Nuclear-physical methods of determination of the concentration and distribution of lithium in welded joints of alloys of the Al-Li system

摘要

When examining the weldability of alloys of the Al-Li system, it is necessary to know the concentration and the distribution of lithium in the parent metal, the heat affected zone (HAZ) and welded joint~(1,2) and, in a number of cases, in the welded joints after heat treatment. In the production conditions, the total lithium content is determined by chemical or spectral analysis. However, these methods do not always make it possible to obtain reliable data.At present, more accurate methods of determination of the concentration and the distribution of lithium in alloys of the al-Li system are (n, #alpha#)-radiography and (p, #alpha#)-microanalysis.~(3,4)