characterization reveals that DiffH has a significant impact on the oxidation behaviour near the crack tip. Notably, diffusion induced grain boundary migration (DIGM) is greatly reduced while the preferential intergranular oxidation is still present, suggesting a complex role of DiffH on SCC.
期刊介绍:
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.