Experimental Study of Cyclic Creep and High-Cycle Fatigue of Welded Joints of St3 Steel by the DIC Technique

被引：0
|
作者：
Kibitkin, Vladimir V. [1 ]
Solodushkin, Andrey I. [1 ]
Pleshanov, Vasily S. [1 ]
机构：
[1] Inst Strength Phys & Mat Sci SB RAS, Tomsk 634055, Russia
来源：
INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2015 | 2015年 / 1683卷
关键词：
D O I：
10.1063/1.4932772
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the paper the mechanisms of plastic deformation and fracture of welded joints of steel St3 were investigated at high-cycle fatigue and cyclic creep by the digital image correlation (DIC) technique. The evolution of strain rate is studied for the following regions: base metal, HAZ, and fusion zone. This strain rate evolution can be considered as a mechanical response of material. Three stages of deformation evolution are shown: deformation hardening (I), fatigue crack initiation (II), and the last stage is related to main crack (III). Two criteria are offered to evaluate the current mechanical state of welded joints.
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页数：4
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