Insight into the acceleration in oxidation kinetics ahead of stress corrosion crack of alloy 690 in simulated PWR primary water

Kuang Wenjun; Song Miao; Feng Xingyu

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Insight into the acceleration in oxidation kinetics ahead of stress corrosion crack of alloy 690 in simulated PWR primary water

机译：在模拟PWWR初级水中洞察合金690的应力腐蚀裂纹之前的氧化动力学的加速度

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摘要

The acceleration in oxidation kinetics beyond a stress corrosion crack of alloy 690 in simulated PWR primary water was clarified by comparing the oxide depths at two identical carbide/matrix interfaces along a single grain boundary. Compact chromia layer formed along these two interfaces at vastly different rates. Stress concentration ahead of the crack tip only slightly increased the oxidation rate as the crack is still very shallow. Deformation localization near the crack plays a dominant role in accelerating oxidation kinetics as the associated high vacancy concentration can promote the diffusivity of oxygen by over an order of magnitude.

机译：通过将沿着单晶边界的两个相同的碳化物/基质界面比较氧化物深度，澄清了氧化动力学的加速度超出了模拟PR初级水的应力腐蚀裂纹。紧凑型铬层沿着这两个界面形成，以极大的速率。由于裂缝仍然非常浅，因此裂缝尖端的应力集中仅略微增加氧化率。随着相关的高空位浓度可以通过超过一个数量级促进氧的扩散性，在加速氧化动力学附近的变形定位在加速氧化动力学中起着显着作用。

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来源
《Corrosion science》 |2020年第11期|108943.1-108943.10|共10页
作者
Kuang Wenjun; Song Miao; Feng Xingyu;
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作者单位

Xi An Jiao Tong Univ Ctr Adv Mat Performance Nanoscale CAMP Nano State Key Lab Mech Behav Mat Xian 710049 Peoples R China;

Univ Michigan Dept Nucl Engn & Radiol Sci Ann Arbor MI 48109 USA;

Xi An Jiao Tong Univ Ctr Adv Mat Performance Nanoscale CAMP Nano State Key Lab Mech Behav Mat Xian 710049 Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Alloy; STEM; Oxidation; Interfaces; Kinetic parameters; Stress corrosion;

机译：合金;茎;氧化;界面;动力学参数;压力腐蚀;

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1. Characterization of internal and intergranular oxidation in Alloy 690 exposed to simulated PWR primary water and its implications with regard to stress corrosion cracking [J] . Lim Yun Soo, Kim Dong Jin, Kim Sung Woo, Materials Characterization . 2019,第期

机译：对模拟PWWR初级水的合金690中内晶体氧化的表征及其关于应力腐蚀裂纹的影响
2. The effect of cold rolling on grain boundary structure and stress corrosion cracking susceptibility of twins in alloy 690 in simulated PWR primary water environment [J] . Kuang Wenjun, Was Gary S., Miller Cody, Corrosion science . 2018,第jana期

机译：冷轧对模拟压水堆原水环境中690合金孪晶的晶界结构和应力腐蚀开裂敏感性的影响
3. Crack growth and cracking behavior of Alloy 600/182 and Alloy 690/152 welds in simulated PWR primary water [J] . Yun Soo Lim, Dong Jin Kim, Sung Woo Kim, Nuclear engineering and technology . 2019,第1期

机译：合金600/182和690/152合金焊缝在模拟PWR初级水中的裂纹扩展和开裂行为
4. Stress Corrosion Cracking Growth Rate of Cold Rolled Thermally Treated Alloy 690 and Solution Annealed Alloy 690 and their Mechanisms in Simulated PWR Primary Water [C] . Toshio YONEZAWA, Atsushi HASHIMOTO European Corrosion Congress . 2019

机译：冷轧热处理合金690和溶液退火合金690的应力腐蚀裂解速率及其在模拟PWW初级水中的机制
5. Indications of Stress Corrosion Cracking Resistance in Alloy 82 Dissimilar Metal Welds in Simulated Primary Water Environments [D] . Persaud, Suraj 2011

机译：模拟的一次水环境中82合金异种金属焊缝的耐应力腐蚀开裂迹象
6. Stress Corrosion Behaviors of 316LN Stainless Steel in a Simulated PWR Primary Water Environment [O] . Yong Huang, Weisong Wu, Shuo Cong, 2018

机译：316LN不锈钢在模拟压水堆原水环境中的应力腐蚀行为
7. Corrosion Control of Alloy 690 by Shot Peening and Electropolishing under Simulated Primary Water Condition of PWRs [O] . Kyung Mo Kim, Hee-Sang Shim, Myung Ji Seo, 2015

机译：PWWRS模拟初级水条件下喷丸和电抛光对合金690的腐蚀控制

Insight into the acceleration in oxidation kinetics ahead of stress corrosion crack of alloy 690 in simulated PWR primary water

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