Kinetics Analysis of Thermally Activated Elementary Processes in Stress Corrosion Cracking Crack Growth

应力腐蚀开裂裂纹扩展热激活基本过程的动力学分析

• 批准号: 18560066
• 负责人: LU Zhanpeng
• 金额: $ 2.33万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560066/
• 关键词: Material Strength; Stress Corrosion Cracking; Light Water Reactor Materals; Crack Growth Rate; Thermal activation energy

In order to clarify the thermal activated element processes involved in stress corrosion cracking of structural materials in light water reactor environments, steady state crack growth rates were measured and the apparent activation energies were evaluated. The observed apparent activation energies are analyzed based on multiple rate-determining processes involved in stress corrosion crack growth. Several types o f temperature-dependence for crack growth rates of austenitic alloys and their weld metals are classified. Different ways of defining and measuring apparent activation energy are discussed. For the crack growth of Ni-based alloys and their weld metals in simulated pressurized water reactor environments, the apparent activation energy is relatively high and close to those for normal oxidation processes. The crack growth rates of sensitized 304 stainless steels in oxygenated high temperature pure water environments increased monotonically with temperature. On the other hand, a p … More eak in crack growth rate versus temperature was observed in high temperature water containing chemical additions or impurities. The apparent activation energy depends on testing conditions. The stress corrosion cracking growth rates for strain-hardened low-carbon stainless steels in pure water increase monotonically with temperature in the range 200-288°C, which show that crack growth is mainly controlled by thermally-activated processes. The apparent activation energies are different in different temperature ranges, and could be related to the effects of temperature on multiple-element processes that are involved in the crack-tip oxidation kinetics. Time-lag crack growth periods after increasing or decreasing the temperature were observed in all the tested specimens. The effects of temperature, applied loading and material strength on apparent activation energy are analyzed by taking into consideration the effects of temperature on the multiple element processes involved in the crack tip oxidation kinetics. Less

为了阐明轻水反应堆环境中结构材料应力腐蚀开裂所涉及的热活化元素过程，测量了稳态裂纹扩展速率，并评估了表观活化能。所观察到的表观活化能进行了分析的基础上参与应力腐蚀裂纹扩展的多个速率决定过程。对奥氏体合金及其焊缝金属裂纹扩展速率的温度依赖性进行了分类。讨论了表观活化能的不同定义和测量方法。镍基合金及其焊缝金属在模拟压水堆环境中裂纹扩展的表观活化能较高，接近于正常氧化过程的表观活化能。敏化304不锈钢在加氧高温纯水环境中的裂纹扩展速率随温度单调增加。另一方面，P ...更多信息 在含有化学添加物或杂质的高温水中观察到裂纹生长速率对温度的突变。表观活化能取决于测试条件。应变硬化低碳不锈钢在纯水中的应力腐蚀裂纹扩展速率在200-288°C范围内随温度单调增加，表明裂纹扩展主要受热激活过程控制。表观活化能在不同的温度范围内是不同的，可能与温度对裂纹尖端氧化动力学中涉及的多元素过程的影响有关。在所有的测试样品中观察到的时滞裂纹扩展期后，增加或降低温度。通过考虑温度对裂纹尖端氧化动力学中涉及的多元素过程的影响，分析了温度、外加载荷和材料强度对表观活化能的影响。少

项目成果

Effects of loading mode and temperature on stress corrosion cracking growth rates of acold-worked type 316L stainless steel iin oxygenated pure water

加载方式和温度对冷加工316L不锈钢在含氧纯水中应力腐蚀裂纹扩展速率的影响

• 发表时间: 2007
• 期刊: Corrosion 63(11)
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu
• 通讯作者: Z. Lu

Effects of loading mode and temperature on stress corrosion cracking growth rates of acold-worked type 316L stainless steel in oxygenated pure water

加载方式和温度对冷加工316L不锈钢在含氧纯水中应力腐蚀裂纹扩展速率的影响

• 发表时间: 2007
• 期刊: Corrosion 63(11)
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu;Takashi Nagatani;Takashi Nagatani;Z. Lu
• 通讯作者: Z. Lu

Effects of Loading mode and Temperature on Stress Corrosion Cracking Growth Behavior of Strain hardened 316L Stainless Steels in Oxygenated Pure Water.

加载方式和温度对应变硬化316L不锈钢在含氧纯水中应力腐蚀裂纹扩展行为的影响。

• 发表时间: 2007
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu;Takashi Nagatani;Takashi Nagatani;Z. Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu

Effects of Loading mode and Temperature on Stress Corrosion Cracking Growth Behavior of Strain-hardened 316L Stainless Steels in Oxygenated Pure Water

加载方式和温度对应变硬化316L不锈钢在含氧纯水中应力腐蚀裂纹扩展行为的影响

• 发表时间: 2007
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu;Takashi Nagatani;Takashi Nagatani;Z. Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu

Some Fundamental Aspects of Thermally Activated Processes Involved in Stress Corrosion Cracking in High Temperature Aqueous Environments

高温水环境中应力腐蚀开裂涉及的热激活过程的一些基本方面

• 期刊: Journal of Nuclear Materials Accepted for publication
• 作者: 保浦知也;安藤佳洋;田川正人;長野靖尚;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu