Microstructural characterization of the Mg-Al alloy AM50 produced by a newly developed rheo-casting process
Artikel i vetenskaplig tidskrift, 2014

The microstructure of rheo-cast Mg-Al alloy AM50 produced by the RheoMetal process is investigated and compared with the same alloy produced by conventional high pressure die casting. The size and arrangement of microstructural constituents and pores are characterized quantitatively using image analyzing techniques. The nearest neighbor distribution of the intermetallic particles is determined. The area fraction of porosity in rheo-cast AM50 is about half that found in the high pressure die cast alloy. In rheo-cast material, the distribution of p phase (Mg17Al12) is relatively uniform throughout the cast. In contrast, the beta phase particles tend to form macroscopic agglomerates in high pressure die cast material. The externally solidified grains in the rheo-cast material exhibit a smaller aluminum gradient than in the high pressure die cast alloy. This indicates that the solidification of the rheo-cast material is closer to equilibrium.

TEXTURE

Magnesium

High pressure die casting

CORROSION

PROCESS PARAMETERS

MAGNESIUM ALLOY

RheoMetal process

Microstructure

MECHANICAL-PROPERTIES

AZ91D

SIMA

Författare

Mohsen Esmaily

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Mehrdad Shahabi Navid

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Nooshin Mortazavi Seyedeh

Chalmers, Teknisk fysik, Materialens mikrostruktur

Jan-Erik Svensson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Mats Halvarsson

Chalmers, Teknisk fysik, Materialens mikrostruktur

M. Wessen

Hogskolan i Jonkoping

A. E. W. Jarfors

Hogskolan i Jonkoping

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Materials Characterization

1044-5803 (ISSN)

Vol. 95 50-64

Ämneskategorier

Materialteknik

DOI

10.1016/j.matchar.2014.06.001