The Morphology of Defects of a Weld Joints of a Drum with a Steam-Generator Housing of VVER-1000 Generator Units

被引：0
|
作者：
Korneev, A. E. [1 ]
Lovchev, V. N. [2 ]
Kharina, I. L. [1 ]
Gutsev, D. F. [2 ]
机构：
[1] NPO Cent Sci Res Inst Machine Bldg Technol, Moscow 115088, Russia
[2] Rosenergoatom, Moscow 109507, Russia
来源：
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2017年 / 53卷 / 07期
关键词：
weld joint; crack; morphology; stress corrosion cracking;
D O I：
10.1134/S2070205117070103
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Results of an investigation of the morphology of cracks that form during the operation in the weld joint of a heat-carrier drum with the steam-generator housing of nuclear-power plant with a VVER-1000 unit are given. The reasons for the formation of cracks are the compound-stress state of weld units, the corrosive effect of the heat carrier, and the operating temperature. Crack formation proceeds according to the delayed stress corrosion cracking on the internal surface of metal upon contact with the corrosion medium. The features of crack formation and propagation mechanism should be considered during remedial measures that are aimed at the maintenance of the reliability of the weld joint of a drum with the steam-generator housing of VVER-1000 units.
引用
收藏
页码：1235 / 1239
页数：5
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