Article
Chemistry, Physical
Xinxin Zhang, You Lv, Teruo Hashimoto, Jan-Olov Nilsson, Xiaorong Zhou
Summary: In this study, the influence of trace level Cu on intergranular corrosion in AA6082 alloy was investigated using accelerated corrosion testing and high resolution electron microscopy. It was found that Al2Cu precipitates promoted IGC at the grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yuehua Sun, Fan Zhang, Richu Wang, Chaoqun Peng, Jian Ren, Guangsheng Song
Summary: The microstructure and corrosion behavior of Mg-8Li-3Al-2Zn(- 1.0Gd) alloys were studied. Galvanic corrosion occurs at the & alpha;-Mg/& beta;-Li phase interface in the homogenized LAZ832(-1.0Gd) alloys, while pitting corrosion occurs in the & alpha;-Mg matrix and & beta;-Li matrix. After hot extrusion, the corrosion form of the & alpha;-Mg matrix changes to intergranular corrosion. The corrosion resistance of LAZ832 alloy is effectively improved by combining Gd alloying and hot extrusion, with the as-extruded LAZ832-1.0Gd alloy showing the best corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Xiu-Rong Zhu, Jun Wang, Wei-Ning Shi, Xue-Bing Liu, Xin-Fang Zhang, Hai-Fei Zhou
Summary: Controlling precipitation through thermomechanical treatment is an important method to enhance the corrosion resistance of Al-Cu-Mg alloys. Cold rolling deformation can improve the resistance to intergranular corrosion in the solution-treated state, while cold rolling deformation in the retrogression-treated state changes the corrosion morphology from pitting to network corrosion.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
M. Mansouri Arani, N. S. Ramesh, X. Wang, N. Parson, M. Li, W. J. Poole
Summary: This study quantitatively investigated the strain localization in precipitate free zones (PFZ) of an Al-Mg-Si-Mn alloy using digital image correlation (DIC) and crystal plasticity simulations. The results showed that the thickness of PFZ and the orientation of the grain boundary relative to the loading axis were key factors affecting the level of strain localization.
Article
Materials Science, Multidisciplinary
Aluru Praveen Sekhar, Arijit Samaddar, Ashim Bikash Mandal, Debdulal Das
Summary: This report investigates the influence of ageing on the susceptibility to intergranular corrosion of an Al-Mg-Si alloy. It was found that the depth of corrosion increases with ageing time, and the dominant mode of corrosion gradually changes from minor pitting to uniform intergranular corrosion as ageing progresses.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Emad H. Bartawi, Oleg V. Mishin, Ghada Shaban, Jan H. Nordlien, Rajan Ambat
Summary: The microstructure and intergranular corrosion were studied in an extruded and aged Al-Mg-Si alloy doped with 0.05 wt% Cu after immersion in an acidified salt solution. Despite the low content of Cu, intergranular corrosion still occurs in this alloy. Electron microscopy analysis of the exposed surface in the corrosive environment does not show any significant difference in the fraction of corroded random and coincident site lattice high angle boundaries. Low angle boundaries with misorientations below 10 degrees are consistently found to be more resistant to intergranular corrosion than other boundary types.
Article
Materials Science, Multidisciplinary
Saif Haider Kayani, Heon-Young Ha, Young-Hee Cho, Hyeon-Woo Son, Jung-Moo Lee
Summary: The study investigates the influence of the electrochemical nature of intermetallic particles (IMPs) and dislocation density on the localized pitting corrosion behavior of Al-Si-Mg-Cu-Mn alloy. The presence of Cu-rich Q-phase and Mn-rich α-AlFeMnSi particles causes anodic dissolution of nearby Al, resulting in localized pitting. Kelvin-probe atomic force microscopy reveals that the high potential of Q-phase and α-AlFeMnSi particles makes them cathodic, leading to micro-galvanic coupling with the surrounding Al. The increased dislocation densities in Al regions adjacent to IMPs exacerbate localized pitting, leading to stress localization and decreased overall corrosion resistance of the alloy.
Article
Metallurgy & Metallurgical Engineering
Yuan-wei Sun, Zi-yi Wang, Qing-lin Pan, Wei-xue Chen, Zi-kang Yin, Dong-kun Li, Qian Zheng
Summary: The localized corrosion modes and their dependence on ageing conditions were investigated for an Al-7.82Zn-1.99Mg-2.41Cu-0.12Zr alloy. Intergranular corrosion was dominant in the UA temper due to small grain boundary precipitates (GBPs) and their low distribution continuity. Pitting corrosion was dominant in the T74 and T77 tempers due to larger GBPs and their discontinuous distribution. The corrosion mode of the T6 temper evolved from pitting corrosion to intergranular corrosion with immersion time.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Materials Science, Multidisciplinary
Junho Kim, Suhee Shin, Seunghyo Lee
Summary: This study aims to optimize the composition of recycled hypoeutectic Al-Si-Mg alloy to reduce CO2 emissions. The results show that increasing the Mg/Si ratio improves sacrificial protection, while increasing the Mg+Si content leads to a more refined and homogeneous distribution of Mg2Si, thus enhancing the corrosion resistance of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Qiuju Zheng, Jing Wu, Hongxiang Jiang, Lili Zhang, Jiuzhou Zhao, Jie He
Summary: The study found that micro-alloying element La can improve the corrosion resistance of Al-Mg-Si alloys by forming Mg2Si particles with a La-rich surface shell and isolated Si particles, which slows down the corrosion rate and inhibits localized corrosion.
Article
Materials Science, Multidisciplinary
Kaige Tang, Lili Wei, Hongfeng Huang, Jing Wang, Degui Li, Hongjie Jiang, Weizhen Zhang, Liuqing Liang, Shuhui Liu
Summary: The effect of grain size and second-phase distribution on the corrosion performance of Al-MgSi-Mn-Cr alloy was investigated. The transformation of the strengthening phase in the heat-affected zone reduced the joint's strengthening ability. The high grain boundary density and presence of second phases in the base metal increased the pitting corrosion susceptibility.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Shengbo Hu, Xuwen Yuan, Li Liu, Rui Liu, Fengguang Li, Jianyong Liu, Rui Guo, Wei Yang, Fuhui Wang
Summary: The corrosion and discharging behavior of Al-Zn-In-Mg-Ti alloy were studied at different pressures using various experimental techniques. The results showed that the self-corrosion and self-discharging process of the alloy went through three stages, all of which were accelerated by hydrostatic pressure. The discharging performance of the alloy decreased with increasing pressure due to the accelerated cathodic process and more severe intergranular corrosion. A corresponding cathodic protection design based on Al-Zn-In-Mg-Ti sacrificial anode with changing pressure was proposed, following an exponential function.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Leticia Cabrera-Correa, Leandro Gonzalez-Rovira, Adrian Ojeda-Lopez, Juan de Dios Lopez-Castro, F. Javier Botana
Summary: The effect of thermal ageing at 150 oC on the corrosion behaviour of Scalmalloy (R) alloy additively manufactured by laser powder bed fusion is investigated. The results show that cyclic polarisation curves, electrochemical impedance measurements, and mechanical tests exhibit similar results before and after the thermal treatment. However, electron microscopy characterisation reveals that the application of this temperature for sufficient time causes sensitization of the alloy to intergranular corrosion processes.
Article
Engineering, Manufacturing
Ton Bor, Marijn de Leede, Freek Deunk, Jesper Lind, Wout Lievestro, Henk-Jan Smit, Rob Aries, Vishal Dolas, Nick Helthuis, Martin Luckabauer, Remko Akkerman
Summary: The Friction Screw Extrusion Additive Manufacturing (FSEAM) process is a newly created process for additive manufacturing of low weight-high strength aluminum and magnesium alloys in the solid state. The study focused on the influence of the feed ratio on the quality, microstructure and mechanical properties of the fabricated builds. Solid builds free from defects were achieved at higher feed ratios, while lower feed ratios resulted in fabrication defects and reduced elongation values.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Jicun Ren, Zhiheng Hong, Qingshan Zhou, Xiaojing Xu, Siyuan Yin
Summary: This study investigated the effects of different aging temperatures on the microstructure and comprehensive properties of Al-Si-Mg alloys. The experimental results showed that the precipitates became the main phase after aging treatment, with the smallest size observed at 174 degrees C. Higher aging temperatures led to increased nucleation rate and decreased elongation of the alloy. The hardness, tensile strength, and corrosion resistance of the alloy were optimal after aging treatment at 180 degrees C x 8 h. However, the elongation was the lowest at this condition.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
A. M. Cassell, J. D. Robson, X. Zhou, T. Hashimoto, M. Besel
MATERIALS CHARACTERIZATION
(2020)
Article
Chemistry, Physical
Zelong Jin, Changrun Cai, Teruo Hashimoto, Yudie Yuan, DaeHoon Kang, John Hunter, Xiaorong Zhou
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Materials Science, Coatings & Films
S. Aliasghari, A. Rogov, P. Skeldon, X. Zhou, A. Yerokhin, A. Aliabadi, M. Ghorbani
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Yun Wang, Zhongping Que, Teruo Hashimoto, Xiaorong Zhou, Zhongyun Fan
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Metallurgy & Metallurgical Engineering
Bing Liu, Xiao-rong Zhou, Xin-xin Zhang
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2020)
Article
Materials Science, Multidisciplinary
Xinxin Zhang, You Lv, Sihan Tan, Zehua Dong, Xiaorong Zhou
Summary: This study investigated the microstructure and corrosion behavior of wire arc additive manufactured (WAAM) AA2024 alloy thin wall structure. It was found that localized corrosion primarily occurs at the melt pool border with a high volume fraction of eutectic S-phase, leading to localized corrosion initiated by de-alloying.
Article
Materials Science, Multidisciplinary
Lei Yang, Yunqiu Shi, Liujie Shen, Erlin Zhang, Gaowu Qin, Xiaopeng Lu, Xiaorong Zhou
Summary: The study found that Ag significantly influences the corrosion behavior of Mg-Mn-Ag alloys, enhances cathodic activation, and results in a significant increase in the corrosion rate of the alloy with immersion time.
Article
Materials Science, Composites
Yingwei Fan, Xiaorong Zhou
Summary: In this study, the debonding behavior at the fibre/matrix interface in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 composite was investigated. The interface debonding strength was found to be 108.2 MPa, occurring between the interface reaction zone and the carbon coating on the fibre surface. The carbon coating/SiC fibre interface and the RZ/matrix interface remained intact after the fibre was pushed out.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yanwu Guo, Wu Wei, Wei Shi, Xiaorong Zhou, Hui Huang, Shengping Wen, Xiaolan Wu, Kunyuan Gao, Li Rong, Peng Qi, Zuoren Nie
Summary: The Er and Zr modified Al-Mg alloy manufactured by selective laser melting showed improved mechanical properties and strength after aging treatment. The synergistic precipitation of Er and Zr led to the formation of bimodal grain structures, promoting phase evolution in the alloy.
Article
Materials Science, Multidisciplinary
Meilin Wang, Wu Wei, Wei Shi, Xiaorong Zhou, Shengping Wen, Xiaolan Wu, Kunyuan Gao, Li Rong, Peng Qi, Hui Huang, Zuoren Nie
Summary: Isothermal hot compression experiments were conducted to investigate the hot deformation behavior and optimum processing parameters of Al-Mg-Si-Er-Zr alloy. The results showed that dynamic recovery and continuous dynamic recrystallization were the main softening mechanisms. The addition of Er and Zr increased the activation energy due to the formation of Al3(Er, Zr) particles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yanwu Guo, Wu Wei, Hui Huang, Shengping Wen, Wei Shi, Xiaorong Zhou, Xiaolan Wu, Kunyuan Gao, Li Rong, Peng Qi, Zuoren Nie
Summary: The microstructure and mechanical properties of Er/Zr modified A357 alloy in as-built and stress relief annealing conditions were investigated to enhance the mechanical properties of Al-Si alloys fabricated by selective laser melting. The addition of 0.15 wt.% Er helped refine the cellular size and promote equiaxed grain formation. The average grain size of the modified sample was 3.1 +/- 1.4 mm, and the yield strength, tensile strength, and elongation reached 333 +/- 2 MPa, 454 +/- 1 MPa, and 12.5 +/- 1%, respectively. Stress relief annealing resulted in a decrease in strength and an increase in elongation, but the nano-sized L12-structure particles in the Er-Zr composite modified sample compensated for the loss of strength to some extent. Therefore, Er-Zr composite modification is an effective method to improve the comprehensive mechanical properties of SLM processed Al-Si alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Yu Zheng, Xiaorong Zhou, Yunbai Luo, Ping Yu
Article
Materials Science, Multidisciplinary
A. Matthew Glenn, Anthony E. Hughes, Colin M. MacRae, Nicholas C. Wilson, Aaron Torpy, Xiaorong Zhou
MICROSCOPY AND MICROANALYSIS
(2020)
Article
Electrochemistry
Y. Ma, K. Li, X. Zhou, H. Wu, P. Zhu, B. Yang, Y. Liao, S. He
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Materials Science, Multidisciplinary
S. Aliasghari, P. Skeldon, X. Zhou, R. Valizadeh, T. Junginger, G. B. G. Stenning, G. Burt
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2019)
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.
