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Microstructural changes in welded Zn–Al alloy

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Abstract

Extruded eutectoid Zn–Al alloy was welded by a melt of the same eutectoid alloy. Two different microstructures were observed in the joint part and in the bulk of the welded alloy. Typical dendritic structure of as-cast Zn–Al alloy was observed in the joint part of the welded alloy. The bulk of the welded Zn–Al alloy appeared as fine grain structure. Two different metastable phases, η′T decomposed from η′s of the chilled as-cast state and η′E of the extruded state, were found to be unstable during the early stages of aging. A four-phase transformation occurred after the decompositions of these two metastable phases of η′T. Microstructures of both the joint part and bulk of the welded alloy were investigated simultaneously during the aging processes.

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Authors and Affiliations

  1. Instituto de Investigaciones en Materiales, UNAM, Apdo. P. 70-360, Mexico D.F., 04510, Mexico

    Yao Hua Zhu

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  1. Yao Hua Zhu
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Zhu, Y.H. Microstructural changes in welded Zn–Al alloy. Journal of Materials Research 11, 593–598 (1996). https://doi.org/10.1557/JMR.1996.0072

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  • DOI: https://doi.org/10.1557/JMR.1996.0072

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