Mechanical Properties of 18Mn-5Cr Austenitic Steel at Cryogenic Temperatures

1983 ◽  
pp. 287-293 ◽  
Author(s):  
R. Miura ◽  
K. Ohnishi ◽  
H. Nakajima ◽  
Y. Takahashi ◽  
K. Yoshida
Keyword(s):  
Mechanical Properties ◽  
Austenitic Steel ◽  
Cryogenic Temperatures

Structure, Phase Composition, and Mechanical Properties of a Boron-Containing High-Nitrogen Austenitic Steel Made by Induction Melting

2020 ◽  
Vol 2020 (12) ◽  
pp. 1439-1445
Author(s):  
I. O. Bannykh ◽  
O. A. Bannykh ◽  
L. G. Rigina ◽  
E. N. Blinova ◽  
K. Yu. Demin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Austenitic Steel ◽  
Induction Melting ◽  
High Nitrogen ◽  
Structure Phase

The Effect of Aging Heat Treatment on the Microstructure and Mechanical Properties of 10Cr20Ni25Mo1.5NbN Austenitic Steel

2016 ◽  
Vol 35 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Zhiyuan Liang ◽  
Wanhua Sha ◽  
Qinxin Zhao ◽  
Chongbin Wang ◽  
Jianyong Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Heat Treatment ◽  
Austenitic Steel ◽  
Treatment Time ◽  
Aging Treatment ◽  
Secondary Phases ◽  
Aging Heat Treatment ◽  
Microstructure And Mechanical Properties ◽  
The Impact

AbstractThe effect of aging heat treatment on the microstructure and mechanical properties of 10Cr20Ni25Mo1.5NbN austenitic steel was investigated in this article. The microstructure was characterized by scanning electron microscopy, energy dispersive spectrometry and transmission electron microscopy. Results show that the microstructure of 10Cr20Ni25Mo1.5NbN austenitic is composed of austenite. This steel was strengthened by precipitates of secondary phases that were mainly M23C6 carbides and NbCrN nitrides. As aging treatment time increased, the tensile strength first rose (0–3,000 h) and then fell (3,000–5,000 h) due to the decrease of high density of dislocations. The impact absorbed energy decreased sharply, causing the sulfides to precipitate at the grain boundary. Therefore, the content of sulfur should be strictly controlled in the steelmaking process.

Effect of hydrogenation on mechanical properties and tensile fracture mechanism of a high-nitrogen austenitic steel

2016 ◽  
Vol 52 (8) ◽  
pp. 4224-4233 ◽  
Author(s):  
Elena G. Astafurova ◽  
Valentina A. Moskvina ◽  
Galina G. Maier ◽  
Eugene V. Melnikov ◽  
Gennady N. Zakharov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Austenitic Steel ◽  
Fracture Mechanism ◽  
Tensile Fracture ◽  
High Nitrogen

scholarly journals HERMETIZATION OF VALVE SEALS FOR CRYOGENIC FLUIDS

2020 ◽  
Vol 6 (2) ◽  
pp. 12-19
Author(s):  
Yuri I. Kondrashov ◽  
Elena N. Ermilova ◽  
Anna N. Vidyaskina
Keyword(s):  
Mechanical Properties ◽  
Contact Pressure ◽  
Phase State ◽  
Working Fluid ◽  
Cryogenic Temperatures ◽  
Two Phase ◽  
Plastic Properties ◽  
Cryogenic Fluids ◽  
Specific Contact ◽  
Flow Through

For units providing flow control for cryogenic fluids and operating under conditions of a significant change in the temperature range from positive to cryogenic and in a two-phase state of the working fluid, the problem of sealing the closure members of the units (valve pairs) becomes urgent.Joint sealing is ensured by creating contact pressure in the joint through deforming the roughness peaks obtained by surface treatment of the valve pair.The mechanical properties of the materials of the contacting valve pairs change significantly under the influence of cryogenic temperatures. First of all, the plastic properties are reduced, therefore, the creation of increased contact pressure is required.The article presents a methodology for evaluation of changes in the microgeometry of contacting surfaces depending on the specific contact pressure. It also allows one to evaluate the conductivity of microgaps in the viscous and molecular regimes of fluid flow through contacting surfaces.

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