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Date of Publication:2022-10-06

Journal:特种铸造及有色合金

Volume:33

Issue:5

Page Number:445-448

ISSN No.:1001-2249

Abstract:AZ31magnesium alloy bars with 10mm in diameters were prepared by vacuum
   horizontal continuous casting(VHCC)with a multi-mold composed of heated
   graphite mold and water cooling copper mold. Through comparing with
   master magnesium alloys prepared by metal mold casting, the
   microstructure and mechanical properties of the AZ31bars prepared were
   investigated. The results show that the microstructure of VHCC
   AZ31magnesium alloy consists of fine equiaxed grains with the size
   reduced from 300mum to 35mum, therefore the alloy prepared exhibits
   desirable comprehensive mechanical properties. The tensile strength and
   elongation are increased by 37. 6%and by 112. 5%, respectively. The
   tensile fractures of the AZ31magnesium alloy, in which cleavage facets
   become fewer and smaller while dimples and tear edges connecting
   together into river-like patterns become more, apparently presenting
   characteristics of quasi cleavage.

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