Residual Stress in Friction Stir Welding of Dissimilar Aluminum Alloys: A Parametric Study.

Welding-induced residual stress has the capacity to significantly compromise the integrity of mechanical components. Its minimization therefore plays a critical role in the selection of process parameters during the welding process. Friction stir welding is a useful joining technique to weld many materials that are not amenable to the traditional welding techniques.

A Comparative Finite Element Analysis of Titanium, Autogenous Bone, and Polyetheretherketone (PEEK)-Based Solutions for Mandibular Reconstruction.

Unlabelled: Mandibular reconstruction is essential for restoring both function and aesthetics after segmental resection due to tumoral pathology. This study aimed to conduct a comparative analysis of three reconstruction strategies for defects resulting from segmental mandibular resection, utilizing finite element analysis (FEA).

Methods: A digital model of the mandible was created from CBCT data and optimized for FEA.

Preparation and Physical Properties of Quaternary MnFeSiAl Alloy Powders with Heusler and β-Mn Structures.

Manganese-based alloys with the composition MnFeZ (Z = Si, Al) have been extensively investigated in recent years due to their potential applications in spintronics. The MnFeSi alloy, prepared in the form of ingots, powders, or ribbons, exhibits either a cubic full-Heusler (2) structure, an inverse-Heusler (XA) structure, or a combination of both. In contrast, the MnFeAl alloy has so far been synthesized only in the form of ingots, featuring a primitive cubic (β-Mn type) structure.

Structure and Corrosion Resistance of Fe40Al5Cr0.2TiB Alloy After Casting and After Homogenization Annealing.

This article shows the results of research conducted on the corrosion resistance of the FeAl (Fe40Al5Cr0.2TiB) alloy in two variants: the alloy after casting and after homogenization annealing (1000 °C, 93 h). Analysis of the microstructure of these alloys was conducted on the light microscope, and the phase composition was determined by X-ray diffraction.

Four-Dimensional Printing of β-Tricalcium Phosphate-Modified Shape Memory Polymers for Bone Scaffolds in Osteochondral Regeneration.

The use of scaffolds for osteochondral tissue regeneration requires an appropriate selection of materials and manufacturing techniques that provide the basis for supporting both cartilage and bone tissue formation. As scaffolds are designed to replicate a part of the replaced tissue and ensure cell growth and differentiation, implantable materials have to meet various biological requirements, e.g.

Evaluation of the Tribological Behavior of Materials Used for the Production of Orthodontic Devices in 3D DLP Printing Technology, Due to Oral Cavity Environmental Factors.

This study evaluated the effect of oral cavity environmental factors on the friction and wear of materials used in 3D-printed orthodontic devices. Commercial materials GR-10 (Pro3Dure) and NextDent SG (NextDent) were examined, with samples produced using ASIGA UV MAX and Phrozen Shuffle Lite 3D printers. Our tests included measurements of hardness, stiffness, elastic modulus, cyclic loading, scratch resistance, and tribological assessments in oscillatory motion.

Microstructure, Hardness, and Wear Behavior of Layers Obtained by Electric Arc Hardfacing Processes.

Hardfacing is a welding-related technique aimed at depositing a harder and tougher layer onto a softer, less wear-resistant substrate or base metal. This process enhances the abrasion resistance of the component, increasing its durability under working conditions. A key feature of hardfacing is dilution, which refers to the mixing of the hardfacing layer and the base metal.

Investigation of Biodegradation, Artificial Aging and Antibacterial Properties of Poly(Butylene Succinate) Biocomposites with Onion Peels and Wheat Bran.

The present article focuses on the characterization of the new biocomposites of poly(butylene succinate) (PBS) with fillers of plant origin such as onion peels (OP) and durum wheat bran WB () subjected to composting and artificial aging. The susceptibility to fungal growth, cytotoxicity and antibacterial properties were also examined. The biodegradation of the samples was investigated under normalized conditions simulating an intensive aerobic composting process.

A Critical Review of the Decarbonisation Potential in the U.K. Cement Industry.

As urbanisation and infrastructure development continue to drive rising cement demand, the imperative to significantly reduce emissions from this emissions-intensive sector has become increasingly urgent, especially in the context of global climate goals such as achieving net zero emissions by 2050. This review examines the status, challenges and prospects of low-carbon cement technologies and mitigation strategies through the lens of the U.K.

Steel Ball Impact on SiC/AlSi12 Interpenetrated Composite by Peridynamics.

Silicon carbide and an aluminum alloy (SiC/AlSi12) composite are obtained during the pressurized casting process of the aluminum alloy into the SiC foam. The foam acts as a high-stiffness skeleton that strengthens the aluminum alloy matrix. The goal of the paper is to describe the behavior of the material, considering its internal structure.

Sustainable Management of Photovoltaic Waste Through Recycling and Material Use in the Construction Industry.

The rapid expansion of photovoltaic (PV) technology as a source of renewable energy has resulted in a significant increase in PV panel waste, creating environmental and economic challenges. A promising strategy to address these challenges is the reuse of glass waste from decommissioned PV panels as a component of cementitious materials. This review explores the potential of integrating glass waste from PV panels into cementitious materials, focusing on its impact on their mechanical, thermal, and durability properties.

Analysis of Porosity-Water/Binder Index for Prediction of Strength and Stiffness of Cemented Sands: A Comparative Study.

Artificial sand cementation improves stability, stiffness, and mechanical strength, making it a critical process in geotechnical applications. This study analyzes the capability of the porosity-water/binding agent index (ηCw/Biv) to predict cemented sands' unconfined compressive strength (qu) and stiffness (Go). Four Colombian sands, i.

Numerical Simulation of Compressive Testing of Sandwich Structures with Novel Triply Periodic Minimal Surface Cores.

Sandwich structures with triply periodic minimal surface (TPMS) cores have garnered research attention due to their potential to address challenges in lightweight solutions, high-strength designs, and energy absorption capabilities. This study focuses on performing finite element analyses (FEAs) on eight novel TPMS cores and one stochastic topology. It presents a method of analysis obtained through implicit modeling in simulations and examines whether the results obtained differ from a conventional method that uses a non-uniform rational B-spline (NURBS) approach.

Recycling of Agricultural Film Wastes for Use as a Binder in Building Composites.

Plastic film, also known as low-density polyethylene (LDPE), poses serious environmental challenges due to mass production, short life cycle, and poor waste management. The main aim of this paper was to examine the suitability of using agricultural waste film as a binder in construction composites instead of the traditional cement slurry. Molten at temperatures of around 120-150 °C wastes was mixed with fine sand and gravel aggregate as filler.

Evaluation of the Thermal Insulation Properties of Composites with ZrO/Al Coatings Intended for the Construction of Protective Gloves.

The article presents research on the evaluation of the use of two four-layer textile composites with ZrO/Al coatings of different thicknesses (deposited by magnetron sputtering PVD) with potential use in thermally insulating protective gloves designed for steelworkers, welders, or miners. The structure of the composites was analyzed using high-resolution X-ray micro-CT. The assessment of the safety of the glove user was conducted using methods in which the composites were exposed to contact heat, radiant heat, and flame heat.

Determination of the Critical Voltage for the Observation of Uncoated Wood Samples in Electron Microscopy.

Electron microscopy (EM) is a key tool for studying the microstructure of wood; however, observing uncoated samples poses a challenge due to surface charging. This study aims to identify the critical voltage that allows for the effective observation of uncoated wood samples without significant loading. As part of the experiment, samples of different wood species were tested, including Acacia ( L.

The Influence of Terfenol-D Content on the Structure and Properties of Multiferroic Composites Obtained Based on PZT-Type Material and Terfenol-D.

In this work, three composite materials based on Terfenol-D and PZT-type material were obtained with a classic sintering method using a combination of 0-3 phases, where the ferroelectric phase was doped PZT material (P) and the magnetic phase was Terfenol-D (T). The percentage of P and T components in the composites was variable, i.e.

Accelerated Method for Determining the Fatigue Limit of Trabecular Bone.

This paper presents an experimental method for estimating the fatigue limit of trabecular bone using a single trabecular bone sample, the microstructural parameters of which were determined by microCT. Fatigue tests were carried out using the Locati method, with stepwise increasing load amplitude. The fatigue limits of the trabecular structures were determined experimentally in accordance with Miner's law of fatigue damage accumulation, based on the parameters of the reference S-N curve taken from the literature.

Effects of Thickness of the Corn Seed Coat on the Strength of Processed Biological Materials.

The strength and energy of processed biological materials depend, among others, on their properties. Despite the numerous studies available, the relationship between the internal structure of corn grains and their mechanical properties has not yet been explained. Hence, the aim of the work is to explore the relationship between the internal composition of maize kernels and its mechanical properties by studying the impact of the maize seed coat thickness on its breakage susceptibility.

Comparison of Pheromone Lures and Sticky Pad Color for Capturing (Lepidoptera: Gelechiidae).

Tomato leaf miner (Meyrick) (Lepidoptera: Gelechiidae) has gained the status of major pest globally. Integrated pest management (IPM) consists of different control methods. This field study was conducted to evaluate the influence of different pheromone-based traps to attract the male population and the potential of sticky pads of four different colors in capturing the adults in the absence of pheromone lures.

n. sp.-The First Record of Species with a 2-Segmented Club of Antennae in the Oriental Region (Bostrichidae, Lyctinae: Trogoxylini).

The paper presents a description of a new species of the genus Lesne, caught in northern Thailand. The new species, Borowski n. sp.

Assessment of Different Conventional and Biofortified Wheat Genotypes Based on Biology and Damage Pattern of and .

The lesser grain borer, (F.) (Coleoptera: Bostrichidae) and khapra beetle, E. (Coleoptera: Dermestidae) are primary stored-grain insect pests.

Evaluation of the Sterile Insect Technique for the Control of the Melon Fly () Under Laboratory and Semi-Field Conditions in Sri Lanka.

The melon fly, , poses a severe threat to the country's agricultural productivity, particularly in the cultivation of cucurbitaceous crops. This study was conducted to determine the ideal irradiation dose to be used to set up a Sterile Insect Technique (SIT)-based strategy to control outbreaks in Sri Lanka. A colony was established and maintained under standard laboratory conditions.

Temperature-Related Bioclimatic Variables Play a Greater Role in the Spatial Distribution of Bumblebee Species in Northern Pakistan.

Bumblebee species are vital wild pollinators, providing essential pollination services for various crops, fruits, and vegetables. However, their biodiversity is vulnerable to decline due to climate change, particularly in regions like northern Pakistan. Despite this, no research has yet been conducted on the distribution patterns of bumblebee species in this region.