| Limit of structure refinement for 7075 aluminum alloy at elevated temperature by hot deformation |
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| 引用本文： | 张小明,张廷杰,马光来,田锋,李中奎,周廉. Limit of structure refinement for 7075 aluminum alloy at elevated temperature by hot deformation[J]. 中国有色金属学会会刊, 2003, 13(3) |
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| 作者姓名： | 张小明 张廷杰 马光来 田锋 李中奎 周廉 |
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| 作者单位： | Northwest Institute for Nonferrous Metal Research，Northwest Institute for Nonferrous Metal Research，Northwest Institute for Nonferrous Metal Research，Northwest Institute for Nonferrous Metal Research，Northwest Institute for Nonferrous Metal Research，Northwest Institute for Nonferrous Metal Research Xi′an 710016，China，Xi′an 710016，China，Xi′an 710016，China，Xi′an 710016，China，Xi′an 710016，China，Xi′an 710016，China |
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| 摘 要： | 1 INTRODUCTIONThedeformationrefinementofmetalmicrostruc tureincludesmeaningsintwoaspects :firstly ,refinetheinitialcoarsegrainstructure ,fromscoresofmi crometertoahundredmicrometer,tofinesubgrain ;thentrytomaintainthefinedeformedsubgrainstruc tureinthefollowinghotworkingorheattreatmentprocessing .Experimentsprovethattheperformanceofcommercialalloyscanbeimprovedgreatlybyse vereplasticdeformation ,whichrefinesgrainofmet alstoseveralmicrometerorsub micrometerrange[18] .For 70 75aluminumalloy…
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Limit of structure refinement for 7075 aluminum alloy at elevated temperature by hot deformation |
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| ZHANG Xiao ming,ZHANG Ting jie,MA Guang lai,TIAN Feng,LI Zhong kui,ZHOU Lian. Limit of structure refinement for 7075 aluminum alloy at elevated temperature by hot deformation[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(3) |
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| Authors: | ZHANG Xiao ming ZHANG Ting jie MA Guang lai TIAN Feng LI Zhong kui ZHOU Lian |
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| Abstract: | Performance of commercial alloys can be improved greatly by severe plastic deformation, which refines grain of metals to several micrometer or sub-micrometer order. During severe plastic deformation, the final size of grain structure depends on the following factors: strain rate, total strain, deformation temperature and so on. Under a certain condition, structure cannot be infinitely refined, which means that the size of grain has a limit with the increase of total strain. Under conventional hot deformation temperature, the grain size of 7075 aluminum alloy can be refined to 1-2 μm, and it will not become smaller with the increase of total strain, that is to say, the limit of grain refinement is about 1 μm. |
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| Keywords: | 7075 aluminum alloy deformation refinement ultra fine grains |
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