#mechanical strength

[heanjiaalloys]

Corrosion resistance performance of Hastelloy C276 in supercritical water reactor

The supercritical water coolant reactor is a type of generator catching more and more attention in the recent years for its high thermal efficiency and simple structure. The corrosion properties of the structural material used in these reactors with thin wall kept in touch of supercritical water limited its application. Considering the supreme mechanical properties and corrosion performance in the high temperatures, nickel base alloys are found to be suitable material use in supercritical water reactors. Essentially, nickel base alloys contain high concentration of nickel, chromium that could increase the oxidation and corrosion resistance of the nickel base alloys at high temperatures.

High mechanical strength and supremely tough Hastelloy C276 is used in high temperature applications. Additionally, it is found to have an outstanding high temperature corrosion resistance. Hastelloy C276 plate was cut into samples that were then mechanically polished and washed by ultrasound with acetone. After each exposure circle the samples were brought out for oxide scale characterization. Corrosion studies were performed at 500oC at pressure 25 MPa for time durations of 500 hour.

Results

After 50 hour exposure, a thick layer of oxide film is noticed on the surface. The granular oxide particles are also found dispersed on the alloy surface. The magnitude of oxide particles increased with increase in exposure durations. After 500 hours, nominal cracks are found on the surface of oxide layer. The composition of the oxide film and particles after 500 hour exposure is evaluated. It is noticed that the oxide layer developed on the alloy C276 surface is made of Nickel, iron, chromium, molybdenum and oxygen. Composition of the oxide layer remains stable with increase in immersion time.

The phase composition of the oxide layer developed on the sample subjected to SCW at 500oC and 25MPa for 500 hour was determined by X ray diffraction. It is found that the oxide layer is mainly made from NiO, Cr2O3, NiCr2O4 and MoO2. Although the diffraction intensity peaks of MoO2 are considerably decreased, showing the low concentration of which occurred in the oxide layer. Nickel and molybdenum are the base of alloy C276. The development of Cr2O3 in the oxide layer can prevent  the ion transfer and significantly decrease the oxide reaction, hence reducing the growth rate of the oxide layer. The diffusion coefficient of the metal ions in spinal NiCr2O4 is certainly smaller than that in its own oxide and the presence of Ni2Cr2O4 is also helpful to enhance the corrosion resistance of alloy.

The cross section of Hastelloy C276 subjected to reactor water for 500 hour observed. The oxide layer developed is a dual layer structure and no crack is found between the inner and outer oxide layers. The outer layer is slightly thicker than the inner layer. The outer layer of the oxide layer is mainly Nickel rich and the inner layer is enriched of chromium.

The corrosion resistance of Hastelloy C276 is mainly associated to the properties of the oxide layer developed on its surface. The corrosion rate of Hastelloy C276 is quick and nickel and chromium are oxidized at the same time developing NiO and Cr2O3.

[msdpvc]

Expert guide on inflatable boat fabric GSM, tensile strength, and welding compatibility. Learn how Zhejiang MSD engineers materials for dura

Engineering The Perfect Inflatable Boat Fabric: Balancing GSM, Mechanical Strength, And Welding Compatibility

[sean97ww]

Exploring Nanofiller-Enhanced TPU Films for Tougher Materials

Thermoplastic polyurethane (TPU) has long been recognized for its flexibility, toughness, and resistance to abrasion. However, its performance can be significantly enhanced by adding nanofillers to the TPU matrix, creating what is known as TPU Compound Film. The addition of nanofillers, such as carbon nanotubes (CNTs), graphene, and nanoparticles of metals or ceramics, leads to a variety of improvements in both the mechanical and functional properties of the material. These enhancements make TPU Compound Films suitable for more demanding applications across multiple industries, including automotive, packaging, and electronics.

The mechanical properties of TPU are one of its strongest features, but they can be even further improved with the incorporation of nanofillers. When nanoparticles are added to the TPU matrix, they create a network of interactions within the material. This increases the load-bearing capacity and overall tensile strength of the film, making it more resistant to deformation under stress. For applications in industries like automotive manufacturing, where durability and high performance are crucial, TPU films reinforced with nanofillers offer a distinct advantage over traditional TPU films. The increased strength and flexibility make them ideal for components that need to endure harsh conditions, such as gaskets, seals, and protective coatings.

One of the most notable enhancements to TPU Compound Films with nanofillers is the improved thermal stability. Nanofillers, such as graphene and CNTs, have exceptional heat resistance, and when integrated into TPU films, they help to create a material capable of withstanding high temperatures without losing its mechanical properties. For example, TPU films used in the aerospace and electronics industries require materials that can handle high thermal exposure without becoming brittle or deformed. The addition of nanofillers ensures that TPU films can perform under such conditions, maintaining their integrity even in extreme environments.

In addition to mechanical and thermal properties, nanofillers can also improve the barrier properties of TPU films. Nanocomposites have been shown to provide superior resistance to moisture, gases, and UV radiation. This is a valuable quality for films used in packaging, as it can extend the shelf life of sensitive products by protecting them from environmental factors. Furthermore, the UV resistance of TPU films reinforced with nanofillers makes them well-suited for outdoor applications, such as protective coatings for solar panels, outdoor equipment, and automotive parts.

Beyond these advantages, the addition of nanofillers can also lead to significant improvements in the electrical conductivity of TPU films. This characteristic is particularly important for applications in the electronics sector, where conductive materials are needed for flexible displays, touch panels, and sensors. Nanofillers, such as silver nanoparticles or conductive polymers, can be incorporated into TPU films to create a material that is not only flexible and durable but also capable of conducting electricity. This opens up new possibilities for the development of next-generation flexible electronics and wearable technologies.

The incorporation of nanofillers into TPU Compound Films also supports sustainable practices in manufacturing. With growing concerns about environmental impact, industries are increasingly seeking materials that are both high-performance and environmentally friendly. TPU films enhanced with biodegradable or recyclable nanofillers provide a solution to this challenge. The ability to create high-performance materials that are also sustainable is a significant step toward reducing the environmental footprint of manufacturing processes.

Shanghai MSD International Trading Co., Ltd. has recognized the potential of nanofiller-enhanced TPU Compound Films and their ability to meet the evolving needs of industries requiring high-performance, durable, and sustainable materials. By offering TPU films that leverage the latest advances in nanotechnology, Shanghai MSD is helping to drive innovation in material science and provide superior solutions for a wide range of applications.For more information on the industrial applications and benefits of TPU Compound Films, visit https://www.shanghaimsd.com/news/growing-industrial-use-of-tpu-compound-film-highlights-material-s-versatility.html .

[cylexplastics]

PTFE Filled Modified Materials: The Key to Enhancing Wear Resistance and Mechanical Strength

In the world of advanced polymer materials, PTFE (Polytetrafluoroethylene) stands out for its exceptional properties. However, when enhanced with filler materials, PTFE transforms into an even more remarkable engineering solution. This article explores how PTFE filled modified materials significantly improve wear resistance and mechanical strength for demanding industrial…

PTFE Filled Modified Materials: The Key to Enhancing Wear Resistance and Mechanical Strength

[cylexplastics]

Explore PVDF: A versatile thermoplastic fluoropolymer

In the vast universe of materials science, polyvinylidene fluoride (PVDF) is like a shining star, attracting the attention of countless researchers and engineers with its excellent performance and wide application fields. As a high-performance thermoplastic fluoropolymer, PVDF not only has excellent physical and chemical properties, but also plays a pivotal role in many industries. Today, let us…

Explore PVDF: A versatile thermoplastic fluoropolymer

[crimsonpublishers]

Preparation and Relative Mechanical Strength of Erbium Monoselenide Films_Crimson Publishers

Preparation and Relative Mechanical Strength of Erbium Monoselenide Films by Jabua Z* in Crimson Publishers: Peer Reviewed Material Science Journals 

Compounds of rare-earth elements with elements of the sixth group of the chemical elements’ periodic table have an interesting electrophysical, optical and other properties [1,2], but their mechanical properties have not been studied. Recently, massive attention has been drawn to the mechanical properties of films since films with interesting electrical properties often exhibit low mechanical strength, which limits their practical application. The aim of the present work has been developing a technology for preparing thin ErSe crystal films on different substrates by vacuumthermal evaporation from two independent sources of erbium and selenium, and by the method of discrete vacuum-thermal evaporation, pre-synthesized ErSe compound and to study their relative mechanical strength using the full erasure method.

For more Open access journals in Crimson Publishers please click on below link https://crimsonpublishersresearch.com/

For more article in Peer Reviewed Material Science Journals please click on below link https://crimsonpublishers.com/rdms/

[heanjiaalloys]

Sintered mesh screens for durable and consistent performance

Sintered mesh products are usually made of stainless steel in single layer, double layer and multi-layers. These screens are commonly used in water treatment, gas purification and solid particle separation. Sintered mesh screens offer the various features including:

High strength and precision

Extensive filter rating options for selection

Easy to weld, shear

Durable and corrosion resistant

Applications of sintered mesh screens:

1.       Water treatment and gas filtration

2.       Screening of highly viscous liquids

3.       Air flow distribution control

4.       Separation and recovery of solid particle

5.       Transpiration cooling at high temperature

6.       Controlled noise

Sintered perforated mesh

Sintered perforated mesh is made of diverse layers of stainless steel wire meshes and one perforated metal layer. Common sintered perforated mesh includes: perforated layer, fine mesh layer, security layer and filter layer and perforated metal as strengthening layer supports the filter structure. Characteristics include high mechanical strength and filtration precision, sintered perforated mesh is commonly used in diverse industries where the particles should be filtered under very high pressure condition.

Advantages of sintered perforated mesh include : high strength, stability, high filtration precision, resistance to corrosion, potential to withstand high temperature, easy to produce and clean

Heanjia supplies sintered mesh screens in required specifications for use in filter cartridges. These screens are commonly made of stainless steel. They have high mechanical strength, pressure tolerance and filter cartridge has larger filtering surface than the standard type. These screens are corrosion resistance and easy to clean. Offering high durability and prolong service life, the sintered mesh screens are commonly used for liquid and gas filtration, chemical fiber filtration and water treatment plants.

You can also contact us to receive sintered fiber felt made of stainless steel by laminating, and high temperature sintering. As compared to woven wire mesh, sintered fiber felt offers superior filtration performance, as it has high porosity, outstanding permeability, dirt retaining capacity and filtering accuracy. With high strength and prolong life, the fiber felt is commonly used as sintered wire mesh product for a filtering layer. It can also be sintered with several other fiber felts to produce durable filter media.

Sintered mesh support a drainage mesh overlaid by the precisely woven filtration mesh which is then secured from mechanical damage by further layer. This act as a surface filtration medium. Particles are trapped on the outer layer, making cleaning through jetting or backflushing supreme.

Sintered mesh offers high mechanical strength and it is easy to cut, roll and machine. The sintering process bonds each wire to its surroundings, preventing the chance of wire movement in critical applications. The open structure offers significantly lower pressure drops than general mesh screens. Heanjia also offers special range of mesh screens made from nickel base super alloys such as Hastelloy.

Designed to cost and purpose, coating demands an in-depth approach that goes far beyond the selection of a material based simply on chemical composition and particle size distribution.

[heanjiaalloys]

Nickel super alloys Inconel grades for high temperature processing

Hot processing should be performed in the temperature range specified by manufacturers. Similar to austenitic steels, heat resistant steels can be produced in cold form. Although, because of their considerably high nitrogen concentration, the mechanical strength of specific steels is higher and wider deformation forces are hence needed. The high hardness of austenitic steels and their potential to strain harden should be considering during machining.

These steel grades provide suitable welding potential and can be welded by using the various methods such as shielded metal arc welding with covered electrodes, gas shielded welding, such as gas tungsten arc welding, plasma arc welding and gas metal arc welding by using pure argon as a shielding gas and submerged arc welding.

Heat processing after hot or cold processing or welding is usually not required if the material is subjected to high temperature during service. Although,  if that is not adequate, the suitable option is solution annealing for austenitic stainless steels and soft annealing for ferritic stainless steels.

Time based deformation and fracture of structural materials at the elevated temperatures are one of the challenging issues faced by material producers. To create an enhanced design method for machines and systems serving at high temperatures, various factors should be considered such as:

·         Plastic instability at elevated temperatures

·         Deformation methods and strain components related with creep processes

·         Dependence on stress and temperature

·         High temperature fracture

·         Environmental effects

Engineering factors for the life management of service components considering that the material is significantly degraded or damaged with increase in creep strain and service time accumulates. Although, for the objective of component- life improvement which enables decisions to be made depending on part replacement repair or renovation, there is an essential need to magnify the accumulation of damage due to service conditions. There are two basic concepts used for damage evaluation of the service component.

·         Remaining life is evaluated from the known specific properties of the production materials, depending on the complete knowledge of the service conditions, such as temperature and stress changes

·         Life estimates are made by using post-exposure measurements of micro-structural variations, intergranular cavitation or mechanical properties like hardness, impact or stress-rupture life.

Alloys used for service at high temperature are Inconel wire grades depend on the production of a regular, compact, slowly growing oxide film for oxidation and hot corrosion resistance. To be secured, this oxide film should be chemically, thermodynamically and mechanically stable. Chosen alloy design for oxidizing conditions is best achieved for producing adherent layers of alumina, chromia or silica. Oxidation mechanisms are usually evaluated as weight changes however can be followed as variation in layer thickness. Regular weight change is often noticed by thermo-gravimetric evaluation. Weight change data gives a suitable evaluation of magnitude of metal transformed in oxide and a suitable comparison of alloys. Although the eventual engineering factor of the oxidation resistance provided by a material is retention of mechanical properties after exposing to service conditions. Information received from creep rupture tests should not be used for design objectives when the material is subjected to conditions of excessive oxidation.