Article
Chemistry, Multidisciplinary
Pablo Pou-Alvarez, Antonio Riveiro, Xose Ramon Novoa, Xueze Jin, Jesus del Val, Rafael Comesana, Mohamed Boutinguiza, Fernando Lusquinos, Julian R. Jones, Maria Teresa Perez-Prado, Juan Pou
Summary: The article introduces a new concept of locally controlling and guiding corrosion through laser surface treatment. Wet tests on AZ31 magnesium alloy samples show a 15-fold reduction in degradation rates with the treatment. Controlling the treatment conditions can restrict degradation to specific regions and drive it towards specific directions.
Article
Materials Science, Coatings & Films
Joel da Silva Rodrigues, Leonardo Marasca Antonini, Antonio Alexandre da Cunha Bastos, Jie Zhou, Celia de Fraga Malfatti
Summary: The study applied plasma electrolytic oxidation (PEO) to create a coating on a magnesium alloy, ZK30, enhancing its corrosion resistance and wear resistance for potential orthopedic applications involving friction and wear. This technology has shown promising results in reducing hydrogen release, decreasing susceptibility to localized corrosion, and altering surface topography and chemistry.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Biomedical
Bin Xie, Ming-Chun Zhao, Rong Xu, Ying-Chao Zhao, Dengfeng Yin, Chengde Gao, Andrej Atrens
Summary: Alloying with manganese can reduce the biodegradation rate of Mg alloys, improve antibacterial performance, and enhance cytocompatibility.
INTERNATIONAL JOURNAL OF BIOPRINTING
(2021)
Article
Metallurgy & Metallurgical Engineering
Tso-Chang Wu, Sameehan S. Joshi, Yee-Hsien Ho, Mangesh Pantawane, Subhasis Sinha, Narendra B. Dahotre
Summary: The study investigated the effects of laser surface melting on microstructure and surface topography evolution in AZ31B magnesium alloy, revealing that laser surface melting led to the formation of a refined microstructure and a progressively rougher surface. This resulted in improved wettability, corrosion resistance, and precipitation of mineral closer to hydroxyapatite in simulated body fluid for the samples treated with laser surface melting compared to untreated samples.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Qi Sun, Jie Yang, Rui Tian, Xiaoqiang Fan, Zhongni Liao, Minhao Zhu
Summary: In this study, a novel strategy using laser surface remelting (LSR) was proposed to modify the surface microstructure of a precipitate-hardened magnesium alloy, which led to synergistically enhanced corrosion and wear resistances. The experimental results showed that the surface average grain size was refined, the secondary phases were regularly distributed along the grain boundaries, and the surface hardness was improved after LSR treatment. The possible mechanisms responsible for the synergy of corrosion and wear performances were discussed.
MATERIALS CHARACTERIZATION
(2022)
Article
Optics
Wen Zhao, Qianqian Cao, Jun Hu
Summary: The study utilized nanosecond laser technology to fabricate parallel groove patterns on the surface of ZK60A magnesium alloy, investigating the influence of laser processing parameters on groove size. The results indicated changes in groove width and depth based on laser scanning speed and repetition frequency, with improvements in hardness of the laser processed samples. Additionally, electrochemical corrosion performances varied between the polished and laser patterned magnesium alloy samples, suggesting an enhancement in hydrophilicity but a potential reduction in corrosion resistance due to grain refinement.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jithu Jayaraj, A. Srinivasan, C. Arunchandran, V. Rajinikanth
Summary: This study proposes a two-stage chemical conversion coating process for magnesium alloys. The results show that the water-based coating has self-healing characteristics, while the ethanol-based coating has better corrosion resistance. Both coatings exhibit acceptable cell viability under physiological conditions.
APPLIED SURFACE SCIENCE
(2024)
Article
Metallurgy & Metallurgical Engineering
S. Fajardo, L. Miguelez, M. A. Arenas, J. de Damborenea, I Llorente, S. Feliu
Summary: The effect of laser surface melting on the corrosion resistance of AZ31 Mg alloy was investigated. The results showed that laser treatment significantly increased the corrosion resistance of the alloy, which could be attributed to the increased surface concentration and the formation of a passive-like region.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
Zeeshan Ur Rahman, Maqsood Ali, Ye-Tang Pan, David G. Churchill, Bon Heun Koo
Summary: In this study, the addition of (EDTA)4- in alkaline silicates electrolyte was found to result in thick and layered pancake-like materials with minimum cracks and porosity. The analysis also revealed that EDTA can significantly alter the surface layers composition and act as a passivation agent. However, no individual polycrystalline phases were formed. The corrosion potential of the coated AZ91 was positive, but the results were not consistent with the cyclic polarization tests.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Coatings & Films
Dilermando Nagle Travessa, Geovana Vilas Boas Guedes, Aline Capella de Oliveira, Katia Regina Cardoso, Virginie Roche, Alberto Moreira Jorge
Summary: Laser materials processing is an attractive technology with numerous applications in various materials and industrial segments, supported by ongoing progress in laser devices. The use of laser technology can significantly improve surface properties of metals, enhancing corrosion resistance and introducing beneficial surface characteristics.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Huaile Liu, Zhaopeng Tong, Yu Yang, Wangfan Zhou, Jianan Chen, Xuyang Pan, Xudong Ren
Summary: In this study, a surface modification strategy combining LST with PCC was proposed to enhance the corrosion resistance of magnesium alloy. Results showed that this strategy improved the adhesion and corrosion properties of the coating, with the sample pretreated with LST demonstrating superior corrosion resistance. The LTC sample exhibited the best long-term corrosion resistance among all samples tested.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Liu Li, Yunxiang Chen, Yanjin Lu, Sijie Qin, Gonghao Huang, Tingting Huang, Jinxin Lin
Summary: This study focused on improving the corrosion resistance of Ti6Al4V3Cu alloys produced by selective laser melting by fabricating antibacterial powders and applying different heat treatments. The research showed that adjusting the microstructure of the alloy through heat treatment can enhance its corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Coatings & Films
P. Pou-Alvarez, A. Riveiro, X. R. Novoa, M. Fernandez-Arias, J. del Val, R. Comesana, M. Boutinguiza, F. Lusquinos, J. Pou
Summary: This study examines the impact of pulse length on the topography and corrosion properties of AZ31 magnesium alloy surfaces treated with different lasers. Shorter pulse lengths resulted in less melt generation and increased aspect ratio of ablated features. All treatments significantly enhanced the corrosion resistance of the base material, with longer pulses providing longer-lasting protection compared to shorter pulses.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Saumyadeep Jana, Matt Olszta, Danny Edwards, Mark Engelhard, Avik Samanta, Hongtao Ding, Pratik Murkute, O. Burkan Isgor, Aashish Rohatgi
Summary: Laser surface processing improved the corrosion resistance of AZ31 alloy by forming a mixed metal oxide surface film and refining the size and number density of intermetallic particles.
Article
Materials Science, Coatings & Films
Simin Wan, Xiufang Cui, Guo Jin, Jianjun Ma, Yuyun Yang, Kejing Liu, Jian Li, Shuo Wang, Junyan Wang
Summary: In this study, LC-Cu3Al, LC-Cu6Al, and LC-Cu9Al coatings were designed and prepared on Mg-Li alloy substrates to achieve excellent wear and corrosion properties. The results show that the LC-Cu6Al coating exhibits the best hardness, wear resistance, and corrosion resistance. Using laser cladding Cu-Al alloy coatings is an excellent strategy to enhance the surface properties of Mg-Li alloy.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Wengang Zhai, Wei Zhou, Sharon Mui Ling Nai
Summary: The strength of 316L stainless steel was significantly increased by the addition of TiC nanoparticles, while maintaining a high level of ductility. The increase in strength was primarily due to Orowan strengthening from the nanoparticles, and the reduction in ductility was related to the suppression of twinning induced plasticity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Wengang Zhai, Wei Zhou, Zhiguang Zhu, Sharon Mui Ling Nai
Summary: Among various stainless steel types, 304L and 316L have significant engineering applications. The study found that SLM 304L has smaller grain size and contains two phases, while SLM 316L has higher hardness and yield strength.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Wengang Zhai, Naien Wu, Wei Zhou
Summary: Wire arc additive manufacturing (WAAM) is used to fabricate large components with high deposition rate. In this study, a metal-cored low-alloy high-strength welding filler metal was used to prepare single wall structures using WAAM process. The interpass temperature has a slight influence on the microstructure and mechanical properties, with the highest ultimate tensile strength observed at 350 degrees C.
Article
Materials Science, Multidisciplinary
Rong Gen Neo, Kaiqiang Wu, Sung Chyn Tan, Wei Zhou
Summary: Cold spray technology using micron-sized particles is increasingly used for reparative tasks. This study demonstrates that a larger standoff distance can be applied without a significant drop in velocity for cold spray applications requiring high maneuverability.
Article
Chemistry, Physical
Duy Nghia Luu, Wei Zhou, Sharon Mui Ling Nai, Yongjing Yang
Summary: The study investigated the addition of micron-TiC particles to an Inconel 718 matrix to fabricate a metal matrix composite via selective laser melting. The results showed that the addition of micron-TiC particles reduced solute segregation at the grain boundary and susceptibility to hot cracking. The particles absorbed solute materials through the Ostwald ripening mechanism and promoted the formation of nano-sized carbonitride precipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Duy Nghia Luu, Wei Zhou, Sharon Mui Ling Nai
Summary: Limited research has been conducted on Ni-based oxide dispersion strengthened alloys. In this study, selective laser melting technology was used to manufacture ODS Inconel 718-Y2O3 alloys, overcoming the limitations of traditional manufacturing methods. Y2O3 nanoparticles were mixed with Inconel 718 powder using low energy ball milling, resulting in homogeneous distribution throughout the matrix. The addition of 1.0 wt% of Y2O3 improved elongation, while excessive addition of 1.5 wt% led to negative effects on both strength and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Wengang Zhai, Wei Zhou, Sharon Mui Ling Nai
Summary: Additive manufacturing is a transformative approach for metal component fabrication. This research demonstrates that adding Ti during selective laser melting can significantly refine grain size without introducing undesirable intermetallic phases in 316L stainless steel. The method shows promise for tailoring microstructures and mechanical properties of various alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yongjing Yang, Aprilia Aprilia, Kaiqiang Wu, Sung Chyn Tan, Wei Zhou
Summary: This study demonstrates the potential application of induction heating as a rapid post-processing method for cold spray coatings. By using rapid induction heating, the porosity of the coatings was significantly reduced within a short period of time. This provides a new solution for the post-processing of cold spray coatings.
Article
Materials Science, Multidisciplinary
Yongjing Yang, Ayan Bhowmik, Jin Lee Tan, Zehui Du, Wei Zhou
Summary: This research successfully improved the bonding strength between SiC and aluminum alloys by using high-silicon content aluminum alloys as intermediate layers, providing a new strategy for joining different materials.
Article
Materials Science, Multidisciplinary
Adrian Wei-Yee Tan, Nataniel Yong Syn Tham, Yao Shian Chua, Kaiqiang Wu, Wen Sun, Erjia Liu, Sung Chyn Tan, Wei Zhou
Summary: In this study, the nickel-based alloy Inconel 625 was successfully coated onto grey cast iron using cold spray process, and the diffusion effects between the coating and substrate after heat treatment were studied. The results demonstrated that the coatings had dense and defect-free interfaces and showed stable hardness at high temperatures. The potential application of cold spray on nickel-based alloy coatings for restoration and surface enhancement of grey cast iron components was also highlighted.
Article
Chemistry, Physical
Aprilia Aprilia, Niroj Maharjan, Wei Zhou
Summary: This paper investigates whether decarburization occurs during the laser surface hardening of AISI 420 martensitic stainless steel. Comparisons were made with conventional air furnace-heated hardening process of the same steel material. It was found that decarburization seems to have occurred in the laser surface hardening, but its impact on the hardness of the steel's surface was not significant.
Article
Nanoscience & Nanotechnology
Kaiqiang Wu, Aprilia Aprilia, Sung Chyn Tan, Wei Zhou
Summary: Cold spray is a solid-state metal deposition technology that has a high deposition rate. This study investigated the use of induction heating for rapid post-processing of cold sprayed Inconel 625. The results showed that induction heating enhanced atomic diffusion, resulting in improved ductility and adhesion strength of the deposited material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Luming Xu, Ze Chai, Bo Peng, Wei Zhou, Xiaoqi Chen
Summary: To achieve high-performance nickel-based superalloys for aviation applications, post-heat treatments are essential. The microstructure and segregation ratio strongly influence the microstructural evolution. Gradient laser power deposition samples exhibit fine discrete Laves phases and achieve a uniform element distribution and precipitation after standard solution treatment plus aging, while constant laser power deposition samples require high-temperature homogenization plus solution treatment plus aging to achieve uniform element distribution. Different heat treatments have a greater impact on the fracture mechanism, resulting in a transition from transgranular to mixed mode fractures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Wengang Zhai, Naien Wu, Wei Zhou
Summary: The study investigates the additive manufacturing of 410L ferritic/martensitic stainless steel via laser metal deposition (LMD) process. Low carbon 410L powder with a carbon content of 0.004 wt% is used. Heat treatment is applied to study the evolution of microstructure and mechanical properties. The results show that heat-treated low carbon 410L exhibits refined equiaxed grains, high fraction of martensitic phase, improved yield strength, and ultimate tensile strength compared to conventionally fabricated steels.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Aprilia Aprilia, Wengang Zhai, Yibo Guo, Robert Shandro, Wei Zhou
Summary: The decarburization phenomenon of steels produced by wire-arc additive manufacturing (WAAM), both in heat-treated samples and as-printed parts, was studied. It was found that the depth of decarburization increased with higher temperature and longer duration of heat treatment. This study emphasizes the importance of controlling or minimizing decarburization for ensuring the quality and reliability of additively manufactured engineering components.
