| 非等温时效对一种铝锂合金力学性能与微观组织的影响 |
| |
| 引用本文： | 李劲风,陈永来.非等温时效对一种铝锂合金力学性能与微观组织的影响[J].稀有金属材料与工程,2017,46(1):183-188. |
| |
| 作者姓名： | 李劲风 陈永来 |
| |
| 作者单位： | 中南大学,航天材料及工艺研究所 |
| |
| 基金项目： | 国家高技术研究发展计划（863计划，项目号2013AA032401)，中南大学教师基金(项目号2013JSJJ 001) |
| |
| 摘 要： | 比较研究了一种Mg、Ag、Zn多元复合微合金化铝锂合金等温T8时效及非等温(降温)T8时效时的微观组织与力学性能。结果表明,该铝锂合金主要时效强化相为T1相(Al_2Cu Li),同时还存在θ相(Al_2Cu)及δ相(Al_3Li)的补充强化作用。相比于等温T8时效而言,降温T8时效可在不降低延伸率的同时,提高铝锂合金的强度。另外,降温T8时效时T1相析出及生长速度较慢,而且峰时效时θ相及δ相含量较高,补充强化作用更大。
|
| 关 键 词： | 铝锂合金 力学性能 微观组织 等温T8时效 非等温T8时效 |
| 收稿时间： | 2014/10/9 0:00:00 |
| 修稿时间： | 2014/11/17 0:00:00 |
Influence of non-isothermal aging on mechanical properties and microstructures of an Al-Li alloy |
| |
| Li Jin-feng and Chen Yong-lai.Influence of non-isothermal aging on mechanical properties and microstructures of an Al-Li alloy[J].Rare Metal Materials and Engineering,2017,46(1):183-188. |
| |
| Authors: | Li Jin-feng and Chen Yong-lai |
| |
| Affiliation: | Central South University,Aerospace Research Institute of Materials and Processing Technology |
| |
| Abstract: | The mechanical properties and micro-structures of a Mg, Ag and Zn multi-microalloyed Al-Li alloy with isothermal T8 aging and non-isothermal (cooling) T8 aging were studied. The results showed that the main strengthening precipitates were T1 (Al2CuLi), some ?? (Al2Cu) and ??(Al3Li) precipitates played a supplementary strengthening effect. Compared to the isothermal T8 aging, the cooling T8 aging enhanced the Al-Li alloy strength but did not lower its elongation. In addition, the precipitation and growth of T1 precipitates were slower during cooling T8 aging process due to its lowered temperature. Meanwhile, the fraction of ?? and ?? precipitates were higher in the alloy with cooling T8 peak aging, which caused a higher supplementary strengthening effect. |
| |
| Keywords: | Al-Li alloy Mechanical property Micro-structure Isothermal T8 aging Non-isothermal T8 aging |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
