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The Influence of Energy Focusing Effect on the Weld Defects

The present work researches influence of energy focusing effect to the fusion zone defects in the electron beam welding, which include fusion zone shape, welding depth, welding width, rippling and spiking. And to verify the model of welding defects base on theory and experiment. A spike is a sudden increase in penetration beyond what might be called the average penetration line. Many spikes have voids and cold shuts in their lower portions, because molten metal does not fill in completely, producing a condition similar to a cold shut in a casting. Ripples on a workpiece surface are generally associated with segregation, porosity and other microstructure defects. These become the objectives in this project.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0828108-174555
Date28 August 2008
CreatorsChuang, Kai-Cheng
ContributorsHan-Taw Chen, Feng-Kuang Chung, Fei-Bin Hsiao, Peng-Sheng Wei, Jiin-Yuh Jang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0828108-174555
Rightsnot_available, Copyright information available at source archive

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