| Y 对8090Al-Li 合金拉伸性能和断裂行为的影响 |
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| 引用本文： | 桂全红,马禄铭,蒋晓军,梁国军,李依依.Y 对8090Al-Li 合金拉伸性能和断裂行为的影响[J].材料研究学报,1993,7(5):396-400. |
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| 作者姓名： | 桂全红 马禄铭 蒋晓军 梁国军 李依依 |
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| 作者单位： | 中国科学院金属研究所
(桂全红，马禄铭，蒋晓军，梁国军)，中国科学院金属研究所(李依依) |
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| 基金项目： | 国家自然科学基金,59071019 |
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| 摘 要： | 研究了两种不同 Y 含量对8090Al-Li 合金拉伸性能及断裂行为的影响。实验表明:加入0.1wt-%Y 可在不降低强度的情况下提高合金的塑性,加入0.5wt-%Y 可在不降低塑性的情况下提高合金的强度。在峰值时效条件下,不加 Y 的合金断裂为穿晶韧窝型和沿晶塑性混合方式,并伴有沿晶二次裂纹,加0.1%Y 不改变合金断裂模式,但使沿晶成分减少;加0.5%Y 合金则发生快速剪切断裂。本文从晶粒结构角度对断裂行为提出了解释。
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| 关 键 词： | A—Li 合金 稀土元素 Y 拉伸性能 沿晶断裂 穿晶断裂 |
| 收稿时间： | 1993-10-25 |
| 修稿时间： | 1993-10-25 |
EFFECT OF Y ON TENSILE PROPERTIES AND FRACTURE BEHAVIOR OF 8090 Al-Li ALLOY |
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| GUI Quanhong MA Luming JIANG Xiaojun LIANG Guojun LI Yiyi.EFFECT OF Y ON TENSILE PROPERTIES AND FRACTURE BEHAVIOR OF 8090 Al-Li ALLOY[J].Chinese Journal of Materials Research,1993,7(5):396-400. |
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| Authors: | GUI Quanhong MA Luming JIANG Xiaojun LIANG Guojun LI Yiyi |
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| Affiliation: | GUI Quanhong MA Luming JIANG Xiaojun LIANG Guojun LI Yiyi (Institute of Metal Research,Chinese Academy of Sciences) |
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| Abstract: | The effect of various content(0.1 and 0.5 wt-%)of rare earth element Y on ten-sile properties and fracture behavior of 8090 Al-Li alloy has been studied.The results show thathigher ductility can be obtainted by 0.1% Y addition and the strength does not reduce;higherstrength can be obtained by 0.5% Y addition and the ductility does not reduce.In peak agedcondition,the alloy with Y-free or 0.1% Y shows mixture fracture mode of ductileintergranular and transgranular with dimples.When 0.5% Y is added,the fracture of alloymakes a feature of shear-type transgranular.The relation between grain structure and fracturebehavior has also been discussed in this paper. |
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| Keywords: | Al-Li alloy rare earth element Y tensile properties intergranular fracture transgranular fracture |
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