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Microstructural Changes of Welded Zn-AI Alloy

Published online by Cambridge University Press:  03 September 2012

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 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 ofthe welded Zn-Al alloy appeared as fine grain structure. Two different metastable phases η'T decomposed from η's of chilled as cast state and η'E of extruded state were found to be unstable during early stage of ageing. A four phase transformation occurred after the decompositions of these two metastable phases of η'T. Microstructures of both joint part and bulk of the welded alloy were investigated parallely during ageing processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 367: Symposium P – Fractal Aspects of Materials , 1994 , 391
Copyright
Copyright © Materials Research Society 1995

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