Analysis of the load distribution in a Fe-rich aluminum alloy during tensile deformation using synchrotron X-ray diffraction

Abstract

The load transfer mechanism during tensile deformation of an Al-Cu-Fe alloy is analysed on the basis of in-situ synchrotron radiation X-ray diffraction data. The alloy was specifically fabricated with a high Fe content to simulate recycled Al alloy. The final aim of the study is to explore the potential of using recycled alloys for structural application. As is well known, recycled Al alloys are characterized by a high amount of Fe content, which is usually detrimental to their mechanical properties. However, microstructural modification through friction stir processing (FSP) has emerged as a promising approach to address this issue. The relevance of the load transfer mechanism after FSP is shown to be outstandingly manifested during the onset of plastic deformation. It is proposed that this mechanism accounts for a well adhered interface between the Al matrix and the Cu- and Fe-rich particles. For comparative purposes the in-situ synchrotron X-ray diffraction measurements were conducted on, both, the as-processed alloy (initial) microstructure as well as FSPed microstructure. As anticipated, relevant findings regarding the load transfer mechanisms are derived from the study in both conditions.