TTT Curves and Quench Sensitivity of 2A14 Aluminum Alloy
DONG Fei1,2, YI Youping1,2, HUANG Shiquan1,2, ZHANG Yuxun1,2
1 State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083; 2 School of Mechanical and Electrical Engineering, Central South University, Changsha 410083
Abstract: Quenching sensitivity of 2A14 aluminum alloy was determined by time-temperature-transformation (TTT) curve, which was carried out by an interrupted quench method. XRD,TEM and EDS were applied to investigate the microstructure of 2A14 aluminum alloy, and the isothermal phase transformation kinetics were studied by Avrami equation. The results showed that the nose temperature of TTT curve was 350 ℃ and the quench sensitive temperature range was 300-400 ℃. In addition, the supersaturated solid solution decomposed and precipitated quickly at 350 ℃, due to higher degree of supersaturation and fast diffusion rate. Furthermore, this work suggests that for 2A14 aluminum alloy, residual stress and mechanical properties can be balanced by increasing coo-ling rate within quenching sensitivity range (300-400 ℃) and reducing cooling rate in other temperature ranges.
1 Zhang H, Wang M, Zhang X, et al. Microstructural characteristics and mechanical properties of bobbin tool friction stir welded 2A14-T6 aluminum alloy[J]. Mater Des,2015,65:559. 2 Qin H, Zhang H, Sun D, et al. Corrosion behavior of the friction-stir-welded joints of 2A14-T6 aluminum alloy[J]. Int J Miner Me-tall Mater,2015,22(6):627. 3 Dumont D, Deschamps A, Brechet Y. On the relationship between microstructure, strength and toughness in AA7050 aluminum alloy[J]. Mater Sci Eng A,2003,356(1-2):326. 4 Liu Chunyan, Qiu Yilun, Li Changan.Factors influencing mechanical properties of 2A14 aluminium alloy forging[J]. Heat Treatm,2009(6):46(in Chinese). 刘春燕,邱义伦,李昌安. 影响2A14铝合金锻件力学性能的因素[J]. 热处理,2009(6):46. 5 Ou B L, Yang J G, Wei M Y. Effect of homogenization and aging treatment on mechanical properties and stress-corrosion cracking of 7050 alloys[J]. Metall Mater Trans A,2007,38:1760. 6 Wang H, Yi Y, Huang S. Investigation of quench sensitivity of high strength 2219 aluminum alloy by TTP and TTT diagrams[J]. J Alloys Compd,2017,690:446. 7 Liu Chunyan,Zhou Danchen,Li Changan, et al. Heat treatment of 2A14 aluminium alloy forgings[J]. Heat Treat Met,2011(9):42(in Chinese). 刘春燕,周丹晨,李昌安,等. 2A14铝合金锻件的热处理工艺[J]. 金属热处理,2011(9):42. 8 Liu Wensheng, Liu Dongliang, Ma Yunzhu, et al.Effects of deformation temperature on microstructure and mechanical properties of 2A14 aluminum alloy[J]. Chin J Nonferr Met,2015(2):308(in Chinese). 刘文胜,刘东亮,马运柱,等. 变形温度对2A14铝合金显微组织和力学性能的影响[J]. 中国有色金属学报,2015(2):308. 9 Zohrabyan D, Milkereit B, Schick C, et al. Continuous cooling precipitation diagram of high alloyed Al-Zn-Mg-Cu 7049A alloy[J]. Trans Nonferr Met Soc China,2014,24(7):2018. 10 Li S, Huang Z, Chen W, et al. Quench sensitivity of 6351 aluminum alloy[J]. Trans Nonferr Met Soc China,2013,23(1):46. 11 Li Hongying, Tang Yi, Zeng Zaide, et al. Testing of continuous cooling transformation curve of Al-Zn-Mg-Cu alloy[J]. Chin J Nonferr Met,2008(9):1613(in Chinese). 李红英,唐宜,曾再得,等. Al-Zn-Mg-Cu合金连续冷却转变曲线的测量[J]. 中国有色金属学报,2008(9):1613. 12 Li Hongying , Wang Xiaofeng, Tang Yi, et al. Measurement of continuous cooling transformation curves of 7A04 aluminum alloy[J] .Chin J Nonferr Met,2010(4):640(in Chinese). 李红英,王晓峰,唐宜,等. 7A04铝合金连续冷却转变曲线的测定[J]. 中国有色金属学报,2010(4):640. 13 Wang Gang,Yin Zhimin,Zhao Kai, et al. TTT curves of 6082 aluminum alloy and its application[J]. Mater Sci Technol,2011(4):84(in Chinese). 王岗,尹志民,赵凯,等. 6082铝合金的TTT曲线及其研究[J]. 材料科学与工艺,2011(4):84. 14 Li Shenlan, Huang Zhiqi, Chen Weiping, et al. TTT curves of an Al-Mg-Si-Mn alloy[J]. Trans Mater Heat Treat,2013,34(4):57(in Chinese). 李慎兰,黄志其,陈维平,等.Al-Mg-Si-Mn合金的TTT曲线[J].材料热处理学报,2013,34(4):57. 15 Davydov V G, Ber L B, Kaputkin E Y, et al. TTP and TTT diagrams for quench sensitivity and ageing of 1424 alloy[J]. Mater Sci Eng A,2000,280(1):76. 16 Meng Fuxin. The aging behavior and mechanical properties of deformed 2A14 aluminium alloys[D].Harbin: Harbin Institute of Technology,2013(in Chinese). 孟富新. 形变2A14铝合金的时效析出行为和力学性能[D]. 哈尔滨:哈尔滨工业大学,2013. 17 Ye Mao, Meng Fuxin, Zhang Xun, et al. Effect of aging on microstructure of 2A14 aluminum alloy under small amount of cold deformation[J].Heat Treat Met,2014(8):44(in Chinese). 叶茂,孟富新,张训,等. 时效对小变形量2A14铝合金微观组织的影响[J]. 金属热处理,2014(8):44. 18 Zhang Xinming,Liu Wenjun,Liu Shengdan, et al. TTP curve of aluminum alloy 7050[J].Chin J Nonferr Met,2009(5):861(in Chinese). 张新明,刘文军,刘胜胆,等. 7050铝合金的TTP曲线[J]. 中国有色金属学报,2009(5):861. 19 Li Peiyue, Xiong Baiqing, Zhang Yongan,et al. Hardenability cha-racteristic and microstructure of 7050 Al alloy[J].Chin J Nonferr Met,2011(3):513(in Chinese). 李培跃,熊柏青,张永安,等. 7050铝合金淬火特性与微观组织[J].中国有色金属学报,2011(3):513. 20 Song Shaojie.Kinetics and thermodynamics for diffusional phase transformations in the solid state[D].Xi’an: Northwestern Polytechnical University,2014(in Chinese). 宋韶杰. 扩散型固态相变动力学与热力学研究[D].西安:西北工业大学,2014.
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2017, Vol. 31 
