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- W3189168420 abstract "An investigation into the heat sink effects due to weldment irregularities and fixtures used in the variable polarity plasma arc (VPPA) process was conducted. A basic two-dimensional model was created to represent the net heat sink effect of surplus material using Duhamel's theorem to superpose the effects of an infinite number of line heat sinks of variable strength. Parameters were identified that influence the importance of heat sink effects. A characteristic length, proportional to the thermal diffusivity of the weldment material divided by the weld torch travel rate, correlated with heat sinking observations. Four tests were performed on 2219-T87 aluminum plates to which blocks of excess material were mounted in order to demonstrate heat sink effects. Although the basic model overpredicted these effects, it correctly indicated the trends shown in the experimental study and is judged worth further refinement." @default.
- W3189168420 created "2021-08-16" @default.
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- W3189168420 date "1989-12-01" @default.
- W3189168420 modified "2023-09-27" @default.
- W3189168420 title "Heat sink effects on weld bead: VPPA process" @default.
- W3189168420 hasPublicationYear "1989" @default.
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