Vacuum apparatus for study of the creep and long-term-strength characteristics of materials at high temperatures

1975 ◽  
Vol 7 (6) ◽  
pp. 769-772
Author(s):  
G. S. Pisarenko ◽  
E. E. Zelenyuk ◽  
V. V. Krivenyuk
Keyword(s):  
High Temperatures ◽  
Strength Characteristics ◽  
Term Strength ◽  
Vacuum Apparatus

Effect of alloying with nitrogen on the long-term strength characteristics of welded joints in molybdenum-based alloys

1983 ◽  
Vol 15 (10) ◽  
pp. 1476-1481
Author(s):  
I. S. Tsvilyuk ◽  
E. P. Polishchuk ◽  
A. N. Badaev ◽  
D. S. Avramenko
Keyword(s):  
Welded Joints ◽  
Strength Characteristics ◽  
Term Strength ◽  
Alloying With Nitrogen ◽  
Effect Of Alloying

PE-RT: A New Class of Polyethylene for Industrial Pipes

2006 ◽  
Author(s):  
Detlef Schramm
Keyword(s):  
Molecular Structure ◽  
High Temperature ◽  
High Temperatures ◽  
Power Plants ◽  
Cold Water ◽  
Industrial Applications ◽  
Pipe Production ◽  
Term Strength ◽  
Temperature Resistance

The development of a new family of PE materials with significantly improved processability and long term strength at high temperatures is discussed. These polymers form the basis for a new ISO class of polyethylene materials: PE-RT (Polyethylene of Raised Temperature resistance) for hot and cold water as well as industrial pipe applications. These materials have a unique molecular structure and crystalline microstructure, which provides excellent Long Term Hydrostatic Strength at high temperature without crosslinking the material. PE-RT type materials are successfully used in domestic hot and cold water piping systems for most applications. The easy processing and outstanding material properties made these resins also attractive for use in many industrial applications, where larger dimensions are required and regular Polyethylene cannot be used or has temperature limitations. They also compete against high end engineering plastics, offering significant cost savings. These materials provide significant process advantages to the converters, allowing high line speed pipe production and providing excellent flexibility and ease of installation for the application. A recently developed PE-RT type material offers still higher long-term strength at high temperature and further improved processability. This combination makes this resin particularly suitable for high temperature applications. An example of the latter is in larger diameter cooling water pipes in power plants. Pipes based on these materials can be connected via heat welding or by the use of mechanical fittings. Furthermore this material can be used in industrial applications, were traditional Polyethylene is limited by the temperature resistance and metallic materials suffer from corrosion. The excellent weldability of these materials provides various opportunities to connect also larger dimensions in industrial applications. Another example of this is the use in multi-layer structured oil pipelines on-shore and off-shore. This paper presents the material science and product design concepts that govern the high long-term hydrostatic strength at high temperatures. By controlling the molecular structure, the melt rheology and solid state properties can be influenced. This results in a unique balance of processability and hydrostatic strength. Further discussed are the product features and benefits of PE-RT materials. The paper shows examples of the application range for this type of products, using applications in the domestic pipes market as a reference study.

INVESTIGATION OF THE STRENGTH CHARACTERISTICS DISPERSION-STRENGTHENED METAL-CERAMIC COMPOSITE MATERIAL VKM22

2021 ◽  
pp. 30-38
Author(s):  
D.I. Pevchev ◽  
◽  
M.A. Gorbovets ◽  
P.V. Ryzhkov ◽  
E.I. Kurbatkina ◽  
...  
Keyword(s):  
Metal Matrix ◽  
Ceramic Composite ◽  
Strength Characteristics ◽  
Matrix Composites ◽  
Term Strength ◽  
Reliable Operation ◽  
Short Term ◽  
Metal Ceramic ◽  
Increased Strength

In many industries, such as mechanical engineering and aerospace, traditional alloys are being replaced by metal matrix composites (MCM). Compared to unreinforced alloys, MCM is characterized by increased strength and rigidity combined with low density. To calculate the resource of nodes for the safe and reliable operation of new equipment, it is necessary to have a set of calculated values of the MCM strength characteristics, including the characteristics of short-term and long-term strength, low-cycle (LCF) and high-cycle (HCF) fatigue. The work is devoted to the study of the characteristics of short-term and long-term strength, LCF and MCF fatigue of dispersion-strengthened MKM grade VKM22.

Creep and long-term strength of niobium alloy VN-2 at high temperatures

1970 ◽  
Vol 2 (3) ◽  
pp. 235-238
Author(s):  
V. V. Krivenyuk ◽  
I. V. Makovetskii
Keyword(s):  
High Temperatures ◽  
Niobium Alloy ◽  
Term Strength
Sign in / Sign up

Export Citation Format

Share Document