INVESTIGATION OF THE CRYSTALLOGRAPHIC TEXTURE OF THIN TAPES MADE OF ALUMINUM ALLOYS AD0, AMC AND D16

IDMZJJ

Abstract

The reduction in the thickness of aluminium sheet alloys allows the production of lightweight structures and laminated composites. However, the mechanical and technological properties of alloys change significantly when the thickness of samples is reduced to less than 0.5 mm. One reason for this behavior is the crystallographic texture. To study its features, thin tapes of 0.4 and 0.2 m thick AD0, AMz and D16 alloys were produced by cold rolling and annealed. There are complete and inverse pole figures, dependence of pole density on thickness of samples and grade of alloy. It has been established that in the alloy D16 after cold rolling and annealing in 0.4 and 0.2 mm thick samples texture components are retained, their pole density is changed. In technical aluminium AD0, some texture components such as {110}<1-12>, {4-16}<-121>, {-3-5-1}<1-12>, {110}<001> are retained, components {213}<11-1> and {311}<112-> are present only in samples thickness 0,4, and components {31-1}<353> are only present in 0.2 mm thick samples. The Al-1%Mn alloy has a large textless component, which is a set of different components that are not found in most aluminum alloys, including those presented in this study. The mechanical properties of thin tapes made of studied alloys are related to the crystallographic texture. The consistency of texture components in D16 alloy samples results in a reduction in mechanical properties with a reduction in thickness from 0.4 to 0.2 mm. The textless condition observed in the Al-1%Mn alloy causes a decrease in strength and an increase in plasticity, a mixed state of crystallographic texture in technical aluminium AD0 causes increased strength and reduced elongation.