Microstructure and Strengthening-toughening Mechanism of Mg-RE（Nd, Y）-0.48Zn-0.52Zr Alloys

Dong Lijun1; Xia Changqing1; Wu Anru2; Gao Weiguo2

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Microstructure and Strengthening-toughening Mechanism of Mg-RE（Nd, Y）-0.48Zn-0.52Zr Alloys
Vol. 29, Issue 10, Pages: 901-904(2009)
Published： 2009 ，
DOI：

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[1]董丽君,夏长清,吴安如,高为国.Mg-RE(Nd,Y)-0.48Zn-0.52Zr合金显微组织及强韧化机理[J].特种铸造及有色合金,2009,29(10):901-904+876-877.

Dong Lijun1, Xia Changqing1, Wu Anru2, et al. Microstructure and Strengthening-toughening Mechanism of Mg-RE（Nd, Y）-0.48Zn-0.52Zr Alloys. [J]. Special Casting & Nonferrous Alloys 29(10):901-904(2009)
[1]董丽君,夏长清,吴安如,高为国.Mg-RE(Nd,Y)-0.48Zn-0.52Zr合金显微组织及强韧化机理[J].特种铸造及有色合金,2009,29(10):901-904+876-877. DOI：

Dong Lijun1, Xia Changqing1, Wu Anru2, et al. Microstructure and Strengthening-toughening Mechanism of Mg-RE（Nd, Y）-0.48Zn-0.52Zr Alloys. [J]. Special Casting & Nonferrous Alloys 29(10):901-904(2009) DOI：

摘要

采用光学显微镜、扫描电镜及X射线衍射等对Mg-RE（Nd

Y）-0.48Zn-0.52Zr合金组织及相组成进行了分析。对2种合金的挤压态试样进行了室温力学性能及高温力学性能试验

并与T5热处理后进行比较。Mg-Nd-0.48Zn-0.52Zr合金在300℃时的抗拉强度为79.00MPa

Mg-Nd-Y-0.48Zn-0.52Zr合金在330℃时的抗拉强度为202.53MPa

试验结果表明

添加Y对提高合金高温抗拉强度有明显的作用。

Abstract

Microstructure and phase constituent of Mg-RE（Nd

Y）-0.48Zn-0.52Zr alloy were analyzed by OM （optical microscope）

SEM （scanning electron microscope） and XRD （X-ray diffraction）. Meanwhile

the mechanical properties at room temperature and at high temperature of two kinds of as-extruded samples were tested

and they were compared with those of extrusion +T5 heat treated ones. The results show that tensile strength of Mg-RE（Nd）-0.48Zn-0.52Zr reaches 79MPa at 300℃ while tensile strength of Mg-RE（Y）-0.48Zn-0.52Zr reaches 202.53MPa at 330℃. The Y element plays the obvious role in improving elevated tensile strength of the alloy.