Article
Materials Science, Multidisciplinary
Yong Gui, Zhiyuan Liang, Shuo Wang, Qinxin Zhao
Summary: The effect of stress on the corrosion behavior and mechanical properties of T91 tube exposed to high-temperature supercritical carbon dioxide (S-CO2) was studied. The results showed that the yield strength, ultimate tensile strength, and elongation of T91 tube decreased after exposure to S-CO2. In addition, a significant amount of carbide precipitates were observed in the Fe-Cr-rich corrosion layer of T91 tube, which was attributed to the increased ion diffusion and carburizing rate under stress. Consequently, the corrosion rate of T91 tube was significantly faster than that of T91 coupon.
Article
Materials Science, Multidisciplinary
Yun Xie, Yuchen Cai, Jianqiang Zhang, Brian Gleeson, David J. Young
Summary: The corrosion behavior of chromium-containing alloys in different atmospheres at high temperatures is influenced by sulphate deposits, with commercial alloys being more susceptible to acidic corrosion under these conditions.
Article
Materials Science, Multidisciplinary
Christiane Stephan-Scherb, Juho Lehmusto, Florian Falk, Oded Sobol, Bruce A. Pint
Summary: This study presents a comprehensive investigation on the combined oxidation/sulfidation induced by mixed-gas atmospheres using label molecules. Fe-Cr model alloys with varying Cr-content were exposed to different gas mixtures and characterized using secondary ion mass spectroscopy and energy dispersive X-ray diffraction. The results indicate that both S16O2 and H218O contribute to the oxidation of the alloys, with varying extents depending on the Cr-content.
Article
Materials Science, Multidisciplinary
Kaiyang Li, Yimin Zeng, Jing-Li Luo
Summary: The study found that adding 100 ppm H2O significantly increased oxidation reactions in supercritical CO2, while the presence of O2 led to the opposite tendency. Alloy 740 showed better resistance to carburization and exhibited good corrosion resistance in the supercritical CO2 environment when compared to SS310.
Article
Materials Science, Multidisciplinary
Hong Yang, Weiwei Liu, Bin Gong, E. Jiang, Yanping Huang, Gen Zhang, Yongfu Zhao
Summary: The corrosion behaviors of T91 and 316 materials were studied under supercritical carbon dioxide environment, revealing different corrosion products and mechanisms.
Article
Materials Science, Multidisciplinary
Khaing Khaing Aye, Thuan Dinh Nguyen, Jianqiang Zhang, David J. Young
Summary: The study showed that the addition of 0.5% silicon can effectively suppress the corrosion of Fe-20Cr and Fe-20Cr-20Ni alloys in high-temperature gas environments, forming a thin protective oxide layer. In chloride-containing gases, the addition of silicon can significantly improve the oxidation resistance of the alloys.
Article
Materials Science, Multidisciplinary
Yong Gui, Qinxin Zhao, Shuo Wang, Zhiyuan Liang
Summary: The contribution of shot-peening treatment on the corrosion resistance of Sanicro 25 to supercritical carbon dioxide was investigated. The treatment resulted in thicker corrosion layers and accelerated the formation of carbide-containing precipitates. Shot-peened Sanicro 25 exhibited increased voids and stress concentration, leading to scale spallation after exposure.
Article
Nuclear Science & Technology
Wei Zheng, Huang Zhang, Bin Du, Haoxiang Li, Huaqiang Yin, Xuedong He, Tao Ma
Summary: In this study, the oxidation and carburization behaviors of Inconel 617 and Incoloy 800H in impure helium at 950 degrees C were investigated. Different ratios of PH2/PH2O and PCH4/ PH2O were set, which resulted in different oxidation and carburization behaviors of the alloys. The presence of a silicon oxide interlayer in Incoloy 800H led to poor adhesion of the oxide layer, making it more susceptible to destruction at high temperatures and weaker resistance to carburization.
ANNALS OF NUCLEAR ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Zhu Liu, Jiachen Long, Haozhan Su, Shuo Cong, Kai Chen, Peng Wang, Zhengang Duan, Zhaodandan Ma, Zhangjian Zhou, Lefu Zhang, Xianglong Guo
Summary: The crack growth behavior of a cold worked alumina-forming austenitic steel in supercritical carbon dioxide and argon was investigated. The study found that the crack growth rates in supercritical carbon dioxide were higher than in argon at temperatures ranging from 550°C to 650°C. Creep cavities were observed near the crack growth paths and ahead of the crack tips in both environments. Higher cavity density was observed in the specimen tested in supercritical carbon dioxide, which was caused by oxidation and carburization.
Review
Chemistry, Physical
Liujie Yang, Hongchen Qian, Wenjun Kuang
Summary: This paper mainly reviews the oxidation behavior, carburization behavior and stress corrosion behavior of heat-resisting alloys in high-temperature CO2, and analyzes the factors affecting these behaviors. The results of this study are of great significance for the development of structural materials for the supercritical carbon dioxide Brayton cycle.
Article
Metallurgy & Metallurgical Engineering
Yun Xie, Yuchen Cai, Jianqiang Zhang, Brian Gleeson, David J. Young
Summary: The corrosion behavior of Fe-based alloys with 25 wt% Cr in CO2-H2O gases at 750 degrees C was studied with and without sulphate deposits. Without sulphate deposits, ferritic alloys outperformed austenitic alloys in terms of corrosion resistance. The effects of sulphate deposits on external scaling and internal sulphidation of the alloys were different, with interactions between sulfur and metal cations at chromia grain boundaries playing a key role.
OXIDATION OF METALS
(2021)
Review
Materials Science, Multidisciplinary
Kaiyang Li, Zhongliang Zhu, Bo Xiao, Jing-Li Luo, Naiqiang Zhang
Summary: The supercritical CO2 (S-CO2) Brayton cycle is highly efficient and has a simple layout and compact turbomachinery, making it a popular choice in the field of thermal cycles. However, the corrosion-related degradation of constructional materials still limits its broad applications. This comprehensive review examines the corrosion behavior of alloys in S-CO2 environments, analyzing the effects of temperature, pressure, impurity, alloying elements & structure, sample thickness, welding, coating, and surface treatments on corrosion. Additionally, stress-assisted corrosion, including tensile behavior, creep, stress corrosion cracking, fatigue, and thermal cycling, is thoroughly discussed.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Florian Falk, Oded Sobol, Christiane Stephan-Scherb
Summary: This study investigates the impact of the microstructure of Fe-16Cr-0.2C on oxide layer formation at 650 degrees C in Ar0.5 % SO2. The results show that heat-treatment modification of the alloy is advantageous, with Cr-carbides supporting chromia formation and reducing sulphidation when their area fraction is low and diameter is small.
Article
Chemistry, Physical
Gen Zhang, E. Jiang, Weiwei Liu, Hong Yang, Yulong Wu, Yanping Huang
Summary: In this study, the compatibility and long-term integrity of candidate structural materials in high-temperature and high-pressure SCO2 were tested. The results showed that the corrosion kinetics of 316NG and 800H followed a near-cubic law. After 3000 hours of exposure, all oxide layers were continuous, compact, and protective. In the case of carburization, dark spots and enrichment of trace elements were observed.
Article
Materials Science, Multidisciplinary
Qianlin Wu, Yu Liu, Zhonghua Zhang, Yameng Qi, Chunxia Zhang, Haitian Zheng, Yang Xu
Summary: The study found that adding (Mo, Mo/Ni) to Fe-9Cr alloy can improve carbide precipitation, oxidation behavior, and high-temperature tensile properties.
Article
Materials Science, Multidisciplinary
Santanu De, S. Palit Sagar, S. Dey, Amit Prakash, I. Chattoraj
Article
Engineering, Mechanical
Raghuvir Singh, J. Swaminathan, S. Paswan, V. Rajinikanth, I. Chattoraj
ENGINEERING FAILURE ANALYSIS
(2011)
Article
Engineering, Mechanical
A. Roy, I. Manna, I. Chattoraj
INTERNATIONAL JOURNAL OF FATIGUE
(2014)
Article
Nanoscience & Nanotechnology
Arijit Roy, I. Manna, S. Tarafder, I. Chattoraj
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2013)
Article
Nanoscience & Nanotechnology
Arijit Roy, I. Manna, S. Tarafder, S. Sivaprasad, S. Paswan, I. Chattoraj
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2013)
Article
Materials Science, Multidisciplinary
M. Tarafder, I. Chattoraj, S. Tarafder, M. Nasipuri
MATERIALS SCIENCE AND TECHNOLOGY
(2009)
Article
Materials Science, Multidisciplinary
Raghuvir Singh, Gautam Das, P. K. Singh, I. Chattoraj
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2009)
Article
Materials Science, Multidisciplinary
S. Dey, S. K. Das, A. Basumallick, I. Chattoraj
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2010)
Article
Materials Science, Multidisciplinary
Raghuvir Singh, S. Ghosh Chowdhury, Gautam Das, P. K. Singh, I. Chattoraj
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2012)
Article
Materials Science, Multidisciplinary
Raghuvir Singh, Mukesh Kumar, Mainak Ghosh, Gautam Das, P. K. Singh, I. Chattoraj
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2013)
Correction
Materials Science, Multidisciplinary
Raghuvir Singh, Mukesh Kumar, Mainak Ghosh, Gautam Das, P. K. Singh, I. Chattoraj
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2013)
Article
Nanoscience & Nanotechnology
Mita Tarafder, S. K. Das, I. Chattoraj, M. Nasipuri, S. Tarafder
SCRIPTA MATERIALIA
(2010)
Proceedings Paper
Materials Science, Multidisciplinary
Indranil Chattoraj
CENTURY OF STAINLESS STEELS
(2013)
Proceedings Paper
Materials Science, Multidisciplinary
Raghuvir Singh, S. Ghosh Chowdhury, Gautam Das, P. K. Singh, I. Chattoraj
TEXTURES OF MATERIALS, PTS 1 AND 2
(2012)
Article
Engineering, Mechanical
Willy Ank de Morais, Railson Bolsoni Falcao, Mario Boccalini Jr, Fernando Jose Gomes Landgraf
Summary: This study compares the fatigue behavior of bcc Nb-48 wt%Ti (Ti-36at%Nb) alloy parts processed by Laser Powder Bed Fusion (L-PBF) using two different types of powders (spherical powder produced by Plasma Atomization and irregularly shaped powder produced by Hydride-Dehydride). The results show that the fatigue behavior is similar for both powders, but the specimens produced from the Hydride-Dehydride powder have higher dispersed results. Fracture primarily occurs in the porosities near the machined sample surface, and the fatigue cracks propagate in a zigzag mode parallel to the L-PBF building direction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Guoxi Jing, Shuai Sun, Teng Ma, Shubo Li, Tian Ma, Junchao Wei, Jianchao Pang
Summary: This study proposes a parameter identification method for predicting the TMF life of CGI materials used in cylinder heads. The study evaluates the TMF behavior of RuT450 material and successfully predicts its TMF life using multi-objective optimization. The results highlight the influence of plastic strain amplitude, temperature, and strain rate on the damage mechanism and life prediction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xin Zhang, Xu Li, Weipeng Xu, Kuidong Gao, Kao Jiang, Xinyu Wang, Hongxin Wei
Summary: Conical picks are commonly used in tunnel excavation and often experience high temperatures during the cutting process. This study investigated the influence of temperature on the wear of conical picks and proposed a method for measuring rock abrasiveness that takes into account the thermal effect. The experimental results showed that cooling liquid reduced the maximum temperature and the mean mass loss of the conical pick. Additionally, the study examined the characteristics of oxygen and found evidence of peeling, cracking, and oxidation on the grinding rod used for rock abrasiveness measurement.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Vivek Srivastava, Deependra Singh, A. G. Rao, V. P. Deshmukh
Summary: Engine gear failures are a significant concern in various industries. Investigating each gear failure and determining the root cause is important for preventing future failures. This study used experimental and numerical analysis techniques to investigate the premature failure of a flywheel gear in a marine diesel engine. The findings revealed that the gear failed due to overload stresses caused by overload torque generated from sudden inertial thrust in the internal combustionengine.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jun Zhang, Weidong Liu, Feilong Liu, Zhiqiang Yang, Jinfang Peng, Minhao Zhu
Summary: During a major overhaul of an aeroengine, a cracked stator vane of the low-pressure compressor was discovered, with the crack originating from a corrosion pit located on the arc transition between the leading edge and the upper edge plate. The fracture surface exhibited signs of fatigue cracks, indicating a pit-related fatigue crack. Metallographic examination revealed that most corrosion pits were distributed beneath the bulging or peeling paint layer on the leading edge and the concave side. Identification of the corrosion products showed the presence of sulfate and alumina, suggesting atmospheric corrosion as a likely cause for the cracked stator vane.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Juan Jose Jimenez de Cisneros Fonfria, Ester Olmeda, Susana Sanz, Maria Garrosa, Vicente Diaz
Summary: Energy absorbing devices in vehicles can partially transform impact energy and protect passengers. In this paper, the failure analysis of the underframe crumple zone in a train car was conducted through finite element simulations, showing that the component acted properly after the impact.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Fengqi Zhang, Gang Luo, Haiyang Zhang, Peihong Cong, Lulu Liu, Wei Chen
Summary: In this study, a predictive model for bird strike trajectory was developed based on the quasi-linear viscoelastic model. By combining simulation analysis under multiple conditions, the model reproduced the trajectory change law in low and medium speed bird impact experiments.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
S. M. de Gouveia, L. de Abreu Correa, D. B. Teles, M. Oliveira, T. G. R. Clarke
Summary: Emergency Shutdown Valves (EDSVs) are used in industrial applications to interrupt fluid flow during hazardous events. The damage to the valve seats can be detected by analyzing the pressure and torque data. This study compared three processing options and found that evaluating the complete signature with a Gradient Boosting Classifier algorithm is the most effective strategy.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xinyan Jin, Kai Wang, Hongwei Qian
Summary: This study investigated the root cause of an abnormal premature groove-clogging failure on a sink roll in a hot-dip galvanizing line. It was found that the failure was caused by the buildup of a large amount of Fe2Al5Znx dross in the grooves, and the key factor was the control of Tstrip.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Zhiqiang Li, Jie Li, Cen Li, Xiaodong Xie, Zhiyong Yang
Summary: In this study, the microstructure evolution of the material in the hot spot area of the high-speed train brake disc was observed and the mechanism of mechanical property degradation was obtained through tensile tests. The research results provide guidance for crack damage identification of the brake disc and condition-based maintenance.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Lijia Luo, Yincheng Wang, Wei Chen, Zuming Zhao, Wenfei Chen, Shiyi Bao
Summary: Tube-to-tube impact wear is a significant factor in the failure of alloy 690 tubes in nuclear steam generators. This paper investigates the wear damage mechanism and detection method of alloy 690 tubes under tube-to-tube impact loads. The results reveal the wear damage mechanism through analysis of macro and micro morphologies as well as metallographic structures. A nonlinear ultrasonic wave mixing method is proposed for damage detection and a detection device is developed to implement this method. Experimental results indicate that the damage mode of tube-to-tube impact wear varies with impact load and cycle number, and the nonlinear modulation index is effective in assessing the damage degree of alloy 690 tubes.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xing-Ju Yang, Feng Lin, Xu Du, Lu Qiu
Summary: This paper proposes a novel method of improving the progressive collapse resistance of RC frame structures by adding locally debonded kinked steel plates (KPs). Experimental tests and finite element analysis reveal that the addition of KPs significantly enhances the ultimate resistance and deformability of the beam-slab substructures. The mechanism of resistance improvement is explained, and an analytical model is developed for predicting the ultimate resistance of the structures.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xiaohe Wang, Zengqiang Cao
Summary: This paper presents a dynamic installation (DI) method based on electromagnetic force to reduce damage to composite laminates and improve joint performance. The study shows that DI can effectively decrease installation resistance, reduce severe damage to laminates, and improve stress distribution in the joint.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jitong Cui, Yingying Kong, Cuiwei Liu, Baoping Cai, Faisal Khan, Yuxing Li
Summary: This paper presents a method for quantifying the failure probability of hydrogen doped pipelines and utilizes Bayesian network for quantitative calculation. The results show that this method can more accurately assess the failure probability of hydrogen doped pipelines and provide a decision basis for preventing failure accidents.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Yiping Jiang, Maoru Chi, Jungang Yang, Liangcheng Dai, Yuchen Xie, Zhaotuan Guo
Summary: This article investigates and simulates the derailment of empty freight trains at the switch section of a turnout in the diverging route, and proposes preventive measures. The results show that the derailment is caused by the combined effect of various factors, and reducing the longitudinal coupler force and the wheel rail friction coefficient can decrease the possibility of derailment. Additionally, installing a guard rail in front of the turnout can effectively prevent derailment.
ENGINEERING FAILURE ANALYSIS
(2024)