Pr对Mg-0.6Zr合金组织和力学性能的影响

陈先毅; 王锦程; 林琳; 王改芳; 杨根仓

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Pr对Mg-0.6Zr合金组织和力学性能的影响
Effects of Pr Content on Microstructure and Mechanical Properties of Mg-0.6Zr Alloys
2009年29卷第3期页码：261-263
纸质出版日期： 2009 ，
DOI：

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[1]陈先毅,王锦程,林琳,王改芳,杨根仓.Pr对Mg-0.6Zr合金组织和力学性能的影响[J].特种铸造及有色合金,2009,29(03):261-263+194.

Chen Xianyi, Wang Jincheng, Lin Lin, et al. Effects of Pr Content on Microstructure and Mechanical Properties of Mg-0.6Zr Alloys[J]. Special Casting & Nonferrous Alloys, 2009,29(3):261-263.
[1]陈先毅,王锦程,林琳,王改芳,杨根仓.Pr对Mg-0.6Zr合金组织和力学性能的影响[J].特种铸造及有色合金,2009,29(03):261-263+194. DOI：

Chen Xianyi, Wang Jincheng, Lin Lin, et al. Effects of Pr Content on Microstructure and Mechanical Properties of Mg-0.6Zr Alloys[J]. Special Casting & Nonferrous Alloys, 2009,29(3):261-263. DOI：

摘要

用金属型铸造的方法制备得到由α-Mg及Mg12Pr组成的复相镁合金

利用光学显微镜、扫描电镜、X射线衍射仪等对合金显微组织和相组成进行了研究

通过拉伸试验测试了所制备合金的室温力学性能。研究发现

少量Pr可以细化Mg-0.6Zr合金晶粒

并生成强度较高的金属间化合物

Mg-0.6Zr-0.6Pr合金同时具有最高的抗拉强度和伸长率

分别比Mg-0.6Zr合金提高了9.8%和118%

其屈服强度则提高了42%。

Abstract

Dual-phase Mg alloy consisting of α-Mg and Mg12Pr was prepared by permanent mold casting.Effects of Pr content on microstructure and phase constituent of Mg-0.6Zr alloy were investigated by optical microscope（OM）

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

the mechanical properties of the prepared alloy at room temperature were measured by tensile testing.The results show that grain size in the magnesium alloy can be refined as a result of creation of high strength intermetallic compound

which is responsible for the improvement of mechanical properties of the alloy.Compared with those of Mg-0.6Zr alloy

the tensile strength

yield strength and elongation of Mg-0.6Zr-0.6Pr alloy are increased by 9.8%

42% and 118%

respectively.