MC2マグネシウム合金の組織に及ぼす凝固条件の影響

鎌土 重晴; 佃 誠; 徳富 一郎; 広瀬 喜興

doi:10.2464/jilm.37.714

Effect of solidification conditions on microstructures of unidirectionally solidified AZ91C alloy

Shigeharu KAMADO, Makoto TSUKUDA, Ichirou TOKUTOMI, Kikou HIROSE

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Keywords: magnesium casting alloy, microstructure, unidirectional solidification, heat treatment, cooling rate

JOURNAL FREE ACCESS

1987 Volume 37 Issue 11 Pages 714-720

DOI https://doi.org/10.2464/jilm.37.714

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Published: November 30, 1987 Received: July 05, 1986 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 23, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : AZ91C magnesium alloys were unidirectionally solidified at various liquid cooling rates (V _LC), average cooling rates in solidification range (V _SC), temperature gradients (G), moving velocities of solid-liquid interface (R) and G/R ratios. Equiaxed dendrite structure was obtained by the superheating of molten metal. Dendrite cell size decreases exponentially with increasing liquid cooling rate. With increasing average cooling rate and with decreasing temperature gradient, the amount of eutectic compounds increases and it extends at triple junctions of cell boundaries and individual cell boundaies. In AZ91C-T6 alloy, the eutectic compounds dissolve by solution heat treatment. Discontinuous precipitates along cell boundaries were observed by optical microscopy and their width decreases with increasing liquid cooling rate.
Right : AZ91C magnesium alloys were unidirectionally solidified at various liquid cooling rates (V _LC), average cooling rates in solidification range (V _SC), temperature gradients (G), moving velocities of solid-liquid interface (R) and G/R ratios. Equiaxed dendrite structure was obtained by the superheating of molten metal. Dendrite cell size decreases exponentially with increasing liquid cooling rate. With increasing average cooling rate and with decreasing temperature gradient, the amount of eutectic compounds increases and it extends at triple junctions of cell boundaries and individual cell boundaies. In AZ91C-T6 alloy, the eutectic compounds dissolve by solution heat treatment. Discontinuous precipitates along cell boundaries were observed by optical microscopy and their width decreases with increasing liquid cooling rate.

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

AZ91C magnesium alloys were unidirectionally solidified at various liquid cooling rates (V _LC), average cooling rates in solidification range (V _SC), temperature gradients (G), moving velocities of solid-liquid interface (R) and G/R ratios. Equiaxed dendrite structure was obtained by the superheating of molten metal. Dendrite cell size decreases exponentially with increasing liquid cooling rate. With increasing average cooling rate and with decreasing temperature gradient, the amount of eutectic compounds increases and it extends at triple junctions of cell boundaries and individual cell boundaies. In AZ91C-T6 alloy, the eutectic compounds dissolve by solution heat treatment. Discontinuous precipitates along cell boundaries were observed by optical microscopy and their width decreases with increasing liquid cooling rate.

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