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標題: Characterization and mechanism of 304 stainless steel vibration welding
作者: Kuo, C.W.
Lin, C.M.
Lai, G.H.
Chen, Y.C.
Chang, Y.T.
Wu, W.
關鍵字: vibration welding;delta-ferrite;X-ray diffraction;residual stress;grain refining;stress relief;solidification
Project: Materials Transactions
期刊/報告no:: Materials Transactions, Volume 48, Issue 9, Page(s) 2319-2323.
Gas tungsten arc welding (GTAW) was performed on AISI 304 stainless steel; steady-state vibration was produced by a mass-eccentric motor. The vibration weld shows a very small delta-ferrite structure, uniform composition distribution, less residual stress and less delta-ferrite content relative to the weld without vibration. The results illustrate that the vibration reduces the micro supercooling and improves the nucleation of delta-ferrite to form a grain refined structure. Vibration-induced stacking faults are identified as the major cause of the line broadening of X-ray diffraction profile. Correlating the literature and the result in the study, the mechanism of vibratory stress relief can be represented as the breakdown of dislocation into a pair of partial dislocations. This mechanism can comprehensively explain all the phenomena that take place during vibratory stress relief.
ISSN: 1345-9678
DOI: 10.2320/matertrans.MB200706
Appears in Collections:材料科學與工程學系

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