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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Dependence of crack growth kinetics on dendrite orientation and water chemistry for Alloy 182 weld metal in high-temperature water
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Dependence of crack growth kinetics on dendrite orientation and water chemistry for Alloy 182 weld metal in high-temperature water

机译：高温水中182合金焊接金属的裂纹扩展动力学对枝晶取向和水化学的依赖性

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摘要

Stress corrosion cracking growth rates of Alloy 182 weld metals in T-S and T-L orientations in 288 degrees C pure water with various dissolved oxygen and hydrogen concentrations were measured. Extensive inter-dendritic stress corrosion cracking paths on the side surfaces and fracture surfaces were observed. The crack growth path in the T-S orientation specimen was perpendicular to the applied loading direction, and parallel to the loading direction in the T-L specimen. Crack growth rates of the T-S specimen were significantly higher than those of the T-L specimen under the same test conditions. The crack growth rate decreased significantly with decreasing dissolved oxygen concentration. Adding dissolved hydrogen in water caused an apparent decrease of the alternating current potential drop signal during crack growth monitoring. (C) 2014 Elsevier B.V. All rights reserved.
机译：在288摄氏度的纯水中，以不同的溶解氧和氢浓度测量了182合金焊接金属在T-S和T-L方向上的应力腐蚀裂纹扩展速率。观察到在侧面和断裂面上广泛的树突间应力腐蚀开裂路径。 T-S取向试样中的裂纹扩展路径垂直于施加的载荷方向，并且平行于T-L试样中的载荷方向。在相同的测试条件下，T-S试样的裂纹扩展速率明显高于T-L试样的裂纹扩展速率。裂纹扩展速率随着溶解氧浓度的降低而显着降低。在裂纹扩展监测期间，将溶解的氢添加到水中会导致交流电势下降信号明显降低。 （C）2014 Elsevier B.V.保留所有权利。

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