Search Results for viscosity measurements

Researchers at the University of Akron have developed a high-resolution characterization system that incorporates six gel permeation chromatography columns, two light scattering detectors, a refractive index sensor, and a viscometer. The new system facilitates the study of separated macromolecules and is expected to play a role in the development of safer biopolymers for breast implants.

Metallic glasses are noncrystalline solid metals that have high strength, excellent corrosion resistance, and impressive hardness compared to their crystalline counterparts. A modern understanding of how glasses are formed along with an appreciation for the high ultimate yield strength of metallic glasses are leading to a boon in applications for these unique materials.

As scientists and engineers continue to develop and investigate replacement tissues for patient disease, injury, and aging, proper mechanical characterization of biological materials is critical. This article provides an overview of some static mechanical testing, creep testing, stress-relaxation testing, and fatigue testing methods for biomaterials applications.

Techniques for the 3D printing of ceramics are evolving beyond product development and prototypes to enable full production-scale operations. This article gives examples of available methods and tradeoffs that must be addressed in developing 3D printing systems for ceramics.

Thixoforming is a hybrid technology used to manufacture net shape components from a variety of alloys ranging from low melting temperature aluminum and magnesium to steel and Co-base alloys.

The absence of standards and a common vocabulary are an obstacle when it comes to evaluating the structure of thermal spray coatings. However, proper sectioning and mounting of metallographic specimens helps ensure that the images obtained accurately reflect the coating structure and the information that can be derived from it.

Flow measurement is an increasingly important part of quality control systems in the heat treating industry. This article discusses the most commonly used flow measurement instruments and compares their operating principles.

New methods evaluate steel hardenability in a standard gas quench test and heat transfer coefficient variation within a furnace gas quench chamber.

Flow measurement is an increasingly important part of quality control systems in the heat treating industry. This article covers selection basics, sizing, mass flowmeter overview, and frequently asked questions about about flowmeters.

A digital refractometer gives more accurate quench concentration readings thereby reducing maintenance, increasing productivity, and ensuring desired metallurgical properties.

This article explains why defining gas quenching in terms of bar pressure no longer applies and how a new definition based on heat transfer and cooling rate leads to a better understanding of which steels and what cross-sections can be hardened via gas quenching.

A new fusion cladding process that uses high-intensity arc lamps can produce pinhole free, smooth, uniform coatings as thick as 15 mm from various feedstock materials. This article briefly describes the process and the corrosion, wear, and high-temperature behavior of fusion claddings designed for oil and gas pipelines and related components.

Understanding both the origin and procedures for removing inclusions in magnesium alloys results in castings with enhanced mechanical and corrosion properties. This article provides an overview of typical inclusions found in magnesium and its alloys, various techniques used to determine inclusion content, and methods employed to reduce inclusions and their influence on properties.

This article reviews additive manufacturing technologies that can be used for manufacturing ceramics and ceramic-based composites. Stereolithography and associated techniques offer the possibility of producing ceramic components with finer resolution. Powder-based techniques like binder jetting and indirect selective laser sintering can be used for designing porous ceramics. Selective laser melting offers practitioners the option of manufacturing ceramics with minimal post-processing requirements, although further research is needed to decrease its cost.

From graphene to next-generation composites to 3D printing, advanced materials and processes are helping sportswear manufacturers, sporting goods companies, and sports medicine practitioners take their game to the next level. This special report reviews some of the most innovative technologies making an impact on today’s sports and recreation industry. Technologies addressed include graphene used in sportswear, new production methods for carbon fiber composites, and 3D printed implants to address knee injuries.

The development of biocompatible resins and improvements in stereolithography are driving innovations in drug delivery, biosensing, diagnostic testing, and surgical devices and procedures.

The high heating and cooling rates of additive manufacturing make it a good fit for metallic glasses, whose high elasticity, strength, hardness, and corrosion resistance are used in high-performance applications such as aerospace, defense, and biomedical devices.

A look at how bifilms are created during casting may offer clues to eliminating cracks, tensile fracture, fatigue failure, pitting, and stress corrosion cracking failures.