Some Mechanical Characteristics of Structural Steels of Cooling Systems of Continuous Operation

被引：1
作者：
Boiko, A., V [1 ]
Makarenko, V. D. [2 ]
Maksymov, S. Yu [3 ]
机构：
[1] Natl Univ Life & Environm Sci Ukraine, Kiev, Ukraine
[2] Natl Univ Yuri Kondratyuk Poltava Polytech, Poltava, Ukraine
[3] Natl Acad Sci Ukraine, Paton Elect Welding Inst, Kiev, Ukraine
来源：
STRENGTH OF MATERIALS | 2021年 / 53卷 / 02期
关键词：
mechanical characteristics; structural steel; strength; brittle strength; crack resistance; low temperatures; corrosion; flooding; EMBRITTLEMENT; HYDROGEN; SULFIDE;
D O I：
10.1007/s11223-021-00285-z
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The results of experimental research of low temperatures influence on mechanical characteristics of structural steels of long-term operation in chemically aggressive environments of cooling systems are presented. It is shown that such characteristics of pipe steel as impact toughness (according to Charpy), critical coefficient of stress intensity (fracture toughness), critical crack opening, and microscopic resistance significantly decrease when temperature changes from 20 to -50 degrees C, which indicates a significant decrease in crack resistance of the material. It has been established that the indices of ductile-plastic properties - yield strength, relative longitudinal and transverse deformations decrease sharply in the process of prolonged (up to 30 years) operation of pipe steel. At the same time, intensive flooding of metal takes place.
引用
收藏
页码：272 / 276
页数：5
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