Influence of Zn and Sn on the precipitation behavior of new Al-Mg-Si alloys

Glöckel F, Uggowitzer PJ, Felfer P, Pogatscher S, Höppel HW (2019)


Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 12

Article Number: 2547

Journal Issue: 16

DOI: 10.3390/ma12162547

Abstract

In this study, we demonstrate how Zn and Sn influence hardening behavior and cluster formation during pre-aging and paint bake treatment in Al-Mg-Si alloys via hardness tests, tensile tests, and atom probe tomography. Compared to the standard alloy, the Sn-modified variant shows reduced cluster size and yield strength in the pre-aged condition. During the paint bake cycle, the clusters start to grow very fast and the alloy exhibits the highest strength increment. This behavior is attributed to the high vacancy binding energy of Sn. Adding Zn increases the formation kinetics and the size of Mg-Si co-clusters, generating higher yield strength values for both the pre-aged and paint baked conditions. Simultaneous addition of Zn and Sn creates a synergistic effect and produces an alloy that exhibits moderate strength (and good formability) in the pre-aged condition and accelerated hardening behavior during the paint bake cycle.

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APA:

Glöckel, F., Uggowitzer, P.J., Felfer, P., Pogatscher, S., & Höppel, H.W. (2019). Influence of Zn and Sn on the precipitation behavior of new Al-Mg-Si alloys. Materials, 12(16). https://dx.doi.org/10.3390/ma12162547

MLA:

Glöckel, Felix, et al. "Influence of Zn and Sn on the precipitation behavior of new Al-Mg-Si alloys." Materials 12.16 (2019).

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