MATERIALS AND MATRIX COMPOSITES |
|
|
|
|
|
Effects of Deformation Temperature on Microstructure and Mechanical Properties of 2A14 Aluminum Alloy |
TONG Dengliang1,2, YI Youping1,2,3, HUANG Shiquan2,3, HE Hailin1,2, GUO Wanfu1,2, WANG Bingxiang2,3
|
1 Light Alloy Research Institute, Central South University, Changsha 410083, China; 2 State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China; 3 School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China |
|
|
Abstract Aiming at the problems of coarse grains and second phase aggregation in the manufacture of large 2A14 aluminium alloy high cylinder parts, a new warm rolling process for high cylinder parts was proposed in this paper. The effects of hot and warm rolling on the microstructure and mechanical properties of 2A14 aluminum alloy were studied by using optical microscope (OM), scanning electronic microscopy (SEM), transmission electron microscopy (TEM) and tensile test. The results show that the comprehensive mechanical properties of 2A14 aluminium alloy can be significantly improved by warm rolling at 200 ℃ combined with heat treatment compared with that of hot rolling at 480 ℃. The tensile strength, yield strength and elongation of 2A14 aluminum alloy can reach 464 MPa, 386 MPa and 9.3%, respectively. A large amount of storage energy accumulated in the form of high density dislocation during warm rolling promotes the nucleation rate of recrystallization during solution process and refines dramaticly grain size. Meanwhile, warm rolling combined with heat treatment can fully break up and dissolve the coarse second-phase compounds in the alloy, improve their non-uniform distribution in the matrix, and promote the precipitation of S′ phase, the main strengthening phase of 2A14 aluminum alloy.
|
Published: 12 March 2020
|
|
Fund:This work was financially supported by the Strategic Rocket Innovation Foundation (Y18122), the National Natural Science Foundation of China (51875583), the State Key Laboratory of High Performance Complex Manufacturing Foundation of China (ZZYJKT2018-03). |
About author:: Dengliang Tongborn in 1995, majored in mechanical engineering from Light Alloy Research Institute of Central South University. Mainly engaged in the research of forming process of aluminium alloy forgings; Youping Yi is a doctoral tutor and a professor at the School of Mechanical and Electrical Engineering of Central South University, mainly engaged in the research of aerospace and aerospace light alloy component forming processes and molds, heat treatment processes and equipment. |
|
|
1 Shao S G, Yang Z X, Xing G N, et al. Astronautical Systems Eingeering Technology, 2017, 1 (3), 24 (in Chinese). 邵世刚, 杨泽萱, 邢冠楠, 等. 宇航总体技术, 2017, 1 (3), 24. 2 Wang J, Lu Y L, Zhou D S, et al. Heat Treatment of Metals, 2018, 43 (1), 231 (in Chinese). 王健, 卢雅琳, 周东帅, 等. 金属热处理, 2018, 43 (1), 231. 3 Zhou Y H, Zhang Y L, Jing T, et al. Journal of Projectiles, Rockets, Missiles and Guidance, 2013, 33 (6), 46 (in Chinese). 周喻虹, 张永利, 景涛, 等. 弹箭与制导学报, 2013, 33 (6), 46. 4 Luo C Y, Zhang P, Li W D, et al. Aeronautical Science and Technology, 2017, 28 (1), 19 (in Chinese). 罗楚养, 张朋, 李伟东, 等. 航空科学技术, 2017, 28 (1), 19. 5 Shaterani P, Zarei-Hanzaki A, Fatemi-Varzaneh S M, et al. Materials and Design, 2014, 58, 535. 6 Li R Q, Liu Z L, Dong F, et al. Metallurgical and Materials Transactions A, 2016, 47 (8), 3791. 7 Wang H M, Yi Y P, Huang S Q. Journal of Alloys and Compounds, 2016, 685,941. 8 Mei L. Study of cryogenic thermo-mechanical treatment behavior of 6016 aluminium alloy. Master's Thesis, Chongqing University, China, 2015 (in Chinese). 梅霖. 6016铝合金低温形变热处理行为的研究. 硕士学位论文, 重庆大学, 2015. 9 Cui X W, Xu X F, Ning Y H, et al. Materials Research B: Research Papers, 2017, 31 (7), 90 (in Chinese). 崔歆炜, 徐晓峰, 宁玉恒, 等. 材料导报:研究篇, 2017, 31 (7), 90. 10 Guo S M. Effect of cold deformation and aging on microstructures and mechanical properties of 2219 aluminum alloy. Master's Thesis, Dalian University of Technology, China, 2017 (in Chinese). 郭素墨. 冷变形及时效对 2219铝合金组织和力学性能的影响研究. 硕士学位论文, 大连理工大学, 2017. 11 Hussain M, Rao P N, Jayaganthan R, et al. Metallography Microstructure and Analysis, 2015, 3, 225. 12 Hei H L, Yi Y P, Huang S Q, et al. Materials Characterization, 2018, 135, 22. 13 Liu X Y, Wang Z P, Li Q S, et al. Journal of Central South University, 2017, 5, 1028. 14 Lu Y L, Wang J, Li X C, et al. Journal of Alloys and Compounds, 2017, 699, 1142. 15 Joshi A, Kumar N, Yogesha K K, et al. Journal of Materials Engineering and Performance, 2016, 7, 3035. 16 Hei H L, Yi Y P, Huang S Q, et al. Materials Science and Engineering A, 2018, 712, 417. 17 Hei H L, Yi Y P, Huang S Q, et al. Journal of Materials Science and Technology, 2019, 35, 58. 18 Wen B Q, Wang B, Lu X C. Handbook of metal materials, Electronic Industry Press, China, 2013 (in Chinese). 温秉权, 王宾, 路学成. 金属材料手册,电子工业出版社, 2013. 19 Meng F X. The aging behavior and mechanical properties of deformed 2A14 aluminium alloys. Master's Thesis, Harbin Institute of Technology, China, 2013 (in Chinese). 孟富新. 形变 2A14 铝合金的时效析出行为和力学性能. 硕士学位论文, 哈尔滨工业大学, 2013. 20 Ji Y, Li D J, Zeng X Q, et al. Journal of Materials Sciences and Engineering, 2018, 36 (1), 20 (in Chinese). 季芸, 李德江, 曾小勤, 等. 材料科学与工程学报, 2018, 36 (1), 20. 21 Zhu A W, Starke E A. Acta Materialia, 1999, 47 (11), 3269. |
|
|
|