In this paper a novel technique for the determination of weld pool temperature is presented. It is demonstrated that the relative rates of vaporization of any two elements from the molten pool can serve as an indicator of weld pool temperature. Alloying element vaporization rates, composition of the vaporized material and the weld pool temperature were determined for various experimental conditions during laser welding of AISI 202 stainless steel. Both the vaporization rate and the weld pool temperature were found to increase with the increase in laser power. The vaporized material consisted primarily of iron, manganese and chromium. The composition of the solidified region calculated from the measured values of vaporization rate, plasma composition and the volume of the solidified region was in good agreement with the weld composition determined by electron probe microanalysis.
|Original language||English (US)|
|Title of host publication||Unknown Host Publication Title|
|Publisher||Metallurgical Soc of AIME|
|Number of pages||11|
|State||Published - Dec 1 1985|
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