Determination of mechanical properties of metal of welded joints by strength parameters in the stress concentration zones detected by the metal magnetic memory method

被引：28
作者：
Kolokolnikov, S. M. [1 ]
Dubov, Al. A. [1 ]
Marchenkov, A. Yu. [2 ]
机构：
[1] Energodiagnost Co Ltd, Moscow, Russia
[2] Russian Natl Res Univ, Moscow Power Engn Inst, Moscow, Russia
来源：
WELDING IN THE WORLD | 2014年 / 58卷 / 05期
关键词：
Hardness; Mechanical properties; Nondestructive testing; Residual stresses; Strain;
D O I：
10.1007/s40194-014-0151-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The magnetic memory of metal (MMM) is an aftereffect, which occurs in the form of metal residual magnetization in components and welded joints formed in the course of their fabrication and cooling in the weak magnetic field of the earth and in the form of irreversible change of components' magnetization in zones of stress concentration and damage under working loads (ISO 24497-1: 2007(E)). Experience with carrying out comprehensive testing of welding specimens by the MMM method with subsequent stress concentration zones (SCZs) detection and determination of the mechanical properties by hardness characteristics is described. It is shown that the microhardness and consequent mechanical properties in the SCZs considerably exceed the average level of above characteristics.
引用
收藏
页码：699 / 706
页数：8
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