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Microstructural changes in welded Zn–Al alloy

Published online by Cambridge University Press:  31 January 2011

Yao Hua Zhu
Yao Hua Zhu
Affiliation:
Instituto de Investigaciones en Materiales, UNAM Apdo. P. 70–360, Mexico D.F. 04510, Mexico
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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.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 3 , March 1996 , pp. 593 - 598
Copyright
Copyright © Materials Research Society 1996

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References

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