Article
Optics
Xin Zou, Lei Liu, Ting Chen, Lei Wu, Ke Chen, Liang Kong, Min Wang
Summary: Adhesive bonding between steel and carbon fiber reinforced plastics (CFRP) is improved by laser surface treatment. Surface roughness, energy, and chemical composition of steel are studied after different laser treatments. Results show that surface properties are closely related to the interfacial bonding strength between steel and adhesives.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zhiyi Jin, Xifang Zhang, Zhibao Hou, Zhenqiang Yao, Hong Shen
Summary: By creating a reticulate surface texture on a stainless steel counterpart, the friction coefficient of carbon fiber-reinforced polyetheretherketone composites can be effectively reduced, leading to a decrease in wear mechanism and achieving low friction coefficient and wear rate.
Article
Chemistry, Physical
Abdul Aziz, Ming Yang, Tetsuhide Shimizu, Tsuyoshi Furushima
Summary: In this study, a new constitutive model for surface roughening of stainless-steel thin metal foils (TMF) was proposed, taking into account the influence of martensitic phase transformation (MPT).
Article
Engineering, Manufacturing
Changgong Kim, Houshang Yin, Andrii Shmatok, Barton C. Prorok, Xiaoyuan Lou, Kathryn H. Matlack
Summary: Additive manufacturing (AM) has the potential to revolutionize manufacturing by fabricating complex geometries, but faces challenges in quality assessment. This study demonstrates the use of ultrasonic phase velocity measurements to evaluate defects and microstructural differences in AM stainless steel 316L parts, showing sensitivity to pore geometry and texture. The research suggests that the measured ultrasonic phase velocity is sensitive to changes in anisotropic elastic constants in AM materials.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Mechanical
Wen-Xuan Li, Yan Liu, Hai-Tao Duan, Yi-Han Wang, Sheng-Peng Zhan, Wu-Lin Zhang, Tian Yang, Guo-Zheng Li, Jia Dan
Summary: The laser surface texture process generates bulges on the material surface. Currently, the bulges are polished directly, but this method ignores its impact on the friction pairs. This study investigates the tribological properties of polished and unpolished textured surfaces using different shapes of texture on 316L stainless steel.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Nanoscience & Nanotechnology
Jiaxi Zhu, Lingyi Li, Dou Li, Xuguang Li, Hong Zhong, Shuangming Li, Liming Lei, Jibao Li, Yu Zhang
Summary: In this study, the laser repairing method was applied to 12Cr12Mo stainless steel, investigating microstructural evolution, texture characteristics, and hardness variation. The results showed that the deposited zone mainly consisted of martensite and tiny carbide particles, while the substrate contained tempered martensite and coarse carbide. The hardness increased sharply at the fusion line and tensile test results indicated comparable mechanical properties to wrought parts.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Chemical
Fatih Hayati Cakir
Summary: In this study, it was found that laser texturing significantly improves surface wettability of titanium alloy sheet blocks, thereby enhancing bonding performance. Using a two component epoxy adhesive binder, lap joint bonding was conducted after surface preparation. The results showed increased adhesive strength and shear lap joint bond strength compared to samples without laser texturing.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Materials Science, Multidisciplinary
Chunyang Pan, Changfeng Xu, Jun Zhou
Summary: Due to its good biocompatibility, 316L stainless steel is widely used in the manufacture of medical instruments and human implants. In this study, super-hydrophilic 316L steel surfaces were achieved by selecting appropriate laser process parameters. The effects of laser process parameters on surface microstructure and wetting ability were investigated, and the relationship between them was established. Additionally, the maintenance time of super-hydrophilicity on textured surfaces was studied.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Automation & Control Systems
Liudmila Basilio, Bruno Guimaraes, Oscar Carvalho, Cristina Fernandes, Daniel Figueiredo, Filipe Silva, Georgina Miranda
Summary: In this study, laser surface texturing was used to improve the bonding between WC-Co and 316L stainless steel. The addition of textures increased the shear bond strength, with cross-hatched micropatterns showing higher bonding strength. This approach has the potential to develop novel multi-material cutting tools with enhanced properties and performance.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jiajun Lu, Weidong Liu, Yonghua Zhao
Summary: This study investigates the influence of the processing method of bulk material on the surface microstructure of the resultant workpiece in electrochemical jet texturing (EJT). The experimental results reveal evident anisotropic behavior of the texture and demonstrate the considerable influence of the rolling process on EJT.
MATERIALS & DESIGN
(2022)
Article
Engineering, Industrial
Venkata Rajesh Saranam, Brigid Mullany, Ali Tabei, Subhasree Srenevas, Chris Evans, Brian K. Paul
Summary: By studying the different surface topographies and interactions between ground and cold-rolled samples with polished samples during diffusion bonding, it was found that conventional models tend to overestimate the bonded area, especially for ground samples. The analyses also revealed that cold-rolled surfaces have more contact area with less strain compared to ground samples, due to the presence of deep pits and smoother regions. This study suggests that the surface asperities of ground surfaces may intertwine during diffusion bonding.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Albena Daskalova, Liliya Angelova
Summary: Metal-based high-touch surfaces are easily contaminated with microbes, so there is a need to improve their antimicrobial properties. The current research explores the use of ultra-short laser radiation to induce micro- and nanostructuration on metallic surfaces, aiming to create antimicrobial properties. The impact of laser processing parameters on the surface structures and wettability properties of stainless steel samples is examined.
Article
Materials Science, Composites
Zequn Zhang, Hongyun Zhao, Yixuan Zhao, Shijia Wang, Jianhui Su, Bo Chen, Xiaoguo Song, Caiwang Tan
Summary: Metal-polymer hybrid joints have the potential to reduce weight and can be used in transportation industries. In this study, laser texturing was used to enhance the bonding strength of a laser-welded joint between 304 stainless steel and carbon fiber reinforced thermoplastics (CFRTP). The relationship between surface texture spacing and porosity characteristic as well as tensile property of the joint was investigated. It was found that the proper texture spacing improved the uniformity of joint strain distribution and enhanced joint strength.
POLYMER COMPOSITES
(2023)
Article
Nanoscience & Nanotechnology
Ceyhun Kose, Ceyhun Topal
Summary: In this study, laser beam welding technique was used to join AISI 2507 super duplex/AISI 317L austenitic stainless steels. The effects of heat input and post weld heat treatment (PWHT) on surface, texture, microstructure and mechanical properties were investigated. The results showed that the weld metal exhibited a duplex microstructure, while ferrite and austenite grains were detected in the base metal. The increase in heat input led to a decrease in tensile strength, hardness, and bending force, but an increase in toughness values in the welded samples. PWHT resulted in a reduction in tensile strength and hardness, as well as changes in the microstructure and orientation relationships.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ping Chen, Kangning Jin, Xiaojie Liu, Xiaoxi Qiao, Weixu Yang
Summary: Selective laser melting (SLM) and surface texturing were used to prepare textured 316L stainless steel (SS) samples with different parameters. The tribological performance of the SLM-prepared textured 316L SS under different friction conditions was investigated. The results showed that the texture characteristics, such as size and shape, had a significant impact on the friction coefficient and wear loss.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Review
Nutrition & Dietetics
Helena Mylise Sorensen, Keith D. Rochfort, Susan Maye, George MacLeod, Dermot Brabazon, Christine Loscher, Brian Freeland
Summary: Lactic acid bacteria (LAB) produce exopolysaccharides (EPS) during fermentation, which play an important role in fermented dairy products and have beneficial effects on human health. Understanding the parameters and conditions for EPS production from LAB is crucial for its application in the food industry.
Article
Materials Science, Multidisciplinary
Merve Nur Dogu, Kemal Davut, Muhannad Ahmed Obeidi, Mustafa Alp Yalcin, Hengfeng Gu, Thaddeus Song En Low, Jon Ginn, Dermot Brabazon
Summary: The recrystallization and grain growth behavior of IN718 alloy manufactured by laser powder bed fusion were studied. The texture evolution of the samples under different temperatures and holding times was investigated, and it was found that the formation of recrystallization nuclei was related to high defect density regions, while the presence of non-coherent precipitates limited the growth of recrystallized grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Emmanuel J. Ekoi, Giulia Degli-Alessandrini, Muhammad Zeeshan Mughal, Rajani K. Vijayaraghavan, Muhannad A. Obeidi, Robert Groarke, Igor Kraev, Satheesh Krishnamurthy, Dermot Brabazon
Summary: This study evaluates the phase and microstructural evolution of additively manufactured Nickel Titanium alloy across the interface with a stainless steel build plate. The complex microstructure and phase close to the interface, consisting of martensite, austenite, and Fe phases, were found to be necessary for excellent bonding. The diffusion behavior and element concentration at the interface were influenced by the process parameters used.
MATERIALS & DESIGN
(2022)
Article
Polymer Science
Chiara Mandolfino, Lucia Cassettari, Marco Pizzorni, Stefano Saccaro, Enrico Lertora
Summary: This study used a response surface-designed experiment approach to determine the optimal settings of laser treatment for surface preparation of CFRP prior to bonding. The effects of power, pitch, and lateral overlap on the tensile shear strength of adhesive bonded joints were investigated using a nanosecond pulsed Ytterbium-doped-fiber laser source and a scanning system. The results were modeled using Response Surface Methodology (RSM) to identify the best performance parameters and predict the behavior of joints for untested parameter settings.
Article
Biochemistry & Molecular Biology
N. Arul Manikandan, Ronan McCann, Dimitrios Kakavas, Keith D. Rochfort, Sithara P. Sreenilayam, Godze Alkan, Tom Stornetta, Allan Robert McGivern, Konstantinos Grintzalis, Bernd Friedrich, Greg Foley, Dermot Brabazon, Brian Freeland
Summary: Food spoilage leads to increased carbon dioxide emissions and food processing demand. This study developed anti-bacterial coatings using inkjet printing of silver nano-inks on food-grade polymer packaging, aiming to enhance food safety and reduce spoilage. Silver nanoparticles were synthesized and characterized, and all silver nanoparticles showed strong antibacterial activity against E. coli. The printed silver nano-inks on polymer reduced the bacterial cell population, and the bactericidal performance was comparable to penicillin-coated polymer. Ecotoxicity testing on daphniids showed the impact on freshwater environment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Polymer Science
Faisal Dakhelallah Al-Shalawi, Azmah Hanim Mohamed Ariff, Dong-Won Jung, Mohd Khairol Anuar Mohd Ariffin, Collin Looi Seng Kim, Dermot Brabazon, Maha Obaid Al-Osaimi
Summary: Patients with bone fractures or joint diseases often require implants that can mimic the function of natural bone. Metallic and synthetic polymer biomaterials, such as stainless steel, titanium, polyethene, and PEEK, are commonly used for load-bearing bone fractures. This review compares the classification, properties, and application of these biomaterials.
Article
Materials Science, Multidisciplinary
Merve Nur Dogu, Seren Ozer, Mustafa Alp Yalcin, Kemal Davut, Guney Mert Bilgin, Muhannad Ahmed Obeidi, Hakan Brodin, Hengfeng Gu, Dermot Brabazon
Summary: The effect of various solution heat treatment temperatures on the microstructure, grain morphology and crystallographic texture of IN939 fabricated by PBF-LB was examined. Different microstructures were observed compared to conventionally produced counterparts. After solution heat treatment, the microstructure transformed into a mixture of columnar and equiaxed grains. The presence of g' phase and the development of texture were also observed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Lehar Asip Khan, Hasan Ayub, Josiah Cherian Chekotu, Karthikeyan Tamilselvam, Corne Muilwijk, Inam Ul Ahad, Dermot Brabazon
Summary: This study developed finite element analysis models to simulate the load-bearing capability of Laser Powder Bed Fusion (PBF-LB) produced NiTi lattice structures. The strut diameter, unit cell side length, and lattice relative density were varied, affecting the energy absorption efficiency and maximum stress absorption efficiency. Transient analysis showed that energy absorption increased linearly until a stable stress plateau was reached.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Gowthaman Parivendhan, Philip Cardiff, Thomas Flint, Zeljko Tukovic, Muhannad Obeidi, Dermot Brabazon, Alojz Ivankovic
Summary: This study presents a numerical model of the Laser Beam Powder Bed Fusion (PBF-LB) process that incorporates Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). The model successfully captures the particle distribution in the powder bed and the formation and dynamics of the melt pool. It considers factors such as surface tension, Marangoni convection, and recoil pressure at the metal/gas interface.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
Neha Agarwal, Josephine Ryan Murphy, Tina Sadat Hashemi, Theo Mossop, Darragh O'Neill, John Power, Ali Shayegh, Dermot Brabazon
Summary: This study investigates the effect of heat treatment parameters on the performance of Ni-rich nickel-titanium wires intended for use as actuators. The study examines the changes in density, hardness, phase transition temperatures, microstructure, and alloy composition resulting from different heat treatment temperatures and times. It is found that increasing the heat treatment temperature and time can increase recovery strain and maximize the shape memory effect.
Article
Materials Science, Multidisciplinary
Lehar Asip Khan, Corne Muilwijk, Hasan Ayub, Inam Ul Ahad, Dermot Brabazon
Summary: NiTi is a metal alloy with shape memory and superelasticity, making it suitable for various engineering and biomedical applications. This study investigated the phase transformation, composition stability, and thermal expansion properties of NiTi tubes through heat treatment. The results showed that the phase transformation enthalpy and hardness of the NiTi tubes were affected by heat treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Marco Pizzorni, Enrico Lertora, Chiara Mandolfino
Summary: This experimental study investigates the characteristics of compression and low-velocity impact of different lattice structures made via Fused Deposition Modeling (FDM) technology, with the aim of using them as a framework for a lightweight polyurethane foam (PUF) composite. The study identifies a square-based pyramid geometry as the most efficient in energy dissipation and demonstrates enhanced dissipative capacity of the composite structure under static and dynamic loading conditions. This research provides promising applications for preserving the integrity of objects in accidental collisions.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Biomedical
Shummaila Rasheed, Waqas Akbar Lughmani, Muhammad Mahabat Khan, Dermot Brabazon, Muhannad Ahmed Obeidi, Inam Ul Ahad
Summary: Additively manufactured synthetic bone scaffolds have shown great potential in replacing and regenerating damaged bones. This study investigates the deformation pattern and mechanical response of polymeric bone scaffolds fabricated using the PolyJet 3D printing technique. The results reveal notable differences in yield strength and elastic modulus between cubic and hexagonal closed-packed designs, with cubic pore-shaped scaffolds exhibiting higher strength and stiffness. Furthermore, the study compares the performance of PJ-printed scaffolds with mu SLA-printed scaffolds, finding higher modulus and yield strength in the latter.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Food Science & Technology
Helena Mylise Sorensen, David Cunningham, Rengesh Balakrishnan, Susan Maye, George Macleod, Dermot Brabazon, Christine Loscher, Brian Freeland
Summary: This study proposes the application of artificial neural network (ANN) modelling for improved control and monitoring of Lactobacillus rhamnosus biomass production. Three ANN models were developed to predict biomass in batch and fed-batch bioprocesses with different media compositions, as well as the growth rate. The immunomodulatory effect of L. rhamnosus samples was examined, showing anti-inflammatory response. The findings highlight the potential of ANN modelling for optimizing L. rhamnosus bioprocesses as an immunomodulatory agent in the functional food industry.
CURRENT RESEARCH IN FOOD SCIENCE
(2023)