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首页> 外文期刊>Materials and Corrosion >Behavior and susceptibility to stress corrosion cracking of a nickel-based alloy in superheated steam and supercritical water
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Behavior and susceptibility to stress corrosion cracking of a nickel-based alloy in superheated steam and supercritical water

机译：过热蒸汽和超临界水中镍基合金应力腐蚀破裂的行为及易感性

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Stress corrosion cracking (SCC) behavior of Alloy 617 was studied to evaluate its suitability for Generation IV supercritical water reactor concept. A series of slow strain rate tensile (SSRT) tests at a constant strain rate of 5 x 10(-7) s(-1) were carried out in superheated steam and supercritical water over a pressure range of 0.1-25 MPa at 650 degrees C. SSRT test in dry N-2 gas was also performed to compare the results in non-corrosive environment with corrosive medium environment. Intergranular cracks were observed for all specimens regardless of the test environment. Alloy 617 showed susceptibility to SCC at the tested experimental conditions. The dominance of intergranular SCC was observed on the gage surface and fracture surface by using scanning electron microscope analysis. The effect of varying environmental conditions on SCC susceptibility is further discussed.
机译：研究了合金617的应力腐蚀裂纹（SCC）行为，评价IV发电超临界水反应堆概念的适用性。 以5×10（-7）S（-1）的恒定应变速率的一系列慢应变速率拉伸（SSRT）试验在0.1-25MPa的压力范围内在650度的过热蒸汽和超临界水中进行 C.还进行了干燥的N-2气体中的SSRT测试，以比较具有腐蚀性介质环境的非腐蚀性环境的结果。 无论测试环境如何，都观察到所有标本的晶间裂缝。 合金617显示对经过测试的实验条件的SCC易感性。 通过使用扫描电子显微镜分析，在量谱表面和断裂表面上观察到晶间SCC的优势。 进一步讨论了不同环境条件对SCC易感性的影响。

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