挤压AM50(-Ca)镁合金的显微组织与力学性能研究
Microstructure and mechanical properties of As-extruded AM50(-Ca)
查看参考文献11篇
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文摘
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研究了挤压AM50(-Ca)镁合金的微观组织和力学性能.研究发现添加钙在AM50合金中生成新的Al_2Ca相,并细化合金的晶粒尺寸.大于2wt.%的钙使铸态AMS0的晶粒尺寸从200 μm减小到40 μm,使挤压态AM50的晶粒尺寸从15 μm减小到7.5 μm.含钙量较少时,晶粒内仍含有少量的Mg_(17)Al_(12)相,Al_2Ca相主要分布在晶界;含钙量多于2wt.%时,合金中的Mg_(17)Al_(12)完全消失,除晶界处的Al_2Ca相外,在晶粒内部出现大量的针状Al_2Ca相.加钙提高了AM50合金的低温抗拉强度,同时在所有试验温度下合金的屈服强度得到提升. |
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其他语种文摘
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The effects of Ca addition on the microstructure and mechanical properties of the extruded AM50 magnesium alloy have been studied. The results show thai the Ca addition can reduce the quantity of Mg_(17)Al_(12)phase and form a new Al_2Ca phase distributing along grain boundaries. When Ca is added with an amount of more than 2wt. % , needle -shaped Al_2Ca precipitates are observed inside grain interiors, and the grain sizes of both as -cast and as - extruded AM50 alloy are decreased from 200μm and 15μm to 40μm and 7.5μm, respectively. It is found that the yield strength of the extruded AM50 alloy are improved with increasing Ca content in the studied temperature range, while the improvement in ultimate strength can be observed only at low temperature. |
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来源
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材料科学与工艺
,2007,15(1):141-144 【核心库】
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关键词
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M50
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Ca
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变形镁合金
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显微组织
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拉伸性能
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地址
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1.
大连理工大学,材料工程系, 辽宁, 大连, 116023
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中国科学院金属研究所, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-0299 |
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学科
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金属学与金属工艺 |
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基金
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国家863计划
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辽宁省博士启动基金
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文献收藏号
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CSCD:2809270
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