| 喷射沉积5083 Al-Mg合金的超塑性 |
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| 引用本文： | 杨守杰 李树索 戴圣龙 韩雅芳. 喷射沉积5083 Al-Mg合金的超塑性[J]. 中国航空学报, 2004, 17(1): 47-52. DOI: 10.1016/S1000-9361(11)60202-1 |
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| 作者姓名： | 杨守杰 李树索 戴圣龙 韩雅芳 |
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| 作者单位： | Beijing Institute of Aeronautical Materials，School of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing Institute of Aeronautical Materials，Beijing Institute of Aeronautical Materials Beijing100095，China，Beijing100083，China，Beijing100095，China，Beijing100095，China，School of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing100083，China |
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| 基金项目： | NationalNaturalScienceFoundationofChina (5 98810 0 5 ) |
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| 摘 要： | 研究了喷射沉积再经过热变形处理的 5 0 83Al Mg合金的超塑性。喷射沉积 5 0 83Al Mg合金的微观组织是由平均尺寸 15 μm的等轴晶组成 ,组织中的气孔率为 0 1% 5 % (体积百分数 )。采用了两种不同的热变形处理工艺 (TMP)来闭合气孔和细化晶粒 :先挤压后轧制和直接轧制。采用先挤压后轧制工艺处理的合金表现出了相对较高的超塑性 ,最大超塑延伸率可达 4 6 5 % ,而采用直接轧制工艺处理的合金最大超塑延伸率为 2 95 %。两种工艺处理后的合金表现出了相似的应力 -应变行为和应变速率敏感因子 ,应变速率敏感因子取值范围为 0 3 0 5。超塑延伸率的差异可能是由闭合气孔导致的变形过程中空洞的形核能力不同造成的。
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| 关 键 词： | 超塑性 喷射沉积 5083Al-Mg合金 热变形处理 微观组织 |
| 收稿时间： | 2003-02-21 |
Superplasticity of Spray Deposited 5083 Al-Mg Alloy |
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| YANG Shou-jie,LI Shu-suo,DAI Sheng-long,HAN Ya-fang. Superplasticity of Spray Deposited 5083 Al-Mg Alloy[J]. Chinese Journal of Aeronautics, 2004, 17(1): 47-52. DOI: 10.1016/S1000-9361(11)60202-1 |
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| Authors: | YANG Shou-jie LI Shu-suo DAI Sheng-long HAN Ya-fang |
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| Affiliation: | YANG Shou-jie~1,LI Shu-suo~2,DAI Sheng-long~1,HAN Ya-fang~ |
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| Abstract: | The superplasticity of spray deposited and thermomechanical processed 5083 Al-Mg alloy is investigated in this paper. The results show that spray deposited 5083 A1 exhibits an equiaxed grain morphology with an average size of 15μm and porosity in the range of 0.1 vol. % to 5 vol. %. Two distinct TMP procedures are employed to close porosity and refine grain size: extrusion plus rolling and direct rolling. The material processed using the former method exhibits a relatively high superplasticity with a maximum superplastic elongation of 465%, whereas that processed using the latter method exhibits a maximum superplastic elongation of 295%. Materials processed using extrusion plus rolling and direct rolling both exhibit similar stress-strain behavior and strain rate sensitivity factors. The strain rate factors are in the 0.3 to 0.5 range. The difference in their superplastic elongation is possibly the result of differences in grain size and available cavity nucleation sites provided by closed gas pores. |
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| Keywords: | superplasticity spray deposition 5083 Al-Mg alloy thermomechanical process (microstructure) |
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