| 引用本文: | 陈贵清,傅高升,程超增.热变形参数对3003铝合金显微组织及硬度的影响[J].材料科学与工艺,2012,20(5):116-120.DOI:10.11951/j.issn.1005-0299.20120523. |
| CHEN Gui-qing,FU Gao-sheng,CHENG Chao-zeng.Effects of hot deformation parameters on microstructures and hardness of 3003 aluminum alloys[J].Materials Science and Technology,2012,20(5):116-120.DOI:10.11951/j.issn.1005-0299.20120523. |
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| 摘要: |
| 采用Gleeble-1500热模拟试验机对经高效熔体处理的3003铝合金进行变形温度为300℃～500℃,应变速率为0.01～10.0 s-1的等温压缩实验,建立了动态再结晶平均晶粒尺寸与变形温度和应变速率的三维关系图.通过显微维氏硬度测试表明,3003铝合金热变形后的显微硬度随应变速率的增大和变形温度的升高而降低,且显微维氏硬度随动态再结晶平均晶粒尺寸的减小而增大.TEM形貌像表明,当变形温度T≥400 ℃,应变速率ε·≥1.0 s-1时,合金中粗大的AlMnFe和AlMnSi第二相在铝基体中不均匀分布,在动态再结晶过程中起到了粒子促进形核作用.显微维氏硬度的变化与微观组织观察结果一致. |
| 关键词: 3003铝合金 平均晶粒尺寸 显微维氏硬度 粒子促进形核 显微组织 |
| DOI：10.11951/j.issn.1005-0299.20120523 |
| 分类号: |
| 基金项目:福建省自然科学基金资助计划项目(E0610004)；福建省教育厅A类科技项目(JA08249). |
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| Effects of hot deformation parameters on microstructures and hardness of 3003 aluminum alloys |
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CHEN Gui-qing1,2, FU Gao-sheng1,2, CHENG Chao-zeng1,2
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1.College of Materials Science and Engineering,Fuzhou University,Fuzhou 350108,China;2.Department of Mechanical Engineering,Fujian Chuanzheng Communications College,Fuzhou 350007,China
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| Abstract: |
| The isothermal and constant strain rate compression tests of 3003 aluminum alloys were conducted in the range of 300～500℃ and 0.01～10.0 s-1 by Gleeble-1500 thermal simulator.The plot of average recrystallization grain size,temperature and strain rate was built.The microhardness decreases with the strain rate and temperature increasing;furthermore the microhardness increases with the average recrystallization grain size decreasing.It is indicated by TEM images that the large and diffused precipitated phases AlMnFe and AlMnSi are distributed unevenly in the aluminum matrix in the conditions of T≥400 ℃ and ε·≥1.0 s-1,which play a role of particle stimulation on the nucleation (PSN)during the process of dynamic recrystallization (DRX).It is found that the microhardness changes are in good agreement with the results of microstructure observation. |
| Key words: 3003 aluminum alloy average grain size microhardness PSN microstructure |
