Application of X-Ray Diffraction to Analyse Phase Composition of Aluminium Alloysfor Plastic Working

An attempt was made to determine phase composition of commercial aluminium alloys using X-ray diffraction.Samples for phase composition analysis were selected from the group of aluminium alloys covered by the EN 573-3:2013 standard [1].Representative samples were taken from eight groups of alloys with different chemical composition (at least one sample from each group).The diffraction intensity was measured with a standard X-ray diffractometer in Bragg-Brentano geometry in a way that allowed identification of the weakest diffraction peaks.As a results of the performed research it has been shown that X-ray phase analysis can be used to identify the matrix of aluminium alloys, Si and crystalline intermetallic phases such as Mg 2 Si, Al 93.38 Cu 6.02 Fe 24 Si 16.27 , Al 4.01 MnSi 0.74 , MgZn 2 , Al 17 (Fe 3.2 Mn 0.8 ) Si 2, Al 65 Cu 20 Fe 15 , and Cu 3 Mn 2 Al.The detectability limit of the above-mentioned phases is better than 0.5%.The research has also shown that X-ray phase analysis is applicable in the investigation of phase transformations taking place in aluminium alloys.