Zn含量对Mg-10Gd-4.8Y-0.6Zr合金组织和力学性能的影响

李慧中; 刘洪挺; 陈健美; 王海军; 梁霄鹏

Zn含量对Mg-10Gd-4.8Y-0.6Zr合金组织和力学性能的影响

1.
湖南涉外经济学院机械工程学院,长沙,410205;
2.
中南大学有色金属材料科学与工程教育部重点实验室,长沙,410083

基金项目:

中国博士后基金资助项目(20070420828);中南大学博士后基金资助项目(2007-8)

详细信息

作者简介:
李慧中(1968- ),男,博士,副教授,(E-mail)lhz606@mail.csu.edu.cn.

中图分类号: TG146.1;TG146.2
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出版历程
- 刊出日期: 2011-10-01

Effects of Zn Addition on Microstructure and Mechanical Properties of Mg-10Gd-4.8Y-0.6Zr Alloy

1.
School of Mechanical Engineering,Hunan International Economics University,Changsha 410205,China;
2.
Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China

摘要

摘要: 采用显微硬度和力学性能测试及金相显微镜、扫描电镜、透射电镜、X射线衍射等分析手段,研究了Zn含量对Mg-10Gd-4.8Y-0.6Zr合金挤压以及时效处理后合金组织和力学性能的影响.结果表明,在Mg-10Gd-4.8Y-0.6Zr合金中添加Zn元素,有利于细化合金晶粒,提高挤压态的强度.未添加Zn的合金T5态晶粒尺寸约为25μm,添加1%(质量分数,下同)Zn后,晶粒尺寸约为15μm,Zn含量为3%时,晶粒尺寸约为10μm.当Zn含量为1%时,合金挤压态和时效态的抗拉强度分别为337MPa,397MPa,屈服强度分别为128MPa,148MPa,伸长率分别为10.0%,5.0%,具有较好的综合性能.
- Mg-10Gd-4.8Y-0.6Zr合金 /
- Zn元素 /
- 挤压-时效 /
- 显微组织 /
- 力学性能
Abstract: Effects of Zn addition on the microstructure and mechanical properties of Mg-10Gd-4.8Y-0.6Zr(mass fraction/%,the same below)alloy during extrusion and following isothermal aging at 200℃ were investigated using digital micro-hardness testing,mechanical testing,optical microscopy(OM),scanning electron microscopy(SEM),transimission electron microscopy(TEM),X-ray diffraction(XRD).The results showed that Zn obviously refined grains of the alloy,and improved mechanical properties of the as-extruded alloys.In T5 condition the average grains of the alloy without Zn addition were about 25 μm;the average grains of the alloys with 1% Zn addition and 3% Zn addition were about 15 μm and 10 μm,respectively.For the alloy with 1% Zn addition in the-extruded and aged states,the values of tensile strength reached 337 MPa and 397 MPa,yield strength reached 128 MPa and 148 MPa,and the ductility rate reached 10.0% and 5.0% respectively,the better comprehensive properties were exhibited.
- Mg-10Gd-4.8Y-0.6Zr alloy /
- element Zn /
- extruded-aging /
- microstructure /
- mechanical properties

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参考文献(16)

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Zn含量对Mg-10Gd-4.8Y-0.6Zr合金组织和力学性能的影响

作者简介: 李慧中(1968- ),男,博士,副教授,(E-mail)lhz606@mail.csu.edu.cn.

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Effects of Zn Addition on Microstructure and Mechanical Properties of Mg-10Gd-4.8Y-0.6Zr Alloy

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作者简介:
李慧中(1968- ),男,博士,副教授,(E-mail)lhz606@mail.csu.edu.cn.