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材料工程  2017, Vol. 45 Issue (7): 7-12    DOI: 10.11868/j.issn.1001-4381.2016.000248
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
2A66铝锂合金板材各向异性研究
张显峰1,2, 陆政1,2, 高文理3, 曹亚雷3, 冯朝辉1
1. 北京航空材料研究院, 北京 100095;
2. 北京市先进铝合金材料及应用工程技术研究中心, 北京 100095;
3. 湖南大学 材料科学与工程学院, 长沙 410082
Anisotropy of 2A66 Al-Li Alloy Sheet
ZHANG Xian-feng1,2, LU Zheng1,2, GAO Wen-li3, CAO Ya-lei3, FENG Zhao-hui1
1. Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2. Beijing Engineering Research Center of Advanced Aluminum Alloys and Applications, Beijing 100095, China;
3. College of Materials Science and Engineering, Hunan University, Changsha 410082, China
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摘要 采用布氏硬度与拉伸性能测试以及OM,SEM和TEM分析,研究2A66铝锂合金板材力学性能的各向异性随时效时间变化的规律和合金时效状态下的显微组织,并探讨影响各向异性的主要因素。结果表明:165℃峰值时效前,随时效时间的延长,2A66铝锂合金力学性能的各向异性程度逐渐下降,过时效后合金的各向异性有所增强,伸长率的各向异性大于强度各向异性。峰时效(64h)时合金的σbσ0.2δ的IPA值均达到了最低值,分别为3.0%,3.0%,12.2%,此时合金也获得了较好的强塑性结合,轴向σbσ0.2δ分别为526.5,448.9MPa,10.1%。不同热处理状态下,2A66铝锂合金平面各向异性的总体表现为:纵向(0°)和横向(90°)的强度最高,45°方向最低;45°方向试样的伸长率最高,纵向和横向最低。
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张显峰
陆政
高文理
曹亚雷
冯朝辉
关键词 2A66铝锂合金力学性能各向异性时效显微组织    
Abstract:The anisotropy and microstructures during aging treatment for 2A66 Al-Li alloy were studied by Brinell hardness, tensile testing, optical microscope(OM), scanning electron microscope(SEM) and transmission electron microscope (TEM). The main factors which influence the anisotropy of mechanical properties were discussed. The results indicate that, before 165℃ peak-aged, the anisotropy of the mechanical properties of the 2A66 Al-Li alloy decreases gradually with the extension of aging time. When the alloy is over-aged, the anisotropy of the alloy increases; the anisotropy of ductility is more serious than that of strength. The IPA values of σb, σ0.2 and δ of the alloy reach the lowest value at 3.0%, 3.0% and 12.2% respectively at the time of peak aging (64h), and the alloy is also obtained with good plasticity and axial tensile properties. σb, σ0.2 and δ of the alloy are 526.5, 448.9MPa, 10.1% respectively. Under different heat treatment conditions, the general behavior of the anisotropy of 2A66 Al-Li alloy is as follows: longitudinal (0°) and transverse (90°) have the highest strength, 45° direction is the lowest strength; 45° direction specimen has the highest elongation, vertical and horizontal direction has the minimum elongation.
Key words2A66 Al-Li alloy    mechanical property    anisotropy    aging treatment    microstructure
收稿日期: 2016-03-07      出版日期: 2017-07-21
中图分类号:  TG146.2  
通讯作者: 张显峰(1979-),男,硕士,高级工程师,从事高强铝合金方面的研究,联系地址:北京市81信箱2分箱(100095),E-mail:zhangxf0476@sohu.com     E-mail: zhangxf0476@sohu.com
引用本文:   
张显峰, 陆政, 高文理, 曹亚雷, 冯朝辉. 2A66铝锂合金板材各向异性研究[J]. 材料工程, 2017, 45(7): 7-12.
ZHANG Xian-feng, LU Zheng, GAO Wen-li, CAO Ya-lei, FENG Zhao-hui. Anisotropy of 2A66 Al-Li Alloy Sheet. Journal of Materials Engineering, 2017, 45(7): 7-12.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000248      或      http://jme.biam.ac.cn/CN/Y2017/V45/I7/7
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