INFLUENCE OF HYDROGEN ON THE FRACTURE RESISTANCE OF 65G SHEET STEEL

被引：5
|
作者：
Ivanyts'kyi, Ya. L. [1 ]
Shtayura, S. T. [1 ]
Mol'kov, Yu. V. [1 ]
Lenkovs'kyi, T. M. [1 ]
机构：
[1] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine
来源：
MATERIALS SCIENCE | 2012年 / 47卷 / 04期
关键词：
carbon spring steel; influence of hydrogen; plastic deformation; crack tip; layers of rolling; distribution of strains; topography of the surface in the process zone; stress intensity factor; fracture surface; morphology of crack propagation;
D O I：
10.1007/s11003-012-9416-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present the results of investigations of the influence of hydrogen on the fracture of 65G sheet spring steel. The distribution of strains is determined by the method of digital speckle correlation, the topography of the specimen surface in front of the crack tip is analyzed, and it is shown that the influence of hydrogen makes the fracture strain 1.5 times lower. It is also demonstrated that the crack resistance of 65G steel decreases in hydrogen (as compared with air) by 14%. The fractographic analysis of the fracture surfaces of specimens is performed and the morphology of crack propagation is investigated by the metallographic method. It is shown that the decrease in the operating characteristics of 65G steel under the action of hydrogen manifests itself in the localization of plastic strains and extensive delamination along the joints of the layers of rolling.
引用
收藏
页码：457 / 461
页数：5
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