Article
Materials Science, Multidisciplinary
Jun Gao, Jibo Tan, Ziyu Zhang, Ming Jiao, Xinqiang Wu, Lichen Tang, Yifeng Huang
Summary: Corrosion fatigue tests were conducted on Alloy 52/52 M weld metal in high-temperature water environment, revealing that CF cracks preferentially developed in columnar grain orientation at a 45 degrees - 75 degrees angle. Significant environmental assisted fatigue effects were observed under lower strain amplitudes, while the impact of strain rate on CF behavior was not significant. The mechanism of CF cracking related to welding columnar grain orientation was discussed.
Article
Materials Science, Multidisciplinary
Lina Gao, Fenfen Han, Shuangjian Chen, Xiang-Xi Ye, Bin Leng
Summary: This study investigates the corrosion behavior of Inconel 617 alloys with a Ni-cladding layer deposited by gas tungsten arc welding. The presence of the Ni-cladding layer significantly improves the corrosion resistance of Inconel 617, especially in alloys with a low chromium content. However, if the Ni-cladding layer is broken, it can accelerate the corrosion of Inconel 617 and induce a mass transfer of cobalt from Inconel 617 to the Ni-cladding layer in the presence of molten salts.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Article
Materials Science, Multidisciplinary
Hua Ai, Shulin Liu, Xiang-Xi Ye, Li Jiang, Bo Zhou, Xinmei Yang, Bin Leng, Zhijun Li
Summary: The study found that metallic impurities can accelerate the diffusion of Cr in Ni-26W-6Cr alloy, affecting the corrosion degree of the alloy. Additionally, the presence of Mo impurities in the salts can lead to unexpected depletion of W in the alloy.
Article
Energy & Fuels
Stuart Bell, Mitchell de Bruyn, Ted Steinberg, Geoffrey Will
Summary: This study analyzed the corrosion of a nickel superalloy in high temperature molten salts and found that thermal cycling reduced corrosion thickness and oxide layers provided protection for the metal.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Multidisciplinary
M. L. Hendery, M. T. Whittaker, B. J. Cockings, P. M. Mignanelli
Summary: This paper describes a study on hot corrosion damage in the nickel-based gas turbine alloy RR1000 coated with various salts at 600°C. The results show that sulphate has a greater impact on fatigue life, while chloride influences crack initiation behavior.
Article
Energy & Fuels
Stuart Bell, Mitchell de Bruyn, Ted Steinberg, Geoffrey Will
Summary: Using phase change materials as thermal energy storage media in conjunction with concentrating solar thermal power (CSP) is a promising approach, especially at higher temperatures. However, the corrosion resistance of high temperature alloys with molten salt media in CSP systems is crucial. The compatibility of alloy 625 with a eutectic salt mixture was investigated and a protective oxide layer was found to minimize thickness loss. The corrosion rate of this alloy/salt combination was determined, indicating potential long-term suitability for thermal energy storage systems.
Article
Nanoscience & Nanotechnology
Li Liang, Mingfang Xu, Yuhua Chen, Timing Zhang, Wei Tong, Huiting Liu, Huijuan Wang, Hongxiang Li
Summary: Thermal simulations were used to investigate the effects of welding heat on grain morphology, carbide evolution, and mechanical properties of Inconel 625 alloys manufactured by selective laser melting (SLM). The simulations revealed that welding heat led to the formation of prominent equiaxed grains and an increase in grain size with higher peak temperatures. Observations suggested that dislocation cross-slip was the dominant deformation mechanism responsible for the large strain-hardening rate in Inconel 625 alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
A. H. Pavan, R. L. Narayan, Shi-Hao Li, Kulvir Singh, U. Ramamurty
Summary: This study investigates the microstructure, hardness, impact toughness, and tensile properties of Haynes (R) 282 alloy after accelerated ageing. The results show that ageing promotes grain growth and precipitation of various phases and carbides, leading to a decrease in ductility and impact strength. The alloy shows serrated flow in high-temperature tensile tests, and the type of serrations depends on the ageing treatment. Fractographic examination reveals a transition from ductile fracture to brittle intergranular fracture with increasing ageing duration.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhenbo Zhu, Hefei Huang, Guanhong Lei, Yanping Wu, Cuilan Ren, Awen Liu, Zhiyong Zhu
Summary: The study found that helium ion irradiation accelerated the matrix corrosion of nickel-based alloys and led to different rates of intergranular corrosion under low and high ion fluences, due to the combined effects of various factors.
Article
Materials Science, Multidisciplinary
Manlang Cheng, Pei He, Longlin Lei, Xin Tan, Xiangyu Wang, Yangting Sun, Jin Li, Yiming Jiang
Summary: Welding has a detrimental effect on the corrosion resistance of both 304 and newly developed steel QN1803. This is mainly attributable to element segregation and decreased pitting corrosion resistance in the fusion zone (FZ) of QN1803 compared to 304.
Article
Metallurgy & Metallurgical Engineering
Jun-sheng Meng, Ming-xuan Chen, Xiao-ping Shi, Qiang Ma
Summary: The addition of Co to nickel-based superalloys with partial replacement of W promoted the formation of chromia scale and decreased the oxidation rate, while also enhancing the adhesion of Al2O3 scale and improving hot corrosion resistance under molten Na2SO4-NaCl salts.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Shulin Liu, Xiang-Xi Ye, Shuai Yan, Chen Ming, Yanling Lu, Xingtai Zhou
Summary: This study investigated the oxidation behavior of Ni-28 W alloy with Hf doping and found that Hf doping can significantly reduce the oxidation rate of the alloy and decrease the thickness of the internal oxide scales.
Article
Materials Science, Multidisciplinary
Shulin Liu, Xiang-Xi Ye, Chen Ming, Shuai Yan, Li Jiang, Zhijun Li, Xingtai Zhou
Summary: The study demonstrates that doping zirconium into Ni-28W-6Cr alloys can significantly improve the oxidation resistance of the alloy by reducing the oxidation rate and inner oxide thickness, as Zr charged +4 prefers to segregate in the inner NiWO4, inhibiting oxygen vacancies formation and reducing oxygen diffusion pathways.
Article
Materials Science, Multidisciplinary
Christian Hempel, Marcel Mandel, Christian Schimpf, Lutz Krueger
Summary: The hot corrosion behavior of plasma transferred arc welded Rene 41 in different salts was investigated, and the real machine operating conditions were simulated. The results showed that NaVO3 and NaCl had strong corrosive effects on the material, while Na2SO4 was less corrosive.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Article
Materials Science, Multidisciplinary
Caroline Karina Chandra, Niklas Sommer, Ben Heider, Marcel Hatzky, Ruediger Reitz, Stefan Boehm, Matthias Oechsner
Summary: Friction stir welding allows joining of high-strength, lightweight aluminum alloys below the melting point by induced plastic deformation. However, specific zones along the weld seam area are susceptible to localized corrosion. Various approaches, including the use of novel multipin welding tools, are presented to lower the corrosion susceptibility and enhance corrosion resistance. Immersion tests, electrochemical measurements, and microstructural analysis are conducted to understand the corrosion behavior and identify the mechanisms influencing corrosion initiation.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.