Research Progress of Methods to Improve Fatigue Strength of Welded Structures

被引：2

作者：

Fang, Zongtao ^{[1
]}

机构：

[1] CNPC Res Inst Engn Technol, Tianjin 300451, Peoples R China

来源：

ADVANCED MATERIALS AND PROCESS TECHNOLOGY, PTS 1-3 | 2012年 / 217-219卷

关键词：

fatigue strength; improving measures; welded joint; stress concentration; residual stress;

D O I：

10.4028/www.scientific.net/AMM.217-219.1614

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fatigue fracture is the main failure form of welded structures. Fatigue strength of welded joints is far below that of base metal under the combined effect of stress concentration, molten slag defects in weld toe and residual tensile stress. Fatigue damage mechanism and main factors that affect fatigue strength of welded structures are analysis and summarized respectively. This paper emphasizes on introducing the research progress of various measures to improve the fatigue properties, including weld toe grinding, TIG dressing, local-heating and local extrusion method, hammering and shot blasting and ultrasonic peening treatment.

引用

页码：1614 / 1617

页数：4