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合金元素的扩散, Al3Zr的析出, 难熔相的聚集和球化现象进行了解释. 根据实验及计算结果, 得出合理均匀化处理工艺为470℃均匀化24h. 关键词: 7A55合金; 均匀化动力学; 枝晶间距 中图分类号: TG113.12 文献标识码: A Homogenizing treatment of 7A55 alloy HE Yong-dong, ZHANG Xin-ming, YOU... during homogenization. According to the results of experiment and calculation, the proper homogenizing process of 7A55 alloy is at 470℃ for 24h. Key words: 7A55 alloy; homogenizing dynamics; dendrite arm......
, Jiangsu University of Science and Technology, Zhenjiang, 212003, China) Abstract: The microstructure and properties evolution of 7A55 aluminum alloy thick plate along the thickness direction were... the strength of the surface layer. Recrystallization and texture are the main factors of inhomogeneity in mechanical properties. Key words: 7A55 aluminum alloy; thick plate; inhomogeneity 近年来,航空工业中往往采用整......
标识码:A 文章编号:1672-7207(2007)01-0041-05 Effect of solution on fracture toughness of 7A55 aluminum alloy LIU Wen-hui, ZHANG Xin-ming, LI Hui-jie, LIU Sheng-dan, HUANG Zhen-bao (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The effect of solution on fracture toughness of 7A55 aluminum alloy......
Trans. Nonferrous Met. Soc. China 24(2014) 28-35 Rate controlling mechanisms in hot deformation of 7A55 aluminum alloy Di FENG1,2, Xin-ming ZHANG1,2, Sheng-dan LIU1,2, Ze-zheng WU1,2, Qi TAN1,2 1...), Central South University, Changsha 410083, China Received 3 December 2012; accepted 16 April 2013 Abstract: The hot deformation behavior of 7A55 aluminum alloy was investigated at the temperature ranging......
Trans. Nonferrous Met. Soc. China 24(2014) 2122-2129 Non-isothermal retrogression kinetics for grain boundary precipitate of 7A55 aluminum alloy Di FENG1,2, Xin-ming ZHANG1,2, Sheng-dan LIU1,2, Ze... process T(t) when the initial size of GBP r0 is given. Finally, the universal characterization method for the microstructure homogeneity along the thickness direction of 7A55 aluminum alloy thick plate......
: The effects of retrogression and reaging (RRA) treatment on the microstructure, tensile properties and resistance to SCC of a pre-stretched 7A55 aluminum alloy plate were studied by tensile test, slow.... Effect of solution treatment on microstructure and mechanical properties of 7A55 aluminum alloy [J]. Transactions of Materials and Heat Treatment, 2007, 28(1): 87-91. [11] 刘文辉, 张新明, 李惠杰, 刘胜胆, 黄振宝. 固......
and only little recrystallization happens. As a result, a better precipitation strengthening effect in subsequent aging is attained. Key words: 7A55 aluminum alloy; recrystallization; recovery; two... aluminum alloy ZHANG Xin-ming, HUANG Zhen-bao, LIU Sheng-dan, LIU Wen-hui, ZHANG Chong, DU Yu-xuan (School of Materials Science and Engineering, Central South University, Changsha 410083, China......
义成分 Table 1 Nominal composition of aluminum alloy 7A55 (mass fraction, %) 2 实验结果 2.1 合金的拉伸性能与电导率 表2所列为7A55合金在T651,T7651,T7451和T7351处理条件下的拉伸性能和电导率数据.对比表中的数据可以看出:在T651时效态,7A55合金强... treatments on microstructure and corrosion behavior of 7A55 alloy plate HE Zhen-bo1, 2, YAN Yan2, ZHONG Shen2, ZHENG Zi-qiao2 (1. Northeast Light Alloy Co., Ltd., Harbin 150060, China; 2. School......
号:1672-7207(2007)05-0789-06 Effect of pre-precipitation after solution on mechanical properties and corrosion resistance of aluminum alloy 7A55 ZHANG Xin-ming, ZHANG Xiao-yan, LIU Sheng-dan, LIU... Sample number of aluminum alloy 7A55 1.2 性能测试及组织观察 采用HV-10B硬度计测试样品硬度,载荷为29.4 N;用7501涡流电导仪测试样品的电导率.对每个样品的电导率测试3次,取平均值. 晶间腐蚀实验按照GB 7998-87标准进行.每个状态取平行试样3块,尺寸为25 mm×15 mm,先用金相砂纸打磨各面,并机械抛光.将样品垂直悬挂在......
in 7A55 cast alloy were studied by optical microscopy, scanning electron microscopy and energy dispersive spectrum(EDS). The results show that adding 0.04%Ti and 0.17%Zr can refine the grain.... Key words: 7A55 aluminium alloy; trace elements; grain refinement; nucleation 超高强Al-Zn-Mg-Cu合金因合金化程度高, 易产生枝晶偏析, 晶界共晶组织粗大, 导致熔铸成型困难, 热轧开坯易开裂. 添加微量元素细化合金的铸锭组织, 能够显著提高合金的强度, 断裂韧性, 改善合金的加......