an official journal of: published by:
an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU
Home

 

GO TO

IMPACT OF CHEMICAL COMPOSITION ON HOT TEARING IN SECONDARY WROUGHT ALUMINUM ALLOYS

  • Emidio Giansante - Department of Management and Engineering, University of Padova, Italy
  • Giulio Timelli - Department of Management and Engineering, University of Padova, Italy
  • Alberto Fabrizi - Department of Management and Engineering, University of Padova, Italy

DOI 10.31025/2611-4135/2024.19432

Access restricted to subscribed members only

Released under All rights reserved

Copyright: © 2024 CISA Publisher

Abstract

Hot tearing represents one of the most detrimental defects in metal castings and it is a key parameter for evaluating alloy castability. Hot tearing in aluminum alloys has gained attention from several research groups over the past century. To date, there are several theories that aim to understand the mechanisms and identify the parameters affecting the formation of hot cracks. This study aims to evaluate the influence of chemical composition on the hot cracking index of eight commercial wrought alloys of 6xxx series (Al-Mg-Si alloys), produced from recycled scrap. First, a thermodynamic calculation software was used to determine the solidification path of the alloys under non-equilibrium conditions; subsequently, a pure theoretical criterion, the Kou model, was adopted to predict the susceptibility of hot tearing. The results reveal that variations in chemical composition affect the cracking index, and the alloy 6082 shows the higher vulnerability to hot cracking. Furthermore, minimizing the element content yields a minimum value of the hot cracking susceptibility index.

Keywords

Editorial History

  • Received: 06 May 2024
  • Revised: 11 Jul 2024
  • Accepted: 20 Aug 2024
  • Available online: 08 Oct 2024

References

Benoit, M., Whitney, M., Zhu, S., Zhang, D., Field, M., and Easton, M. (2023). The beneficial effect of minor iron additions on the crack susceptibility of rapidly solidified aluminum alloy 6060 toward additive manufacturing applications . Materials Characterization

Campbell, J. (2015). Complete Casting Handbook. Elsevier Ltd

Clyne, T., and Davies, G. (1975). A Quantitative Solidification Test for Casting and an Evaluation of Cracking in Aluminium-Magnesium Alloys. The British Foundrymen, 238-244

Cui, J., and Roven, H. (2010). Recycling of automotive aluminum. Transactions of nonferrous metals society of China, 2057-2063

D’Errico, F., and Mattavelli, D. (2017). Secondary Aluminum Alloys Processed by Semisolid Process for Automotive Application. The Minerals, Metals and Materials Society

Easton, M., St. John, D., and Sweet, L. (2010). Grain Refinement and Hot Tearing of Aluminium Alloys - How to Optimise and Minimise . Materials Science Forum, 630, 213-221

Easton, M., Wang, H., Grandfield, J., Davidson, C., Stjohn, D., Sweet, L., and Couper, M. (2012). Observation and prediction of the hot tear susceptibility of ternary Al-Si-Mg Alloys. Metallurgical and Materials Transactions A, 3227-3238

Eskin, D., Suyitno, and Katgerman, L. (2004). Mechanical properties in the semi-solid state and hot tearing of aluminium alloys. Progress in Materials Science

Feurer, U. (1977). Quality control of engineering alloys and the role of metals science. Delft

Graf, A. (2021). Aluminum alloys for lightweight automotive structures. In Materials, Design and Manufacturing for Lightweight Vehicles (pp. 97-123). Elsevier Ltd

Hu, B., Li, D., Li, Z., Xu, J., Wang, X., and Zeng, X. (2021). Hot Tearing Behavior in Double Ternary Eutectic Alloy System: Al-Mg-Si Alloys. Metallurgical and materials transactions a

Kou, S. (2015). A criterion for cracking during solidification. Acta Materialia, 88, 366-374

Li, R., Wang, M., Li, Z., Cao, P., Yuan, T., and Zhu, H. (2020). Developing a high-strenght Al-Mg-Si-Sc-Zr alloy for selective laser melting: crack-inhibiting and multiple strenghtening mechanism. Acta Materialia, 83-98

Li, S., and Apelian, D. (2011). Hot tearing of aluminum alloys a critical literature review. International Journal of Metalcasting

Möller, H., Daswa, P., and Govender, G. (2015). The mechanical properties of rheo-high pressure die cast Al-Mg-Si-(Cu) 6XXX series alloys. Solid State Phenomena, 61-66

Niyama, E. (1977). Japan-Us joint seminaron solidification of metals and alloys. Japan society for promotion of science

Padamata, S. K., Yasinskiy, A., and Polyakov, P. (2021). A Review of Secondary Aluminum Production and Its Byproducts. JOM, 73(9), 2603-2614

Rappaz, M., Drezet, J.-M., and Gremaud, M. (1999). A new hot tearing criterion. Materials Transactions, 449-455

Sweet, L., Easton, M., Taylor, J., Grandfield, J., Davidson, C., Lu, L., . . . Stjohn, D. (2013). Hot Tear Susceptibility of Al-Mg-Si-Fe Alloys with Varying Iron Contents. Metallurgical and materials transactions a

Sweet, L., Taylor, J., Easton, M., Couper , M., and Parson, N. (2012). Chemical additions to reduce hot tearing in the cast house. Light Metals 2012 - TMS (the minerals, Metals and Materials Society) 2012

Van den Eynde, S., Bracquené, E., Diaz-Romero, D., Zaplana, I., Engelen, B., Duflou, J., and Peeters, J. (2022). Forecasting global aluminium flows to demonstrate the need for improved sorting and recycling methods . Waste Management, 231-240

Related Contents