Effect of Nd on the Microstructure and Properties of Homogenized ZK60 Alloys

Zhang Yangyang; Le Qichi; Zhang Zhiqiang; Cui Jianzhong

doi:10.15980/j.tzzz.2012.11.026

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Effect of Nd on the Microstructure and Properties of Homogenized ZK60 Alloys
Vol. 32, Issue 11, Pages: 1058-1061(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.11.026

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[1]张洋洋,乐启炽,张志强,崔建忠.Nd对ZK60镁合金均匀化退火组织的影响[J].特种铸造及有色合金,2012,32(11):1058-1061.

Zhang Yangyang, Le Qichi, Zhang Zhiqiang, et al. Effect of Nd on the Microstructure and Properties of Homogenized ZK60 Alloys. [J]. Special Casting & Nonferrous Alloys 32(11):1058-1061(2012)
[1]张洋洋,乐启炽,张志强,崔建忠.Nd对ZK60镁合金均匀化退火组织的影响[J].特种铸造及有色合金,2012,32(11):1058-1061. DOI： 10.15980/j.tzzz.2012.11.026.

Zhang Yangyang, Le Qichi, Zhang Zhiqiang, et al. Effect of Nd on the Microstructure and Properties of Homogenized ZK60 Alloys. [J]. Special Casting & Nonferrous Alloys 32(11):1058-1061(2012) DOI： 10.15980/j.tzzz.2012.11.026.

摘要

研究了添加Nd元素的ZK60镁合金铸态和退火态的金相组织和相组成

同时测定了随着均匀化时间的不同合金硬度的变化。结果表明

Nd能显著细化镁合金晶粒

减少晶间的第二相。Nd在ZK60镁合金中形成Mg12Nd

均匀化后该相消失

其中的Nd以单质形式固溶到基体中

起到固溶强化作用。随着Nd含量的增加

固溶效果增加

需要的均匀化时间也增加。

Abstract

Effects of Nd addition on microstructure of as-cast and homogenized ZK60 magnesium were investigated by OM （optical microscope） and XRD （X-ray diffraction）

and influences of homogenizing time on the hardness of the alloy were measured. The results show that Nd can significantly refine grain size in the ZK60 magnesium alloy

reducing the intergranular second phase. Mg12Nd phase can be observed in the magnesium alloy

while it is absent in the homogenized alloy

in which Nd dissolved into the matrix alloy in the form of a simple phase

playing the role in solid solution strengthening. With the increase of Nd content

the solid solution effect is enhanced

and the homogenization time is increased.