Effect of Ca Addition on Microstructure and Properties of As-cast Mg-5Sn-3Al-2Zn Alloys

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Effect of Ca Addition on Microstructure and Properties of As-cast Mg-5Sn-3Al-2Zn Alloys
Vol. 35, Issue 11, Pages: 1133-1136(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.11.004

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[1]曹凤红,陈云贵,丁武成,崔志明,窦韶旭.Ca对铸态Mg-5Sn-3Al-2Zn合金组织与性能的影响[J].特种铸造及有色合金,2015,35(11):1133-1136.

Cao Fenghong, Chen Yungui, Ding Wucheng, et al. Effect of Ca Addition on Microstructure and Properties of As-cast Mg-5Sn-3Al-2Zn Alloys. [J]. Special Casting & Nonferrous Alloys 35(11):1133-1136(2015)
[1]曹凤红,陈云贵,丁武成,崔志明,窦韶旭.Ca对铸态Mg-5Sn-3Al-2Zn合金组织与性能的影响[J].特种铸造及有色合金,2015,35(11):1133-1136. DOI： 10.15980/j.tzzz.2015.11.004.

Cao Fenghong, Chen Yungui, Ding Wucheng, et al. Effect of Ca Addition on Microstructure and Properties of As-cast Mg-5Sn-3Al-2Zn Alloys. [J]. Special Casting & Nonferrous Alloys 35(11):1133-1136(2015) DOI： 10.15980/j.tzzz.2015.11.004.

利用XRD、SEM、OM等手段

对不同Ca含量的铸态Mg-5Sn-3Al-2Zn合金的组织、力学性能及断口进行了研究与分析。结果表明

不同Ca含量的Mg-Sn-Al-Zn合金主要由α-Mg、Mg2Sn、CaMgSn、Al2Ca相组成。当Ca含量为1.0%时

合金的室温力学性能最高;当Ca含量达到2.0%时

合金基体中分布有大量粗大针状、棒状的CaMgSn和Al2Ca等相

其力学性能大幅度下降;其断裂机制均为解理和准解理断裂。

The microstructure and fracture of as-cast Mg-5Sn-3Al-2Zn alloy were analyzed by XRD（X-ray diffraction）

SEM（scanning electron microscopy）

OM（optical microscopy）.The results reveal that Mg-5Sn-3Al-2Zn-xCa alloys are composed mainly ofα-Mg

Mg2 Sn

CaMgSn

Al2 Ca phase.With the Ca addition of 1.0%

the ambient mechanical properties of the alloy reach up to the maximum value

while the Ca content of 2.0%

a large thick needle or rod-like CaMgSn or Al2 Ca phase can be observed in the matrix alloy

resulting in the obvious deterioration of the mechanical properties of the alloy.In addition

the fracture mechanism is characterized by cleavage and quasi-cleavage fracture.

Mg-5Sn-3Al-2Zn合金显微组织力学性能断裂机制

Mg-5Sn-3Al-2Zn AlloyMicrostructureMechanical PropertiesMechanism Of Fracture

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