锻压技术

Zn含量对AlZnMgCu合金热变形流变应力行为的影响

英文标题：Influence of Zn content on flow stress behavior in the hot deformation for AlZnMgCu alloys

作者：左龙汤杰张辉

分类号：TG146.21

出版年,卷(期):页码：2018,43(5):0-0

摘要：

采用Gleeble-3500热模拟实验机，对3种不同Zn含量的AlZnMgCu合金进行等温单道次热压缩实验，变形温度为300~450 ℃，应变速率为0.01~10 s-1，分析了热变形流变应力和本构方程。结果表明：不同Zn含量的AlZnMgCu合金表现出相同的变化规律，流变应力随着变形程度的增加而显著升高，达到峰值应力后，逐渐趋于平稳。可用Zener-Hollmon函数形式来描述3种不同Zn含量的AlZnMgCu合金的流变应力行为，当Zn/Mg比大于3时，热变形激活能先随着Zn含量的增加而增加，然后保持不变。

The isothermal single pass hot compression experiments of three kinds of AlZnMgCu alloys with different percentages of Zn content were conducted by Gleeble3500 thermal simulation test machine, and the flow stress of hot compression deformation and constitutive equation were analyzed with deformation temperature of 300-450 ℃ and strain rate of 0.0110 s-1. The results show that AlZnMgCu alloys with different percentages of Zn content appear the same change rule, and the flow stress increases rapidly with the increasing of deformation degree. And then, it gradually becomes stable after reaching the peak stress. However, the flow stress behavior of AlZnMgCu alloys with different percentages of Zn content can be described by ZenerHollmon function. When the Zn/Mg ratio is greater than three，the activation energy hot deformation increases first and then remains the same with the increasing of Zn.

基金项目：

国家自然科学基金资助项目（51674111）

作者简介：左龙（1993-），男，硕士研究生 Email：1835470737@qq.com 通讯作者：张辉（1963-），男，博士，教授 Email: zhanghui63hunu@163.com

参考文献：

［1］Immarigeon J P，Holt R T，Koul A K，et al. Light materials for aircraft application
［J］. Materials Characterization，1995，35(1):41-67.

［2］李凤娇, 翟月雯, 边翊,等. 6061铝合金高温流变行为
［J］. 塑性工程学报, 2015,22(2):95-99.

Li F J, Zhai Y W, Bian Y,et al.Study of plastic deformation behavior on 6061 aluminum alloy
［J］. Journal of Plasticity Engineering, 2015,22(2):95-99.

［3］王小娜, 张辉. 5005铝合金热压缩变形行为
［J］. 锻压技术, 2017, 42(2):119-123.

Wang X L, Zhang H. Hot compression behavior of aluminum alloy 5005
［J］. Forging & Stamping Technology, 2017, 42(2):119-123.

［4］Srivatsan T S, Vasudevan S, Park L. The tensile deformation and fracture behavior of friction stir welded aluminum alloy 2024
［J］. Materials Science & Engineering A, 2007, 466(1-2):235-245.

［5］Hu H E, Yang L, Zheng L, et al. Relationship between boundary misorientation angle and true strain during high temperature deformation of 7050 aluminum alloy
［J］. Transactions of Nonferrous Metals Society of China, 2008, 18(4):795-798.

［6］赵业青，李岩，鲁法云，等.7150铝合金热变形行为及微观组织
［J］.航空材料学报，2015，35(3)：18-23.

Zhao Y Q，Li Y，Lu F Y，et al. Flow stress behavior and microstructure of 7150 aluminum alloy during heat deformation
［J］. Journal of Aeronautical Materials, 2015，35(3):18-23.

［7］Bai P，Hou X, Zhang X， et al. Microstructure and mechanical properties of a large billet of spray formed AlZnMgCu alloy with high Zn content
［J］.Materials Science & Engineering A，2009，508(1):23-27.

［8］Sharma M M，Amateau M F，Eden T J. Aging response of AlZnMgCu spray formed alloys & their metal matrix composites
［J］.Materials Science & Engineering A，2006，424（1）:87-96.

［9］Su J Q, Nelson T W, Mishra R, et al. Microstructural investigation of friction stir welded 7050-T651 aluminium
［J］. Acta Materialia, 2003, 51(3):713-729.

［10］Sellars C M, Mctegart W J. On the mechanism of hot deformation
［J］. Acta Metallurgica, 1966, 14(9):1136-1138.

［11］Mcqueen H J，Yue S， Ryan N D，et al. Hot working characteristics of steels in austenitic state
［J］. Journal of Materials Processing Technology，1995，53(1-2)：293-310.

［12］Mcqueen H J，Fry E，Belling J. Comparative constitutive constants for hot working of Al4.4Mg0.7Mn (AA5083)
［J］.Journal of Materials Engineering & Performance，2001，10(2)：164-172.

［13］Cerri E, Evangelista E, Forcellese A, et al. Comparative hot workability of 7012 and 7075 alloys after different pretreatments
［J］. Materials Science & Engineering A,1995, 197(2):181-198.

［14］Zenerc Hollmon J H. Effect of strainrate upon the plastic flow of steel
［J］. Journal of Applied Physics，1994，（1）:22-27.

［15］张坤.合金元素和热处理制度对高Zn超强铝合金微观组织和力学性能的影响
［D］.长沙:中南大学，2003.

Zhang K. Effects of Alloying Elements and Heat Treatment System on Microstructure and Mechanical Properties of High Strength Zn Super Aluminum Alloy
［D］.Changsha: Central South University， 2003.

［16］范红涛.合金元素与热处理工艺对AlZnMgCu系铝合金组织与力学性能研究的影响
［D］.长沙:中南大学，2003.

Fang H T. Effects of Alloying Elements and Heat Treatment System on Microstructure and Mechanical Properties of AlZnMgCu Aluminum Alloy
［D］.Changsha: Central South University，2003.

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