| 含稀土2090铝锂合金微观变形行为研究 |
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| 引用本文： | 赵志龙,张蓉,刘林,陈铮. 含稀土2090铝锂合金微观变形行为研究[J]. 材料科学与工艺, 2001, 9(3): 308-311 |
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| 作者姓名： | 赵志龙 张蓉 刘林 陈铮 |
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| 作者单位： | 西北工业大学机械系, |
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| 基金项目： | 西北工业大学校科研和教改项目，， |
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| 摘 要： | 本工作利用TEM技术对添加微量稀土铈的2090铝锂合金（200＋Ce)拉伸式中位错组态进行了观察，观察结果表明：2090＋Ce铝锂合金仍表现出较明显的共面滑移特征，所不同的是其滑移带比较细密均匀，并一具有交滑移特征，而普通2090铝锂合金中共面滑移带较粗而且带与带间距较宽，弱束暗场观察发现,在2090＋Ce铝锂合金试样的某些大角度晶界上存在较强的应变衬度，存在较强的局域应变倾向。
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| 关 键 词： | 2090铝锂合金 稀土元素 位错组态 铈 微观变形行为 |
| 文章编号： | 1005-0299(2001)03-0308-04 |
| 修稿时间： | 2001-03-07 |
Micro-deformation behaviors of A1-Li alloy 2090 containing element rare earth |
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| ZHAO Zhi long,ZHANG Rong,LIU Lin,CHEN Zheng. Micro-deformation behaviors of A1-Li alloy 2090 containing element rare earth[J]. Materials Science and Technology, 2001, 9(3): 308-311 |
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| Authors: | ZHAO Zhi long ZHANG Rong LIU Lin CHEN Zheng |
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| Abstract: | The dislocation microstructures in the tensile specimen of aluminium lithium alloys 2090 with addition of minor rare earth element cerium (2090+Ce) were investigated by means of TEM (electron transmission microscopy). The results show that characteristics of co planar slippage were obvious in alloy 2090+Ce, but its slipping strip is relatively denser and more uniform in comparison with common aluminium lithium alloy 2090, and the characteristics of join slippage in 2090+Ce were also observed. It was found that there were rather strong strain contrasts in vicinity of some big angle grain boundaries in the specimen of alloy 2090+Ce by the observation of weak beam dark field image, which manifested a strong tendency of local strain in this alloy. |
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| Keywords: | aluminium lithium alloy rare earth element cerium (Ce) dislocation microstructure |
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