Requirements of materials

Nickel normally crystallises in the f.c.c. structure it undergoes a magnetic transformation at 357°C and is ferromagnetic below that temperature. In all the alloys shown in Table 4.21 the f.c.c. (austenitic) structure is substantially retained, and in consequence most of the alloys possess the combination of properties required of materials for widespread industrial acceptability, i.e. tensile strength, ductility, impact strength, hardness, hot and cold workability, machinability and fabrication. 

Thus, the rheological requirements of materials for this application are demanding, and their evaluation has been important in the study of this group of AB cements. 

David Hull. The only part of your analysis that bothers me is the requirement of material overlap, but then I m not an immunologist. Is there an immunologist in the house Does the immune system fulfil the material overlap requirement ... 

Alex Rosenberg Does photocopying not satisfy your requirement of material overlap ... 

Perhaps the biggest thrust for the development of high performance polymers over the next 10 years will be in the aerospace industry where materials will be required for a fleet of high speed civil transports (supersonic transports). At a speed of Mach 2.4, an aircraft surface temperature of about 150 to 180°C will be generated. The life requirement of materials at these temperatures will be about 60000 hours. Many different types of materials such as adhesives, composite matrices, fuel tank sealants, finishes and windows will be needed. These materials must exhibit a favorable combination of processability, performance and price. The potential market for these materials total several billions of US dollars. 

Requirement of materials for various components in different industries... 

The second issue is the basic knowledge of material selection. What do we mean by material selection Material selection basically means the meeting of the main requirements of materials for a particular facility/component or utility. The following are the main requirements of material selection at room temperature ... 

Network Requirements Planning The network requirements planning should reduce the coordination efforts of the demand-based disciplines demand assessment and make or buy analysis by determining the type, quantity, and time of products to be produced. For that purpose, the requirements of material and components resulting from the sales plan need to be determined and distributed to the partners of the network to assure the fulfilment of demand. The fulfilment of demand is based on the subtasks network capacity planning, network demand allocation, and network procurement planning. 

Thus, these expanded clays have the thermal stability required of materials used in the preparation of catalysts for certain hydrocarbon conversion reactions, such as hydrodesulfurization, hydrodenitrogenation, hydrodemetallation, and the hydrocracking of oil fractions. 

M.B. Peterson and J.F. Murray, Requirements of Materials for Sliding and Rolling Contacts, Boundary Lubrication, American Society of Mechanical Engineers, 1969, Chapter 9. 

The specific requirements of materials for conservation must be determined for... 

Materials used to make nozzles. The main features required of materials used for nozzles are a high level of mechanical strength and a high thermal conductivity (Figure 4.4), and in some applications they must also he highly ahrasion-resistant and have special resistance to chemicals. 

The properties required of materials for equipment housings include most importantly, surface finish, impact strength, low flammability and low cost. 

Materials Requirement Planning — a concept developed in the 1970s to make use of high-speed computers to model the requirements of material for a manufacturing operation. Chapter 22... 

The tendency in post-disaster situations is often to revise building codes and standards in order to enhance the resilience of stmctures to future disasters. However, this regulatory change induces the changes to the requirement of materials, skills, tools, and techniques in new constmction. New materials and skills may not be available in the time of reconstmction as it requires a considerable time for manufacturers to undertake the research and development, to test and release these new materials onto the market. The additional costs of the new constmction requirements are often not well reflected in the regulatory impact statement due to uncertainties and the real-time nature of disaster events. 

A surface modifying CVD coating technology, taking into account the specific requirements of material heat treatment, has been successfully... 

---