| Effect of Yttrium on Microstructures and Properties at Elevated Temperature of Mg-0.8Zr-0.35Zn Alloys |
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| 作者姓名： | 梁维中 宁志良 王海波 刘洪德 刘洪汇 |
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| 作者单位： | School of Metal Materials，Harbin University of Science and Technology，Harbin 150040，China，School of Metal Materials，Harbin University of Science and Technology，Harbin 150040，China，School of Metal Materials，Harbin University of Science and Technology，Harbin 150040，China，Harbin Dongan Autoengine Joint-Stock Co. Ltd，Harbin 150056，China，Harbin Dongan Autoengine Joint-Stock Co. Ltd，Harbin 150056，China |
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| 基金项目： | ProjectsupportedbytheHarbinCityYouthFoundation ( 2 0 0 2AFQXJ0 3 1)，ProjectsupportedbyHeiLongjiangProvinceEdu
cationFoundation ( 10 5 3 10 5 0 ) |
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| 摘 要： | Asthelighteststructuralmetalmaterial ,themostobviousadvantagesofmagnesiumalloyaretheirhighspecificstrengthandspecificstiffness ,superdampingcapacityandmachinability ,excellentelectromagneticshieldingandnon toxicity .Theincreasingattentionhasbeenpaidonthepracticalapplicationofmagne siumalloysastheenergysavingandenvironmentpro tectionarebecomingtheworldfocus .However ,somedisadvantagessuchasignitableandcombustibledur ingmeltingandcastingandtheirrelativelypoorprop ertiesatelevatedtemperaturelimit…
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| 关 键 词： | 钇 高温结构材料 镁合金 显微结构 机械性能 稀土 |
Effect of Yttrium on Microstructures and Properties at Elevated Temperature of Mg-0.8Zr-0.35Zn Alloys |
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| Liang Weizhong ,Ning Zhiliang ,Wang Haibo ,Liu Hongde ,Liu Honghui.Effect of Yttrium on Microstructures and Properties at Elevated Temperature of Mg-0.8Zr-0.35Zn Alloys[J].Journal of Rare Earths,2004,22(2):268-271. |
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| Authors: | Liang Weizhong Ning Zhiliang Wang Haibo Liu Hongde Liu Honghui |
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| Affiliation: | Liang Weizhong 1,Ning Zhiliang 1,Wang Haibo 1,Liu Hongde 2,Liu Honghui 2 |
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| Abstract: | The effects of Y addition on microstructures and properties of as-cast and solid solutioning and aging treated Mg-0.8Zr-0.35Zn alloys at elevated temperature(250 ℃)were investigated by the use of XJG-04 optical microscopy,JCXA-733 electron probe,D/max-rB X-ray diffractometer(XRD)and WDW-200 electronic universal material testing machine.The results show that the microstructures of as-cast and heat treated Mg-0.8Zr-0.35Zn alloys with Y addition are refined and a new phase,Mg24Y5,is formed.At 250 ℃,the strength at elevated temperature of the alloys increases with increasing amount of Y addition,but relative elongation and area reduction decreases.The tendency of brittle fracture of fractured surface at elevated temperature is enlarged and fracture is changed from ductile into cleavage. |
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| Keywords: | metal materials microstructures elevated temperature properties rare earth metal |
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