Mechanical properties and microstructure of aluminum 2618 alloy containing manganese and chromium

Abstract

Tensile strength and yield stress of a 2618 aluminum alloy containing chromium and manganese were measured to study the influence of aging treatment. The microstructure was examined by using energy dispersive spectroscopy and x-ray microanalysis. Complex phases based on silicon/magnesium, iron/nickel and manganese/chromium were revealed in all examined specimens. It was found that the precipitation hardening effects were reduced in alloys containing higher amount of chromium as well as chromium and manganese.