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Low-Density Steels: The Effect of Al Addition on Microstructure and Properties

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Abstract

Density reduction of automotive steels is needed to reduce fuel consumption, thereby reducing greenhouse gas emissions. Aluminum addition has been found to be effective in making steels lighter. Such an addition does not change the crystal structure of the material. Steels modified with aluminum possess higher strength with very little compromise in ductility. In this work, different compositions of Fe-Al systems have been studied so that the desired properties of the material remain within the limit. A density reduction of approximately 10% has been achieved. The specific strength of optimal Fe-Al alloys is higher than conventional steels such as ultra-low-carbon steels.

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Acknowledgements

The authors acknowledge a DIST-FST grant for the SEM facility at the Institute of Nano-Science Initiative, Indian Institute of Science. The authors are thankful to Mr. Sashidhara for his help in carrying out the tension tests in INSTRON.

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Authors and Affiliations

  1. Department of Materials Engineering, Indian Institute of Science, Bangalore, 560 012, Karnataka, India

    Sudipta Pramanik & Satyam Suwas

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  1. Sudipta Pramanik
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  2. Satyam Suwas
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Correspondence to Satyam Suwas.

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Pramanik, S., Suwas, S. Low-Density Steels: The Effect of Al Addition on Microstructure and Properties. JOM 66, 1868–1876 (2014). https://doi.org/10.1007/s11837-014-1129-2

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  • DOI: https://doi.org/10.1007/s11837-014-1129-2

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