| Improving fatigue property of Al-Li alloy by thermo-mechanical treatment |
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| 引用本文： | 丁剑,张荻,范同祥,吕维洁,覃继宁. Improving fatigue property of Al-Li alloy by thermo-mechanical treatment[J]. 中国有色金属学会会刊, 2003, 13(4) |
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| 作者姓名： | 丁剑 张荻 范同祥 吕维洁 覃继宁 |
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| 作者单位： | State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites，State Key Laboratory of Metal Matrix Composites Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China，Shanghai Jiaotong University，Shanghai 200030，China |
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| 基金项目： | Project (G199990 64 90 76)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgram,China |
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| 摘 要： | 1 INTRODUCTIONAl Lialloyhasbeenusedwidelyasakindofnewstructuralspaceflightmaterialdependingonitshighstrengthandlowdensity[1,2 ] .ManyresearchworkshavebeendoneonAl Lialloy[36 ] ,butfewofthemareaboutfatiguefaliure .Becausemorethan 80 %ofstructuralmaterials failuresarecausedbythefatiguefailuresdirectlyorindirectly[7,8] ,itisnecessarytostudythefatiguepropertyofAl Lialloy[911] .ThereisobviousageingstrengtheningeffectwhenAl Lialloyisagedbelowthesolubilitycurveoftransientphaseδ′ .However,t…
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Improving fatigue property of Al-Li alloy by thermo-mechanical treatment |
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| Abstract: | Tension compression fatigue test was performed to study the effect of the cold working + ageing treatment on the fatigue property of Al Li alloy under stress controlled condition. The main results show that: fatigue strength of specimen is improved obviously after cold working + ageing treatment; compared to the simple ageing treatment, the necessary ageing time can be reduced apparently to reach the peak ageing strengthening effect; the fatigue strength of specimen cut from the vertical direction to cold working direction is higher than that cut from the parallel direction. |
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| Keywords: | Al Li alloy thermo mechanical treatment fatigue property |
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