Effects of yttrium on microstructure and mechanical properties of Mg-Zn-Cu-Zr alloys

Effects of yttrium on microstructure and mechanical properties of Mg-Zn-Cu-Zr alloys

The effects of yttrium addition on microstructure and mechanical properties of as-cast Mg-6Zn-3Cu-0.6Zr-xY（x=0,0.5, 1.0,1.5 and 2.0,mass fraction,%）（ZCK630＋xY for short in this study）alloys were investigated by means of OM,XRD and SEM. The results show that the average grain size of Mg-Zn-Cu-Zr magn...

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Veröffentlicht in:Transactions of Nonferrous Metals Society of China 2010-07, Vol.20 (B07), p.357-360
1. Verfasser: 白云 房灿峰 郝海 齐国红 张兴国
Format: Artikel
Sprache:eng
Schlagworte:
Deterioration
Grain size
Magnesium base alloys
Mechanical properties
mechanical property
Mg-Zn-Cu-Zr alloy
Microstructure
Phases
X射线衍射分析
Yttrium
力学性能
平均晶粒尺寸
微观结构
极限拉伸强度
铜锆合金
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Zusammenfassung:The effects of yttrium addition on microstructure and mechanical properties of as-cast Mg-6Zn-3Cu-0.6Zr-xY（x=0,0.5, 1.0,1.5 and 2.0,mass fraction,%）（ZCK630＋xY for short in this study）alloys were investigated by means of OM,XRD and SEM. The results show that the average grain size of Mg-Zn-Cu-Zr magnesium alloy is effectively reduced（from 57μm to 39μm）by Y addition.The analysis of XRD indicates the existence of I-phase（Mg3Zn6Y）and W-phase（Mg3Zn3Y2）in ZCK630 alloys with Y addition.The ultimate tensile strength of ZCK630 alloys is significantly deteriorated with increasing Y addition,which is possibly related to the continuous networks of intergranular phases and the increase of W-phase.
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60497-9