Partitioning of Ca to metastable precipitates in a Mg-rare earth alloy

Qianying Shi; Anirudh Raju Natarajan; Anton Van der Ven; John Allison

doi:10.1080/21663831.2022.2138724

Materials Research Letters (Mar 2023)

Partitioning of Ca to metastable precipitates in a Mg-rare earth alloy

Qianying Shi,
Anirudh Raju Natarajan,
Anton Van der Ven,
John Allison

Affiliations

Qianying Shi: Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA
Anirudh Raju Natarajan: Materials Department, University of California, Santa Barbara, CA, USA
Anton Van der Ven: Materials Department, University of California, Santa Barbara, CA, USA
John Allison: Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA

DOI: https://doi.org/10.1080/21663831.2022.2138724
Journal volume & issue: Vol. 11, no. 3
pp. 222 – 230

Abstract

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The potential effect of the element Ca on the precipitation behavior was investigated in an Mg-rare earth alloy. A combination of metastable β′′′ and β′ precipitates was observed for the peak aging condition at 200°C. Ca addition was found to have no significant effect on the precipitating phases and evolution sequence. Composition analysis showed that the Ca partitioned to both β′′′ and β′ precipitate phases. First-principles calculations indicated that Ca partitions to the rare-earth sublattice in the precipitate phase. This finding suggests the potential of Ca to partially replace costly rare-earth elements in precipitation-hardened Mg-rare earth alloys.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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