Abstract
Research in recycling Al-alloy is necessary for a sustainable industrial development. Iron present in the recycled Al-alloys deteriorates its mechanical properties. The challenge, therefore, is to tackle the iron impurity using different methodologies. The present study focuses on a strategy by which iron containing beta phase could be destabilized with the addition of Ni. A large number of microstructural image, lattice parameter data and mechanical properties have been obtained using optical microscopy with state-of-the-art image analysis, FESEM with EDS and EBSD, XRD, Vickers microhardness and universal tensile testing. Based on these results, the present work provide necessary insight about the effect of Ni addition in the recycled Al-Si cast alloys containing as high as 2wt% Fe. Finally, it was concluded that up to 4wt% Ni addition could be beneficial for Al-Si alloys Si content limited to 9wt%.
Highlights
Image analysis is a useful tool for determining the area fraction of multiple phases which might or might not appear in similar grey-scale level on lightly shaded matrix; the area fraction of matrix phase can be determined
It is pertinent here to discuss about the technique deployed for the image analysis in brief
Many a times the optical micrograph suffers from partial shadowing due to slightest obliqueness on the polished surface and image analysis of such unprocessed raw images becomes difficult, sometimes impossible
Summary
C.B. Basak et al / Materials and Design 182 (2019) 108017 aluminium accumulates different metallic impurities due to the diversified source of the scrap and with the increasing number of recycling processes. Basak et al / Materials and Design 182 (2019) 108017 aluminium accumulates different metallic impurities due to the diversified source of the scrap and with the increasing number of recycling processes Presence of these metallic impurities, either in solid solution or as a separate phase, poses a great challenge to obtain the same physico-mechanical properties as that of the virgin aluminium [3,4]. The aim of the recycling could be shifted from making the commercially pure Al to developing a new castable Al-alloy with a different chemical composition. The present work demonstrates Ni as the potential element to destabilize the β-phase and investigates its effect in the microstructure and the tensile properties of the modified Al-Si-Fe alloys with Si of 6 wt%, 9 wt% and 12 wt% having a fixed Fe content of 2 wt%
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
