Influence of Manufacturing Conditions on Fatigue Life of Welded Joints

被引：1

作者：

Madyira, D. M. ^{[1
]}

Kumba, T. ^{[1
]}

Kaymakci, A. ^{[1
]}

机构：

[1] Univ Johannesburg, Dept Mech Engn Sci, ZA-2006 Auckland Pk, South Africa

来源：

14TH GLOBAL CONFERENCE ON SUSTAINABLE MANUFACTURING, GCSM 2016 | 2017年 / 8卷

关键词：

Welded joints; Fatigue life; Critical stress;

D O I：

10.1016/j.promfg.2017.02.085

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper presents a study on the influence of manufacturing conditions on the fatigue life of welded joints of high strength steels P355NL-1 and P355NL-2. Welding conditions were varied by adjusting the welding parameters and component-welding positions for a range of railway bogie welded joints. Prepared joints were then assessed for cracks and porosity defects. It was observed that an increase in welding speed resulted in an increase in crack and pore sizes. The same applied to increase in welding angle. Identified crack sizes ranged from 0.2 to 2.6 mm. Impact of such defects on fatigue life was assessed by evaluating the residual fatigue life of the component using the Paris law for stress amplitude of 150 MPa. The fatigue life of the bogie was estimated to be 6.23 x 10(5) instead of the required 1 x 10(6) cycles. It was concluded that manufacturing conditions have a significant effect on fatigue life of high strength steel welded joints. Travel speed and welding angle are critical. (C) 2017 The Authors. Published by Elsevier B.V.

引用

页码：665 / 672

页数：8

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