Study on Solidification of Aluminum Alloy Weld Metal (Report 1) : Experiments on High Pure Al Thin Plate

概要

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At present, it is very difficult to make clear solidification process of weld metal, because it includes various problems which are difficult to solve theoretically and experimentally. This experiment, as a fundamental stage to make clear the solidification process, was performed on high pare Al, in which solidification process is comparatively simple, by TIG arc spot welding, which needs no filler metal Measurement of temperature was carefully carried out using a very slender thermocouple, and also dynamic observation of solid-liquid interface in whole solidification process was performed using a high speed camera. The experimental results were analized about the following points such as behavior of solid-liquid interface, solidification rate, temperature distribution, cooling rate, temperature gradient, undercooling, and the relation between points mentioned above and welding conditions. The analysis shows that the transitional measurements are considerably different from calculated values based on theory of heat conduction, because they are based on mean value in solidification process.
社団法人溶接学会の論文
1985-10-01