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and mechanical properties of Al-Zn-Mg-Cu based alloy HE Yong-dong, ZHANG Xing-ming, YOU Jiang-hai (School of Materials Science and Engineering, Central South University, Changsha 410083, China... by quenching (Q-PFZ).The alloys with addition of Cr, Mn, Ti, Zr have the strongest effect on the recrystallization of the Al-Zn-Mg-Cu alloys. Key words: Al-Zn-Mg-Cu alloy; trace element; microstructure......
of high pressure torsion(a) and forming part(b) 表1 Al-Zn-Mg-Cu合金主要化学成分 Table 1 Main chemical composition of Al-Zn-Mg-Cu alloy (mass fraction, %) 2 结果与分析 2.1 X射线衍射物相分析 图2所示为铸态和不.... 2 XRD patterns of Al-Zn-Mg-Cu alloy under HPT deformation 2.2 SEM像及成分分析 为了进一步分析Al-Zn-Mg-Cu合金中第二相在HPT变形过程中回溶与析出的变化规律,采用SEM和EDS对第二相形貌,数量和成分进行观察和表征.图3所示为铸态和不同变形温度,扭转圈数下HPT变形后Al-Zn-Mg-Cu合金的微观组......
Trans. Nonferrous Met. Soc. China 22(2012) 2638-2644 Precipitation behavior and properties of a new high strength Al-Zn-Mg-Cu alloy ZANG Jin-xin, ZHANG Kun, DAI Sheng-long Beijing Institute... precipitates are η phase when the ageing time prolongs to 24 h. Key words: Al-Zn-Mg-Cu alloy; precipitation; ageing; microstructure; hardness; strength; electrical conductivity 1 Introduction 7xxx series......
粉末热挤压Al-Zn-Mg-Cu系合金的热处理工艺 王少卿1,王海涛1,闵光辉1,张振亚1,于化顺1 (1.山东大学材料液固结构演变与加工教育部重点实验室,济南,250061) 摘要:通过XRD衍射分析,光学和透射电镜观察以及力学性能测试,研究了固溶和时效处理对粉末热挤压法制备的Al-Zn-Mg-Cu高强铝合金组织性能的影响.结果表明:挤压态合金中析出大量MgZn_2相;合金适宜的T6热处理制度为460℃×2.5h水冷+120℃×24h空冷;在此条件下合金的抗拉强度,屈服强度和伸长率分别为731MPa,670MPa和6.2%;晶粒细化是合金T6组织与铸锭挤压Al-Zn-Mg-Cu合金回归再时效(RRA)组织类似的主要原因. 关键词:粉末热挤压; Al-Zn-Mg-Cu合金; 微观组织; 力学性能; powder hot extrusion; Al-Zn-Mg-Cu......
the recovery process, significantly inhibits the recrystallization of Al matrix, thus enhances the resistance to stress corrosion and exfoliation corrosion. Compared with the Al-Zn-Mg-Cu alloy added with Zr, the complex additions of Zr, Cr and Pr into the Al-Zn-Mg-Cu alloy remarkably increase the fracture toughness (KⅠC) from 23.3 MPa?m1/2 to 29.3 MPa?m1/2, and enhance the resistance to stress corrosion......
strength enhancement of high Zn-containing Al-Zn-Mg-Cu alloys was mainly attributed to the high density nano-scale matrix precipitates. The SCC plateau velocity for the alloy with 11.0 wt.% Zn was about... mechanisms of different Zn-containing alloys were discussed based on fracture features, grain-boundary microchemistry, and electrochemical properties. Key words: Al-Zn-Mg-Cu alloy; stress corrosion cracking......
AlZnMgCu四元相,Al9FeNi相以及Al3Zr(L12) 弥散粒子. 关键词:喷射成形；均匀化处理；Al-Zn-Mg-Cu合金 中图分类号:TG 166.3 文献标志码:A Microstructural evolution of spray formed Al-9.97Zn-2.65Mg-1.94Cu-0.12%Zr alloy during...-formed; homogenization; Al-Zn-Mg-Cu alloy 7000系铝合金因其优良的性能广泛应用于航空航天领域.随着对材料性能......
and prospects of ultra strength Al-Zn-Mg-Cu aluminum alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2009, 14(6): 351-357. [7] SONG R G, DIETZAL W, ZHANG B J, et al. Stress... alloys were prepared by cast metallurgy. The effects of Zr, Ti and Cr additions on the microstructure and properties of Al-Zn-Mg-Cu alloy were compared to those of Zr and Ti additions by optical......
treatment. Key words: Al-Zn-Mg alloy; Al-Zn-Mg-Cu alloy; rare earth; Er; microstructure; aluminum alloy; refinement CLC number: TG111.7 Document code... on the structure of Al-Zn-Mg(-Cu) alloy, which coincides with the general effects laws of rare earth on the microstructure of aluminum alloys[11]. Whats more, the rare earth Er, as an active element, added......
of Materials Science and Engineering, Central South University, Changsha 410083, China Received 22 December 2014; accepted 13 April 2015 Abstract: Three Al-Zn-Mg-Cu alloys used for oil drill pipes (Alloy... content induce a decrease in the elongation of alloys. Key words: Al-Zn-Mg-Cu alloy; aging time; precipitate; microstructure; mechanical properties 1 Introduction Drill pipes are a kind of the main......
