7085铝合金的淬火敏感性

doi:10.11896/j.issn.1005-023X.2018.12.011

Abstract
Figure/Table
References
Related Citation (2)

Download:

Full Text ( PDF ) (3049KB)
Export: BibTeX | EndNote (RIS)

Abstract The time-temperature-transformation (TTT) curve and time-temperature-property (TTP) curve of 7085 aluminum alloy were determined by an interrupted quench technique. The microstructure transformation during isothermal treatment was stu-died by the transmission electron microscopy (TEM). Our experiment confirmed an electro-conductivity increasing trend and a hardness decreasing trend of the 7085 alloy during isothermal treatment, both of which change faster in the moderate temperature range. The nose temperatures of the TTT and TTP curves are about 320 ℃ and the high quench sensitive temperature ranges from 250 ℃ to 370 ℃. Microstructure observation indicated that the supersaturated solid solution decomposes and equilibrium η precipitates, and the precipitation rate reaches the highest value at about 320 ℃. η particles precipitate, agglomerate and grow as the isothermal treatment processes, which results in loss of solutes and decrease of the property. In the quench sensitive range, η particles’ rapid preci-pitation and growth can be attributed to high diffusion rate of solute atoms and large driving force of phase transformation.

Key words： 7085 aluminum alloy quench sensitivity TTT curve TTP curve

Published: 20 July 2018

CLC number:

TG146.2

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	XIAO Jing
	YI Youping
	CUI Jindong
	HUANG Shiquan

Cite this article:

XIAO Jing,YI Youping,CUI Jindong, et al. The Quench Sensitivity of 7085 Aluminum Alloy[J]. Materials Reports, 2018, 32(12): 1998-2002.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.011 OR http://www.mater-rep.com/EN/Y2018/V32/I12/1998

1 Liu Bing, Peng Chaoqun, Wang Richu, et al. Recent development and prospects for giant plane aluminum alloys[J]. Chinese Joumal of Nonferrous Metals,2010,20(9):1705(in Chinese).
刘兵,彭超群,王日初,等.大飞机用铝合金的研究现状及展望[J].中国有色金属学报,2010,20(9):1705.
2 James T S, John L, Jr Warren H H. Aluminum alloys for aero-structures[J]. Advanced Materials and Process,1997,152(4):17.
3 John L. Advanced aluminum and hybrid aerostructures for future aircraft[J]. Materials Science Forum,2006,519-521:1233.
4 Chakrabarti D J, Liu J, Sawtell R R, et al. New generation high strength high damage tolerance 7085 thick alloy product with low quench sensitivity[C]//Proceedings of ICAA 9. Melboume: Institute of Materials Engineering Australasia Ltd,2004:969.
5 Liu Zongchang. Quenching cracking and its prevention[J]. Heat Treatment,2010,25(3):72(in Chinese).
刘宗昌.淬火开裂及防止方法[J].热处理,2010,25(3):72.
6 Dai Wei. The reduction of quenching residual stress for 7A85 aluminum alloy joint die forging by mold compression[D]. Changsha: Central South University,2013(in Chinese).
代伟.模压法消减7A85铝合金接头模锻件淬火残余应力研究[D].长沙:中南大学,2013.
7 Fink W L, Wiley L A. Quenching of 75S aluminum alloy[J]. Ame-rican Institute of Mining and Metallurgical Engineers,1948,175:414.
8 Li Shenlan, Huang Zhiqi. Quenching sensitivity of 6351 aluminum alloy[J]. Transactions of Nonferrous Metals Society of China,2013,23:46.
9 Xiong Baiqing, Li Xiwu, Zhang Yongan, et al. Quench sensitivity of Al-Zn-Mg-Cu alloys[J]. Chinese Journal of Nonferrous Metals,2011,21(10):2631(in Chinese).
熊柏青,李锡武,张永安,等.Al-Zn-Mg-Cu合金的淬火敏感性[J].中国有色金属学报,2011,21(10):2631.
10 Zhang Zhihui. The study of quenching sensitivity of 7000 series aluminum alloys[D]. Beijing:General Research Institute for Nonferrous Metals,2014(in Chinese).
张智慧.7000系铝合金的淬火敏感性研究[D].北京:北京有色金属研究总院,2014.
11 Zhang Xinming, Liu Wenjun, Liu Shengdan, et al. Effect of rolling reduction on quench sensitivity of 7050 aluminum alloy[J]. Transactions of Materials and Heat Treatment,2010,31(6):33(in Chinese).
张新明,刘文军,刘胜胆,等.热轧变形量对7050铝合金淬火敏感性的影响[J].材料热处理学报,2010,31(6):33.
12 Zhang Xinming, Liu Shengdan, You Jianghai, et al. Influence of aging on quenching sensitivity effect of 7055 aluminum alloy[J].Chinese Journal of Nonferrous Metals,2007,17(2):260(in Chinese).
张新明,刘胜胆,游江海,等.时效对7055铝合金淬火敏感效应的影响[J].中国有色金属学报,2007,17(2):260.
13 Liu Wenjun. The research about the quench induced precipitation and quenching sensitivity of Al-Zn-Mg-Cu alloys[D]. Changsha:Central South University,2011(in Chinese).
刘文军.Al-Zn-Mg-Cu铝合金淬火析出行为及淬火敏感性研究[D].长沙:中南大学,2011.
14 Staley J T. Quench factor analysis of aluminum alloys[J]. Material Science and Technology,1987,3(11):923.
15 Conserv A M, Di Russo E, Caloni O. Comparison of the influence of chromium and zirconium on the quench sensitivity of Al-Zn-Mg-Cu alloys[J]. Metallurgical and Materials Transactions B,1971,2(4):1227.
16 Dumont M, Lefebvre W, Doisneau-Cottignies B. Characterisation of the composition and volume fraction of η′ and η precipitates in an Al-Zn-Mg alloy by a combination of atom probe, small-angle X-ray scattering and transmission electron microscopy[J]. Acta Materialia,2005,53(10):2881.
17 Burke J. The kinetics of phase transformation in metal[M]. London: Pergamon Press,1965.
18 Nagahama K, Miki I. Precipitation during recrystallization in Al-Mn and Al-Cr alloys[J]. Journal of Japan Institute of Light Metals,1974,15(3):185.
19 肖纪美.合金相与相变[M].北京:冶金工艺出版社,2004:310.