Influence of Al 6101 alloy structure on pore formation in static tension as a structural change during deformation

Abstract

In this work, the influence of the material structure (coarse- and fine-grained) on the formationof pores under static loading at room temperature as a structural change during deformation is studied.To improve the properties of metallic materials, the methods of thermal hardening and aging, aswell as the methods of severe plastic deformation (SPD), are used. These methods are interesting dueto the profound change in the structure, physical and mechanical properties, and phase composition.To evaluate the impact of these methods of material processing, modern researchers are studyingthe application of various types of loading, further processing, as well as the study of changes in thesurface and internal structure of objects obtained using these methods. Previously, it was proved thatwith a decrease in the grain size, the pore sizes of the material, formed during static tension at roomtemperature, decrease: the coarse-grained state corresponds to pores with a size of 3–7 μm, and forthe ultrafine-grained state, 1–2 μm. In this paper, this study is supplemented by a new result: the typeof heat treatment of coarse-grained material (natural aging) entails the formation of pores throughoutthe entire loading area of the material, in contrast to artificially aged coarse-grained material or materialwith an ultrafine-grained structure, where the pores are located near the fracture area.