| AZ31/SiCp复合材料的高应变速率超塑性(英文) |
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| 引用本文： | 陈培生,吕庆风,孙扬善,蒋建清,马爱斌.AZ31/SiCp复合材料的高应变速率超塑性(英文)[J].南京航空航天大学学报(英文版),2001,18(1). |
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| 作者姓名： | 陈培生 吕庆风 孙扬善 蒋建清 马爱斌 |
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| 作者单位： | 1. 南京航空航天大学无人机研究院
2. 东南大学材料科学与工程系 |
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| 基金项目： | 国家自然科学基金 (编号 :5 95 710 0 4)资助项目~~ |
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| 摘 要： | 在温度为 3 65～ 5 65℃和应变速率为 2 .0 8× 1 0 - 3～5 .2 1× 1 0 - 1 s- 1 的范围内 ,测试了 Si Cp/ AZ3 1镁基复合材料的超塑性。在温度为 5 2 5℃和应变速率大于 1 0 - 1 s- 1的条件下 ,得到延伸率 2 2 8%和应变速率敏感性指数 m>0 .3 ,温度提高到 5 40℃时在更高的应变速率 (5 .2 1× 1 0 - 1s- 1 )下得到延伸率 1 95 %。 Si Cp细化了复合材料基体组织 ,在超塑性试样断口上观察到了丝棒状物质。
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| 关 键 词： | 镁合金 SiC颗粒 复合材料 高应变率超塑性 |
HIGH STRAIN RATE SU PERPLASTICITY IN SiCp REINFORCED AZ31 MAGNESIUM MATRIX COMPOSITE |
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| Chen Peisheng,L Qingfeng,Sun Yangshan,Jiang Jianqing,Ma Aibin.HIGH STRAIN RATE SU PERPLASTICITY IN SiCp REINFORCED AZ31 MAGNESIUM MATRIX COMPOSITE[J].Transactions of Nanjing University of Aeronautics & Astronautics,2001,18(1). |
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| Authors: | Chen Peisheng L Qingfeng Sun Yangshan Jiang Jianqing Ma Aibin |
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| Institution: | Chen Peisheng L QingfengResearch Institute of Unmanned Aircraft,NU)29 Yudao Street,Nanjing 210016,P.R.ChinaSun Yangshan Jiang Jianqing Ma Aibin Department of Material Science and Engineering,S outheast University,Nanjing 210096,P.R.China |
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| Abstract: | Superplasticity of AZ31 magnesium matrix composites reinforced with 10 vol% SiC(2 μm) particulate is investigated at temperature range from 365℃ to 565℃ and strain rate from 2.08×10-3 to 5.21×10-1 s-1. The maximum total elongation of 228% is obtained at a strain rate of 2.08×10-1 s-1. The strain rate sensitivity exponent (m) higher than 0.3, is observed when the strain rate is higher than 10-1 s-1 at 525℃. Increasing the test temperature to 540℃, the maximum total elongation exceeding 195% is achieved at a higher strain rate of 5.21×10-1 s-1 than that at 525℃. SiC in AZ31/SiCp composite can fine the matrix grain size. Filament is observed on the fracture surface of the specimens showing superplasticity. |
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| Keywords: | magnesium alloys SiC p articulate composite high strain rate and superplasticity |
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