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学者姓名：张朱武
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Abstract ：
通过面外局部压缩法在CT试样中引入残余应力后进行了准静态断裂拉伸测试，以研究残余应力对试样断裂行为的影响机理；同时利用有限元方法建立了LOPC法引入的残余应力对不同裂纹深度试样断裂行为影响的评估模型，通过CT试样准静态断裂拉伸试验验证了模型的准确性。从数值模拟与试验结果中可以看出，残余拉应力降低了断裂时的载荷与位移，残余压应力的作用效果相反；随着初始裂纹深度的增加，残余应力对断裂载荷的作用效果并未产生明显变化，而对断裂位移的作用效果明显增强；两种类型的残余应力均增大了启裂J积分，但残余压应力对应的J积分大于残余拉应力对应的J积分；随着裂纹深度的增加，J积分逐渐增大。
Keyword ：
J积分 J积分 初始裂纹深度 初始裂纹深度 断裂行为 断裂行为 残余应力 残余应力 面外局部压缩(LOPC) 面外局部压缩(LOPC)
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| GB/T 7714 | 李一义 , 王芳 , 黄逸 et al. 残余应力对P91钢断裂行为的影响 [J]. | 压力容器 , 2024 , 41 (02) : 28-36,86 . |
| MLA | 李一义 et al. "残余应力对P91钢断裂行为的影响" . | 压力容器 41 . 02 (2024) : 28-36,86 . |
| APA | 李一义 , 王芳 , 黄逸 , 林星 , 林登科 , 李贺 et al. 残余应力对P91钢断裂行为的影响 . | 压力容器 , 2024 , 41 (02) , 28-36,86 . |
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In this work, the effects of different nutrient contents in simulated soil solution containing sulfate-reducing bacteria (SRB) on the corrosion of X80 pipeline steel were studied. The highest amount of sessile SRB was found in the initial medium concentration of 1/3, followed by the concentration of 10%, and the lowest in the simulated soil solution without culture medium. However, the biofilm formed in the simulated soil solution without culture medium had the strongest adhesion and corrosiveness, with X80 steel having the highest corrosion rate, which was approximately 7.2 times of the initial medium concentration of 1/3. The research results have a positive role in promoting the development of SRB corrosion prevention technology for buried pipeline.
Keyword ：
Microbiologically influenced corrosion Microbiologically influenced corrosion Nutrient salts Nutrient salts Sulfate-reducing bacteria Sulfate-reducing bacteria X80 pipeline steel X80 pipeline steel
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| GB/T 7714 | Zhang, Zhuwu , Liu, Chang , Lin, Zhencheng et al. Effect of nutrient concentration on corrosion mechanism of X80 pipeline steel caused by sulfate-reducing bacteria [J]. | JOURNAL OF ELECTROANALYTICAL CHEMISTRY , 2024 , 956 . |
| MLA | Zhang, Zhuwu et al. "Effect of nutrient concentration on corrosion mechanism of X80 pipeline steel caused by sulfate-reducing bacteria" . | JOURNAL OF ELECTROANALYTICAL CHEMISTRY 956 (2024) . |
| APA | Zhang, Zhuwu , Liu, Chang , Lin, Zhencheng , Guo, Liping , Shuai, Yi , Cheng, Y. Frank . Effect of nutrient concentration on corrosion mechanism of X80 pipeline steel caused by sulfate-reducing bacteria . | JOURNAL OF ELECTROANALYTICAL CHEMISTRY , 2024 , 956 . |
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Abstract ：
针对氢能源管道储运过程中的氢脆问题，设计电化学充氢条件下的X80管线钢临氢行为综合测试试验，实测温度对管线钢氢脆敏感性的影响。结果表明：氢扩散系数和钢内壁氢浓度随着温度的升高而增加；315 K下X80管线钢的断后伸长率及断面收缩率最小，氢脆指数最高；试样断口形貌呈脆性断裂特征。分子动力学模拟结果进一步表明，315 K下裂纹尖端的位错和孪晶释放极少，因此诱发了脆性扩展行为。
Keyword ：
分子动力学模拟 分子动力学模拟 慢应变速率拉伸 慢应变速率拉伸 氢渗透 氢渗透 氢脆敏感性 氢脆敏感性 电化学充氢 电化学充氢
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| GB/T 7714 | 李加庆 , 吴子悦 , 朱礼洁 et al. 不同温度下管线钢氢脆的多尺度综合试验研究 [J]. | 实验室研究与探索 , 2023 , 42 (10) : 10-14 . |
| MLA | 李加庆 et al. "不同温度下管线钢氢脆的多尺度综合试验研究" . | 实验室研究与探索 42 . 10 (2023) : 10-14 . |
| APA | 李加庆 , 吴子悦 , 朱礼洁 , 滕霖 , 尹鹏博 , 张朱武 . 不同温度下管线钢氢脆的多尺度综合试验研究 . | 实验室研究与探索 , 2023 , 42 (10) , 10-14 . |
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The influence of temperature on hydrogen diffusion and hydrogen embrittlement of X80 steel was studied using electrochemical hydrogen charging. The hydrogen diffusion and subsurface hydrogen concentration in the steel increased with increasing the temperature. Macro slow strain rate tensile tests and microstructural analysis were performed to unveil the dependence of hydrogen-induced embrittlement susceptibility on temperature, which suggested a temperature threshold THE, max of 315 K. The demonstration of THE, max would be crucial for determining test temperatures of hydrogen-related engineering material applications.
Keyword ：
Electrochemical hydrogen charging Electrochemical hydrogen charging Embrittlement susceptibility Embrittlement susceptibility Hydrogen embrittlement Hydrogen embrittlement Hydrogen permeation Hydrogen permeation Temperature effect Temperature effect
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| GB/T 7714 | Li, Jiaqing , Wu, Ziyue , Zhu, Lijie et al. Investigations of temperature effects on hydrogen diffusion and hydrogen embrittlement of X80 pipeline steel under electrochemical hydrogen charging environment [J]. | CORROSION SCIENCE , 2023 , 223 . |
| MLA | Li, Jiaqing et al. "Investigations of temperature effects on hydrogen diffusion and hydrogen embrittlement of X80 pipeline steel under electrochemical hydrogen charging environment" . | CORROSION SCIENCE 223 (2023) . |
| APA | Li, Jiaqing , Wu, Ziyue , Zhu, Lijie , Zhang, Zhuwu , Teng, Lin , Zhang, Liang et al. Investigations of temperature effects on hydrogen diffusion and hydrogen embrittlement of X80 pipeline steel under electrochemical hydrogen charging environment . | CORROSION SCIENCE , 2023 , 223 . |
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对脉冲电流止裂后的应变强化奥氏体不锈钢的组织和性能进行研究。结果表明，脉冲电流止裂后，在温度场和应力场共同作用下，应变强化304奥氏体不锈钢止裂处的金相组织形成了凝固区、再结晶区、马氏体区，其中马氏体区内马氏含量随应变量的增加而不断提高，且热影响区范围也进一步扩大，再结晶区也由部分再结晶转变为完全再结晶。应变强化奥氏体不锈钢的硬度随变形量的增加而增大，但由于脉冲止裂后，熔孔周边产生凝固区和再结晶区，使裂纹止裂处材料硬度又有了明显降低；而硬度的降低，在一定程度上表明其塑性的提高，这将有利于抑制裂纹的二次扩展。
Keyword ：
304不锈钢 304不锈钢 应变强化 应变强化 硬度 硬度 裂纹止裂 裂纹止裂
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| GB/T 7714 | 张朱武 , 潘光国 , 蒋艳 et al. 应变强化对304不锈钢脉冲电流止裂的影响 [J]. | 热加工工艺 , 2022 , (08) : 30-34 . |
| MLA | 张朱武 et al. "应变强化对304不锈钢脉冲电流止裂的影响" . | 热加工工艺 08 (2022) : 30-34 . |
| APA | 张朱武 , 潘光国 , 蒋艳 , 许承伟 . 应变强化对304不锈钢脉冲电流止裂的影响 . | 热加工工艺 , 2022 , (08) , 30-34 . |
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Serious crevice corrosion was detected at wear ring and pump casing of an S32760 duplex stainless steel fire pump assembled on an offshore platform, which resulted in broken of the wear ring. The failure mechanism of the cracked wear ring was analyzed, and results showed that the chemical composition of the wear ring corresponds to the standard S32760. However, metallographic test results showed that the wear ring has many harmful sigma-phases and inclusions in the matrix, which led to the decrease of corrosion resistance of the material and induced crevice corrosion at the bolt joint and the wear ring. Besides, Chloride, sulfide, sodium and potassium have been found at corrosion products and pump casing fragments through energy dispersive X-ray spectrometry. Thus, to extend the service life of the fire pump, better sealing measures are needed to prevent crevice corrosion.
Keyword ：
crevice corrosion crevice corrosion fire pump fire pump S32760 S32760 stainless steel stainless steel X-ray spectrometry X-ray spectrometry
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| GB/T 7714 | Wang, Haipeng , Yang, Yang , Yang, Zhongna et al. Corrosion failure analysis of duplex stainless steel in marine environment [J]. | INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE , 2022 , 17 (5) . |
| MLA | Wang, Haipeng et al. "Corrosion failure analysis of duplex stainless steel in marine environment" . | INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 17 . 5 (2022) . |
| APA | Wang, Haipeng , Yang, Yang , Yang, Zhongna , Xu, Zhigang , Chai, Yuanyuan , Zhang, Zhuwu . Corrosion failure analysis of duplex stainless steel in marine environment . | INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE , 2022 , 17 (5) . |
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The corrosion mechanism of X80 steel in simulated solutions of acid red soil and product oil sediment under mechano-electrochemical interaction (MEI) was researched to build a new finite element model through multi-physical field coupling simulation technology. Based on the new model, the effect of external wall defect growth on the internal wall corrosion of oil pipelines was analyzed in detail. The results showed that the distributions of stress and corrosion of the internal wall were extremely affected by the external wall defect depth, and the corrosion rate of the internal wall was enlarged remarkably by the external wall defect growth. Moreover, attributing to the local galvanic cell effect under MEI, the growth rates of corrosion defects in the depth and length directions of the external defect were accelerated because these directions were associated with larger stress and equivalent to the anode, but the corrosion rate in the width direction of the external defect was inhibited because this direction was associated with smaller stress and equivalent to the cathode.
Keyword ：
corrosion corrosion finite element model finite element model mechano-electrochemical interaction mechano-electrochemical interaction pipelines pipelines
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| GB/T 7714 | Zhang, Zhuwu , Zhang, Jiuhong , Ding, Mingchao . Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano-electrochemical interaction [J]. | CANADIAN JOURNAL OF CHEMICAL ENGINEERING , 2022 , 101 (3) : 1398-1409 . |
| MLA | Zhang, Zhuwu et al. "Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano-electrochemical interaction" . | CANADIAN JOURNAL OF CHEMICAL ENGINEERING 101 . 3 (2022) : 1398-1409 . |
| APA | Zhang, Zhuwu , Zhang, Jiuhong , Ding, Mingchao . Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano-electrochemical interaction . | CANADIAN JOURNAL OF CHEMICAL ENGINEERING , 2022 , 101 (3) , 1398-1409 . |
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Abstract ：
The corrosion mechanism of X80 steel in simulated solutions of acid red soil and product oil sediment under mechano‐electrochemical interaction (MEI) was researched to build a new finite element model through multi‐physical field coupling simulation technology. Based on the new model, the effect of external wall defect growth on the internal wall corrosion of oil pipelines was analyzed in detail. The results showed that the distributions of stress and corrosion of the internal wall were extremely affected by the external wall defect depth, and the corrosion rate of the internal wall was enlarged remarkably by the external wall defect growth. Moreover, attributing to the local galvanic cell effect under MEI, the growth rates of corrosion defects in the depth and length directions of the external defect were accelerated because these directions were associated with larger stress and equivalent to the anode, but the corrosion rate in the width direction of the external defect was inhibited because this direction was associated with smaller stress and equivalent to the cathode.
Keyword ：
corrosion corrosion finite element model finite element model mechano-electrochemical interaction mechano-electrochemical interaction pipelines pipelines
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| GB/T 7714 | Zhuwu Zhang , Jiuhong Zhang , Mingchao Ding . Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction [J]. | The Canadian Journal of Chemical Engineering , 2022 , 101 (3) : 1398-1409 . |
| MLA | Zhuwu Zhang et al. "Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction" . | The Canadian Journal of Chemical Engineering 101 . 3 (2022) : 1398-1409 . |
| APA | Zhuwu Zhang , Jiuhong Zhang , Mingchao Ding . Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction . | The Canadian Journal of Chemical Engineering , 2022 , 101 (3) , 1398-1409 . |
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A finite element model was built to assess the combined effects of internal pressure and axial applied stress(sigma(A)) on localized stress concentration and electrochemical corrosion at defects on pipelines under the mechano-electrochemical (M-E) interaction. When defect angle alpha (i.e., included angle between the major axis of the defect and longitudinal direction of the pipe) is 90 degrees, the maximum stress of the defect is enlarged remarkably with the increase in sigma(A), leading to electrochemical corrosion at the defect affected greatly under the M-E interaction. However, when alpha is 0 degrees, the maximum stress and electrochemical corrosion are affected slightly by the sigma(A). Besides, when the hoop stress of the pipe is larger than its total axial stress, the largest corrosion rate at the defect with alpha of 0 degrees would be higher than that at the defect with alpha of 90 degrees. Thus, for the improvement of pipeline integrity management, the combined effects of internal pressure and sigma(A) should be taken into account for a more accurate prediction of local corrosion rate at the defect especially with alpha of 90 degrees.
Keyword ：
Corrosion assessment Corrosion assessment Finite element model Finite element model Inclination angle Inclination angle Mechano-electrochemical interaction Mechano-electrochemical interaction Pipelines Pipelines
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| GB/T 7714 | Zhang, Zhuwu , Chen, Shaohuang . Finite element modeling of local corrosion accelerated by the mechano-electrochemical coupling effect at defects on pipelines under combined effects of internal pressure and axial applied stress [J]. | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING , 2021 , 43 (5) . |
| MLA | Zhang, Zhuwu et al. "Finite element modeling of local corrosion accelerated by the mechano-electrochemical coupling effect at defects on pipelines under combined effects of internal pressure and axial applied stress" . | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING 43 . 5 (2021) . |
| APA | Zhang, Zhuwu , Chen, Shaohuang . Finite element modeling of local corrosion accelerated by the mechano-electrochemical coupling effect at defects on pipelines under combined effects of internal pressure and axial applied stress . | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING , 2021 , 43 (5) . |
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A 3-dimensional finite element model was built to determine the effect of inclination angle of a corrosion defect on local mechano-electrochemical (M-E) effect in a simulated soil solution. Because of the high effect of the defect inclination angle on the M-E effect, when the inclination angle is 0 degrees (i.e., the primary axis of the defect parallel to the longitudinal direction of the pipe), the greatest stress concentration level at the defect can be observed, which is associated with the lowest corrosion potential, the greatest anodic current density and the most serious accelerated localized corrosion. When the inclination angle is 90 degrees, the stress concentration level reduces and the corrosion potential becomes less negative, accompanying with the decreased anodic/cathodic current densities. Besides, when the ratio (r(ca)) of the primary axial length of the defect to its secondary axial length is 1, the defect inclination does not affect the stress and the electrochemical corrosion rate at the defect. With the increase of r(ca), the effect of the defect inclination angle is more apparent. (C) 2021 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
Keyword ：
Corrosion defect assessment Corrosion defect assessment Finite element model Finite element model Mechano-electrochemical effect Mechano-electrochemical effect Pipelines Pipelines
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| GB/T 7714 | Zhang, Zhu-Wu , Wang, Jin-Chang , Zhang, Jiu-Hong et al. Modeling of the mechano-electrochemical effect at corrosion defect with varied inclinations on oil/gas pipelines [J]. | PETROLEUM SCIENCE , 2021 , 18 (5) : 1520-1529 . |
| MLA | Zhang, Zhu-Wu et al. "Modeling of the mechano-electrochemical effect at corrosion defect with varied inclinations on oil/gas pipelines" . | PETROLEUM SCIENCE 18 . 5 (2021) : 1520-1529 . |
| APA | Zhang, Zhu-Wu , Wang, Jin-Chang , Zhang, Jiu-Hong , Cheng, Y. Frank . Modeling of the mechano-electrochemical effect at corrosion defect with varied inclinations on oil/gas pipelines . | PETROLEUM SCIENCE , 2021 , 18 (5) , 1520-1529 . |
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