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Development of an aluminum sheet alloy with improved formability

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Abstract

Aluminum auto-body sheet alloys with enhanced formability have been developed in the Al-Mn-Mg-Si system. The improvement in formability is due to a fine grain size, a precise control of solute elements (especially Si), and virtual elimination of coarse second-phase particles. These refined features, achieved in part from the use of a high casting cooling rate, result in a fine deformed dislocation substructure which resists strain localization. The absence of coarse particles delays final fracture. The experimental alloys had a positive strain-rate sensitivity which is not normally observed in alloys containing Mg.

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  1. Metallurgy Department, General Motors Research Laboratories, 48090, Warren, MI

    Anil K. Sachdev (Staff Research Engineer)

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  1. Anil K. Sachdev
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Sachdev, A.K. Development of an aluminum sheet alloy with improved formability. Metall Trans A 21, 165–175 (1990). https://doi.org/10.1007/BF02656434

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  • DOI: https://doi.org/10.1007/BF02656434

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