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| 7055铝合金单级时效微观结构演变的透射电镜研究 | |
| 引用本文： | 沈凯,尹志民,王涛.7055铝合金单级时效微观结构演变的透射电镜研究[J].南京航空航天大学学报(英文版),2007,24(3):265-269. |
| 作者姓名： | 沈凯 尹志民 王涛 |
| 作者单位： | 1. 中南大学材料科学与工程学院,长沙,410083,中国;南京航空航天大学材料科学与技术学院,南京,210016,中国 2. 南京航空航天大学材料科学与技术学院,南京,210016,中国 3. 东北轻合金有限责任公司,哈尔滨,150060,中国 |
| 基金项目： | 中南大学校科研和教改项目 |
| 摘 要： | 采用透射电子显微镜对固溶单级时效处理7055铝合金中的沉淀相进行了研究.在较短的时效时间里,可以观察到GP区在111]面上形成,随着时效时间增加,GP区逐渐长大.η＇亚稳相在120℃时效4 h的时候被发现,它与基体的取向关系是0 0 0 1]η＇//1 (1) 1]Al及(1 0 (1) 1)η＇//(1 1 0)Al.在时效达到24 h时,η相便析出,它们与基体存在(1) 1 0 0]η//1 1 0]Al及(0 0 0 1)η//(1 1 1)Al的取向关系.由于η＇亚稳相和η相颗粒的密度相比于区而言较小,所以GP区对提高该时效合金的强度和硬度起至关重要的作用. |
| 关 键 词： | 7055铝合金 时效 透射电子显微镜 7055 aluminum alloys ageing TEM 铝合金 单级时效 微观结构演变 透射 电镜研究 ALUMINUM ALLOYS DEVELOPMENT control properties particles lower zone density starts orientation relationship matrix phase sample aged short |
| 文章编号： | 1005-1120（2007）03-0265-05 |
| 修稿时间： | 2006-10-11 |
TEM STUDY ON MICROSTRUCTURAL DEVELOPMENT OF SINGLE-AGEING 7055 ALUMINUM ALLOYS |
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| Shen Kai,Yin Zhimin,Wang Tao.TEM STUDY ON MICROSTRUCTURAL DEVELOPMENT OF SINGLE-AGEING 7055 ALUMINUM ALLOYS[J].Transactions of Nanjing University of Aeronautics & Astronautics,2007,24(3):265-269. | |
| Authors: | Shen Kai Yin Zhimin Wang Tao |
| Institution: | 1. School of Material Science and Engineering, Central South University, Changsha, 410083, P. R. China; 2. College of Material Science and Engineering, NUAA, 29 Yudao Street, Nanjing, 210016, P. R. China; 3. Northeast Light Alloy Co. Ltd. , Harbin, 150060, P. R. China |
| Abstract: | Microstructural development of a commercial 7055 (Al-Zn-Mg-Cu)alloy is studied by transmission electron microscope(TEM) during the process of single-ageing for up to 48 h. It is observed that Guinier-Preston (GP) zones are formed on 111] planes when the sample is aged for a short time and grows up gradually with increase of ageing time. Η＇ phase is formsed after ageing for 4 h at 120℃, having the orientation relationship with the matrix as0 0 0 1]η＇//1 (1) 1]Al and (1 0 (1) 1)η＇//(1 1 0)Al.η phase starts to occur after 24 h ageing and has an orientation relationship with matrix as (1) 1 0 0]η//1 1 0]Al and (0 0 0 1)η//(1 1 1)Al. Since the density of both η' phase and η phase particles is much lower than that of GP zone on aged alloy, GP zones are important to control the properties of the alloy. |
| Keywords: | 7055 aluminum alloys ageing TEM |
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