| 时效温度对Al-9.0at%Li合金反位原子缺陷的影响 |
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| 引用本文： | 张建军,张东博,薛志勇,张静,陈铮. 时效温度对Al-9.0at%Li合金反位原子缺陷的影响[J]. 稀有金属材料与工程, 2016, 45(5): 1220-1224 |
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| 作者姓名： | 张建军 张东博 薛志勇 张静 陈铮 |
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| 作者单位： | 华北电力大学,华北电力大学,华北电力大学,西北工业大学,西北工业大学 |
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| 基金项目： | 国家自然科学基金资助(项目号51301067); 中央高校基本科研业务费专项资金资助(项目号 2015MS46) |
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| 摘 要： | 应用微观相场法,计算Al-9.0at%Li合金沉淀相中的反位缺陷Al_(Li)和Li_(Al)随时效温度及时间变化的规律。结果表明,在相同的时效温度下,L12结构的Al_3Li相中反位缺陷Al_(Li)和Li_(Al)随时效时间的增加逐渐减小,且在富Al环境下Al_(Li)反位缺陷的浓度高于Li_(Al),在Al_3Li相中以Al_(Li)为主,同时存在少量的Li_(Al)。当时效温度发生变化时,时效温度越高,在Al_3Li相稳定形核后Li_(Al)、Al_(Li)反位缺陷的浓度越高。在达到平衡浓度前也具有这个特点,但是规律性并不显著。
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| 关 键 词： | Al-Li合金 反位缺陷 时效温度 |
| 收稿时间： | 2015-01-28 |
| 修稿时间： | 2015-08-24 |
Aged tempture infulence on antisite defect in Al-9.0at%Li alloy |
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| Zhang Jianjun,Zhang Dongbo,Xue Zhiyong,Zhang Jing and Chen Zheng. Aged tempture infulence on antisite defect in Al-9.0at%Li alloy[J]. Rare Metal Materials and Engineering, 2016, 45(5): 1220-1224 |
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| Authors: | Zhang Jianjun Zhang Dongbo Xue Zhiyong Zhang Jing Chen Zheng |
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| Affiliation: | Beijing Institute of Aeronautical Materials, Beijing 100095, China,Armor Technique Institute of PLA, Changchun 130117, China and Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | The microscopic phase-field method was employed to study the antisite defect in Al-9.0at%Li alloys with aged time and tempture. At the same aged tempture, the antistie defect AlLi and LiAl in Al3Li phase which is L12 structure gradually reduced as the aged time wore on. Under Al-rich condition, the concentration of AlLi antisite defect was higher than the the concentration of LiAl antisite defect. In Al3Li phase, the antistie defect was mainly about AlLi, and with a few of LiAl. Then the aging temperature changed, after Al3Li phase nucleation stable, with the tempture higher, the concentration of AlLi and LiAl antistie defect were higher. Also had the characteristics before the nucleation stable, but the regularity was not remarkable. |
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| Keywords: | Al-Li alloy antisite defect aged tempture |
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