Analysis of Inclusions and Impurities Present in Typical HPDC, Stamping and Extrusion Alloys Produced with Different Scrap Levels

Author:

da Silva Manel1ORCID,Pujante Jaume1ORCID,Hrabia-Wiśnios Joanna2ORCID,Augustyn Bogusław2ORCID,Kapinos Dawid2ORCID,Węgrzyn Mateusz2ORCID,Boczkal Sonia2ORCID

Affiliation:

1. Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Avda. Universitat Autònoma 23, 08290 Cerdanyola del Vallès, Spain

2. Lukasiewicz Research Network—Institute of Non Ferrous Metals, Light Metals Centre, Pilsudski 19 Street, 32-050 Skawina, Poland

Abstract

The European Green Deal poses a two-pronged challenge for the automotive industry: migrating to solutions based on light structures, requiring lightweight concepts and light materials, while at the same time avoiding dependence on the importation of these advanced materials. Aluminium alloys are lightweight and cost-effective materials that can successfully meet the requirements of many structural applications; however, their production requires bauxite and other Critical Raw Materials (CRMs), such as Si and Mg. Aluminium alloys are fully recyclable, but scrap is usually contaminated and its use is related to an increment of impurities, tramp elements and undesired inclusions. Traditionally, the use of secondary alloys has been restricted to low-performance applications. The present work analyses the effect that the use of scrap has on the quantity of inclusions present in the alloy and on other properties relevant for material processing. This study was carried out using common alloys associated with three of the most common aluminium processes used in the car manufacturing industry: high-pressure die casting (HPDC) (AB-43500), extrusion (6063) and sheet metal forming (5754 and 6181). The reference alloys were mixed with different levels of scrap (0, 20, 40, 60, 80 and 100%), with an aim to keep the chemical composition as unaffected as possible. The inclusion level of the alloy was characterized using the Prefil Footprinter® test. In addition, the obtained materials, after being cast in an open mould, were subjected to metallographic characterization. Relevant properties were measured to assess the processability of the alloys for the corresponding transforming process using the flowability test for the HPDC alloy and high-temperature compression for the extrusion alloys. The results obtained suggest that the number of inclusions present in the melt highly increase with the amount of scrap used to produce the alloy. These inclusions are also related to a significant loss of flowability, but do not have a noticeable impact on microstructure.

Funder

EU research and innovation program Horizon 2020

Publisher

MDPI AG

Reference30 articles.

1. (2023, May 23). European Aluminium. Available online: https://european-aluminium.eu/wp-content/uploads/2022/10/aluminum-content-in-european-cars_european-aluminium_public-summary_101019-1.pdf.

2. Ismail, A., and Mohamed, M.S. (2016, January 19–21). Review on sheet metal forming process of aluminium alloys. Proceedings of the 17th International AMME Conference, Cairo, Egypt.

3. Recent development in aluminium alloys for the automotive industry;Miller;Mater. Sci. Eng. A,2000

4. Guido Sonnemann: What do We Know about Metal Recycling Rates?;Graedel;J. Ind. Ecol.,2011

5. Science of dirty alloys;Kaufmann;AluReport,2019

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