Abstract

Although magnesium alloys, as the lightest structural alloys, offer significant potential for automotive applications, their applications remain limited due to their poor formability at room temperature. Since the strategies used for improving formability usually result in a degradation of strength, there are no high strength magnesium alloys showing good formability. Here we report an alloy design concept that can simultaneously provide high strength and good formability. Such designed alloy when subjected to an appropriate processing technique shows a combination of strength and formability that surpasses those of the existing magnesium alloys reported so far. The alloy design concept used in the present study is based on the utilization of alloying elements that can induce precipitation, as well as maximize the segregation of other texture-controlling alloying elements. Such developed alloy is expected to broaden the application of Mg alloy sheets, which are now starting to gain acceptance by automotive industries.

Highlights

  • Magnesium alloys, as the lightest structural alloys, offer significant potential for automotive applications, their applications remain limited due to their poor formability at room temperature

  • There have been numerous attempts to improve formability of magnesium alloys and it has been shown that the formability of Mg alloys can be improved by texture randomization/weakening from the typical strong basal texture of conventional Mg alloys, which is usually achieved by the modification of thermomechanical processing[7,8] and the addition of rare earth elements (REEs)[9,10,11]

  • When Al is added to ZX alloys, the formation of Al2Ca particles becomes inevitable, which might reduce the degree of Ca segregation along grain boundaries resulting in a less desirable basal texture

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Summary

Introduction

As the lightest structural alloys, offer significant potential for automotive applications, their applications remain limited due to their poor formability at room temperature. AZMX3110 alloy was designed to utilize a beneficial effect of Zn/ Ca co-segregation along grain boundaries on randomizing/ weakening texture[17] and to promote precipitation of intermetallic compounds that can increase strength.

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Conclusion

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