Research of Fatigue Fracture on Fillet Welded Joints Made of FV520B

The fatigue parameters of welded joints made of FV520B were obtained considering the real operating situations. The fatigue fracture types were divided into two groups. The scanning electron microscope (SEM) was applied to carefully study the fatigue fracture surfaces so as to investigate the fatigu...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 121-126; pp. 559 - 563
Main Authors Wu, Cheng Wei, Zhao, Yan Guang, Fan, Jun Ling, Guo, Xing Lin, Deng, De Wei
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.01.2012
Subjects
FV520B
Fatigue Fracture
Fillet Welded Joint
Microstructure
Fatigue Parameter
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Summary:The fatigue parameters of welded joints made of FV520B were obtained considering the real operating situations. The fatigue fracture types were divided into two groups. The scanning electron microscope (SEM) was applied to carefully study the fatigue fracture surfaces so as to investigate the fatigue failure mechanisms. The microstructures of the base metal and the weld seam were studied by the metallographic microscope (MM), SEM and TEM in support of the dissimilar mechanical property analysis. The present paper concluded that the fatigue microcracks mainly initiated from the surface near the weld toe and inclusions in the weld seam, the heat-affected zone (HAZ) disappeared due to the postweld heat-treatment processes, and that the fatigue resistance of the base metal was better than the weld seam.
Bibliography:Selected, peer reviewed papers from the Second International Conference on Frontiers of Manufacturing and Design Science, (ICFMD 2011), December 11-13, Taiwan
ISBN:3037852828
9783037852828
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.121-126.559