Article
Electrochemistry
YanHan Liew, Cem Ornek, Jinshan Pan, Dominique Thierry, Sudesh Wijesinghe, Daniel J. Blackwood
Summary: The micro-galvanic interactions between Cu-Fe-Mn-Li-containing aluminides and the alloy matrix of aluminium alloy AA2099 during chloride-induced corrosion were investigated in-situ, showing that the aluminides can ennoble their neighbouring matrix sites and the anode-to-cathode ratio has dynamic changes during corrosion. Higher local V-CPD activities were recorded during the earliest stages of corrosion, indicating a unique phenomenon in Al-Li AA2099 not seen in other aluminium alloys.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Manufacturing
Hong Ma, Guoliang Qin, Peihao Geng, Shilu Wang, Da Zhang
Summary: Friction welding of an aluminum alloy to stainless steel can achieve a sound joint with satisfying mechanical properties and corrosion resistance by restricting the formation of sub-micron level IMCs. The heat input significantly affects the mechanical properties of the joint, with the medium level producing the highest tensile strength. The thickness of the IMCs layer at the interfacial regions is influenced by the heat input level.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
S. T. Selvamani
Summary: The experimental study focused on the susceptibility of AA6061 grade aluminium alloys to stress corrosion cracking, revealing a mechanism of anodic mode crack propagation with a transgranular nature. Tafel electrochemical technique was utilized to analyze the performance and predict time to failure. Various sophisticated analytical techniques were employed to assess the integrity of dissimilar joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Rajesh Yadav, Ankur Kumar, Gajanan P. Chaudhari, A. G. Paradkar
Summary: The 5059H116 alloy welded by friction stir welding (FSW) showed superior corrosion resistance, while the gas metal arc welding (GMAW) sample had a shorter time to failure due to factors such as chemical heterogeneities and the presence of micro-porosity.
Article
Metallurgy & Metallurgical Engineering
Bai Lin-Yue, Shao Fei, Ma Qing-na, Xu Qian, Hu Jian-xiang, Hou Yi-nan
Summary: The corrosion fatigue fracture mechanism of friction stir welding (FSW) joints of 7075 aluminium alloy in 3.5% NaCl solution was investigated. The corrosion fatigue crack originated from the junction of nugget zone (NZ) and thermo-mechanical affected zone (TMAZ). Multiple crack sources developed simultaneously and merged into large cracks along the boundary line of NZ and TMAZ during propagation. Furthermore, a mutual reinforcement coupling existed between corrosion and cyclic loading during the initiation and propagation of corrosion fatigue crack. Considering the effect of welding residual stress is necessary for understanding the mechanism of corrosion fatigue fracture of FSW joints.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Manufacturing
Hong Ma, Guoliang Qin, Peihao Geng, Zhiyong Ao, Yong Chen
Summary: Different heat inputs during fusion-brazing welding can affect the thickness of intermetallic compounds (IMCs) layer in Al alloy/steel joints, including the formation of Fe-Al binary IMCs and Fe-Al-Si ternary IMCs. Welding under high heat input may lead to enhanced tunnelling corrosion and increase corrosion current density, while higher heat input can reduce corrosion of binary IMCs due to cathodic corrosion protection. Utilizing low heat input can preserve the corrosion resistance and mechanical performance of the joint.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
C. Nkoua, C. Josse, A. Proietti, R. Basseguy, C. Blanc
Summary: The influence of microorganism-induced surface modifications on the corrosion behaviour of 5083 H11 aluminium alloy was examined. Pre-immersion in natural seawater for 15 days to 2 months resulted in the formation of a dense oxy-hydroxyde layer on the AA5083 surface. This layer led to decreased cathodic and corrosion current densities, and increased passivity domain on the polarisation curves.
Article
Multidisciplinary Sciences
Sushanth Poojary, Vikas Marakini, Rajath N. Rao, Vijeesh Vijayan
Summary: This article investigates the effects of adding different amounts of Tin on the microstructure, cooling curve characteristics, and mechanical properties of cast Nickel Aluminium Bronze alloy. It is found that the addition of Tin changes the alloy's microstructure from columnar to equiaxed grains, resulting in improved hardness and tensile strength. The research also attempts to describe the mechanisms underlying the formation of equiaxed grains and phase transformations in Sn-treated NAB alloys.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Ranfeng Qiu, Peifeng Zhao, Jianghui Zhao, Hongxin Shi, Hua Yu
Summary: Aluminium alloy AA6061 and mild steel Q235 were welded by resistance element using an aluminium rivet as the element. The microstructure and properties of the joints were characterized, and the temperature distribution on the cross-section of the joints was calculated. The results showed a nugget formed at the interface between the rivet tip and steel of lower plate, and the maximum tensile shear load of the joints reached 5.82 kN at the welding current of 26 kA. This study revealed that the bearing interface of the resistance element welded joint between aluminium alloy and mild steel is like-to-like interface of aluminium alloy which strengthens the joint.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2023)
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
Nanoscience & Nanotechnology
Iuliia Morozova, Aleksandra Krolicka, Aleksei Obrosov, Yitong Yang, Nikolay Doynov, Sabine Weiss, Vesselin Michailov
Summary: This study elucidates the microhardness variations across the friction stir welded and impulse friction stir welded AA2024-T351 joints, with a special focus on the distinguished hardness peak within the heat-affected zone of the impulse welds. The hardness variation and microstructure evolution are analyzed to reveal the influence mechanisms of different welding techniques on material hardness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Can Peng, Gongwang Cao, Tianzhen Gu, Chuan Wang, Zhenyao Wang, Cheng Sun
Summary: The corrosion behavior of extruded 6061 Al alloy in simulated Nansha marine atmosphere was investigated using electrochemical measurements, microscopic observations, and X-ray photoelectron spectroscopy (XPS) tests. Severe intergranular and intragranular corrosion were observed on the sample surface, with Mg2Si phase and AlFeSi particles playing important roles. The preferential dissolution of Mg from the Mg2Si phase was found and explained thermodynamically. This study provides valuable information for understanding the corrosion behavior and mechanism of the 6061 Al alloy in simulated marine atmosphere and can aid in the development of new alloys resistant to corrosion in this environment in the future.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Optics
Salman Nisar, Ameera Noor, Aqueel Shah, Usama Siddiqui, Sohaib Zia Khan
Summary: This work focuses on studying the parametric effect of laser power and welding speed on peak temperatures, aspect ratio of weld bead width to depth, and heat affected zone width for AA5083 aluminium alloy through transient thermal analysis. Taguchi array was used to design and carry out the experiments using finite element simulations with ABAQUS software. The results showed a positive correlation between laser power and temperatures, and a negative correlation between welding speed and temperature. It was concluded that laser power significantly affects the weld bead width, while welding speed has a pronounced effect on peak temperatures.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Electrochemistry
Steven A. Policastro, Rachel M. Anderson, Carlos M. Hangarter
Summary: Measurements and theoretical predictions of galvanic corrosion between UNS S13800 and UNS A97075 in different electrolytes were compared. Discrepancies in corrosion current were analyzed, and a mechanism based on chemical reactions in the electrolyte to explain the corrosion phenomena was proposed.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Physics, Multidisciplinary
M. Bakkiyaraj, J. Ananth, V Sivamaran, P. K. Nagarajan
Summary: This article examines the properties of joints fabricated by friction welding (FW) using AA6061-T6 and AA7075 as examples of both similar and dissimilar metals. The effect of heat treatment after welding on the joint's metallurgical characteristics is also investigated. The findings demonstrate that the joint characteristics are enhanced by precipitate nucleation occurring in the joint interface under the heat treatment method of solutionizing heat treatment with synthetic ageing (STA). The tensile strength and microhardness of the joints made with both similar and dissimilar metals are influenced by the STA treatment in different ways.
Article
Metallurgy & Metallurgical Engineering
Christine Geers, Vedad Babic, Nooshin Mortazavi, Mats Halvarsson, Bo Jonsson, Lars-Gunnar Johansson, Itai Panas, Jan-Erik Svensson
OXIDATION OF METALS
(2017)
Article
Chemistry, Physical
N. Mortazavi, C. Geers, M. Esmaily, V Babic, M. Sattari, K. Lindgren, P. Malmberg, B. Jonsson, M. Halvarsson, J. E. Svensson, I Panas, L. G. Johansson
Article
Multidisciplinary Sciences
Antiope Lotsari, Anand K. Rajasekharan, Mats Halvarsson, Martin Andersson
NATURE COMMUNICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Y. M. Yan, A. Maltseva, P. Zhou, X. J. Li, Z. R. Zeng, O. Gharbi, K. Ogle, M. La Haye, M. Vaudescal, M. Esmaily, N. Birbilis, P. Volovitch
Article
Materials Science, Multidisciplinary
Q. Cao, M. Esmaily, R. L. Liu, N. Birbilis, S. Thomas
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2020)
Article
Multidisciplinary Sciences
M. Esmaily, A. N. Mortazavi, N. Birbilis, A. Allanore
SCIENTIFIC REPORTS
(2020)
Article
Engineering, Manufacturing
M. Esmaily, Z. Zeng, A. N. Mortazavi, A. Gullino, S. Choudhary, T. Derra, F. Benn, F. D'Elia, M. Muether, S. Thomas, A. Huang, A. Allanore, A. Kopp, N. Birbilis
ADDITIVE MANUFACTURING
(2020)
Article
Materials Science, Multidisciplinary
Zhuoran Zeng, Mengran Zhou, Peter Lynch, Frederic Mompiou, Qinfen Gu, Mohsen Esmaily, Yuanming Yan, Yao Qiu, Shiwei Xu, Hidetoshi Fujii, Chris Davies, Jian-Feng Nie, Nick Birbilis
Summary: The ductility of extruded polycrystalline pure magnesium with fine grain size is primarily supported by the sliding between grouped grains, grain rotation, and dislocation slip, which postpones the occurrence of localized stress concentration and significantly increases the ductility of pure Mg at room temperature.
Article
Materials Science, Multidisciplinary
A. N. Mortazavi, M. Esmaily, C. Geers, N. Birbilis, Jan-Erik Svensson, M. Halvarsson, D. Chandrasekaran, L. G. Johansson
Article
Materials Science, Multidisciplinary
M. Shahabi-Navid, M. Halvarsson, J. E. Svensson, A. Allanore, N. Birbilis, L. G. Johansson, M. Esmaily
Summary: The study found that the morphology and rate of localized corrosion of magnesium-aluminum alloys were significantly influenced by ambient CO2 levels, with corrosion sites more evenly distributed and shallower in the presence of CO2. In contrast, in a CO2-free atmosphere, the alloys were more prone to deep clustered cavities extending into the material.
Article
Multidisciplinary Sciences
M. Shahabi-Navid, Y. Cao, J. E. Svensson, A. Allanore, N. Birbilis, L. G. Johansson, M. Esmaily
SCIENTIFIC REPORTS
(2020)
Article
Energy & Fuels
A. Mortazavi, Y. Zhao, M. Esmaily, A. Allanore, J. Vidal, N. Birbilis
Summary: This study investigates the effect of salt purification on the corrosion behavior of a nickel-based alloy at high temperature. The addition of magnesium is found to improve the corrosion resistance of the alloy. The results also suggest that a single-step treatment of the salt could be used to control the impurity level if needed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Multidisciplinary
Mohsen Esmaily, Yao Qiu, Sedigheh Bigdeli, Mahesh B. Venkataraman, Antoine Allanore, Nick Birbilis
NPJ MATERIALS DEGRADATION
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
M. Esmaily, J. E. Svensson, L. G. Johansson
MAGNESIUM TECHNOLOGY 2017
(2017)
Article
Physics, Applied
Ehsan Hashemi, Filip Hjort, Martin Stattin, Tommy Ive, Olof Backe, Antiope Lotsari, Mats Halvarsson, David Adolph, Vincent Desmaris, Denis Meledin, Asa Haglund
APPLIED PHYSICS EXPRESS
(2017)
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.
