Metallographic Etch for Cast AZ91D Magnesium Alloy

Fu Zhennan; Xiong Shoumei

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Metallographic Etch for Cast AZ91D Magnesium Alloy
Issue 7, Pages: 496-498(2007)
Published： 2007 ，
DOI：

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[1]付振南,熊守美.铸造镁合金AZ91D金相腐蚀方法研究[J].特种铸造及有色合金,2007(07):496-498+487.

Fu Zhennan, Xiong Shoumei. Metallographic Etch for Cast AZ91D Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (7):496-498(2007)
[1]付振南,熊守美.铸造镁合金AZ91D金相腐蚀方法研究[J].特种铸造及有色合金,2007(07):496-498+487. DOI：

Fu Zhennan, Xiong Shoumei. Metallographic Etch for Cast AZ91D Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (7):496-498(2007) DOI：

摘要

对砂型和金属型铸造AZ91D试样进行了铸态下与固溶处理后金相腐蚀研究

对压铸AZ91D试样进行铸态金相腐蚀和EBSD试验研究。结果表明

铸态砂型和金属型试样树枝晶形状显示六重对称性特征

一次枝晶间夹角为60°

固溶处理后晶粒尺寸变大。压铸试样冷却速度快

枝晶不能充分生长

难以显示六重对称性特征

EBSD试验能够准确测量压铸试样的晶粒尺寸和晶粒取向。

Abstract

The metallographic etch for as-cast and solid solution treated samples of AZ91D magnesium alloy in sand casting and permanent mould casting has been performed

and as-cast microstructure and ESBD experiment of die casting AZ91D magnesium alloy have been investigated.The results show that the dendrites in as-cast microstructures of sand casting and permanent mold samples are characterized by sixtuple-symmetrical features

in which the angle between the primary dendrites is 60°

and the grain size can coarsen after solid solution.The absence of sixtuple-symmetrical features can be observed as a result of high cooling rate restraining the full growth of dendrites in die casting samples.EBSD experiment can accurately measure the grain size and grain orientation in die casting samples.