Effect of Temperature on Grain Size in AA6063 Aluminum Alloy Subjected to Repetitive Corrugation and Straightening

doi:10.1007/s40195-018-0866-6

Abstract

Abstract:

The influence of processing temperature on grain size reduction in AA 6063 aluminum alloy subjected to repetitive corrugation and straightening (RCS) is investigated in this work. The aluminum alloy was processed by RCS at different temperatures (room temperature, 100 °C, 200 °C and 300 °C) till the maximum number of passes possible before failure and the mechanical properties such as tensile strength and hardness were measured. The grain size and their misorientation of grains of the processed samples were analyzed using the electron backscattered diffraction. The results indicated that the transformation of low-angle grain boundaries to high-angle grain boundaries and dislocation tangles were highly dependent on the strain imparted, which could be controlled by selecting the proper processing temperature. As a result, the mechanical properties are affected. In particular, the room temperature tensile strength and hardness values of the processed material decrease with increasing processing temperature.

Key words: Repetitive corrugation and straightening, Strain, Grain size reduction/refinement, EBSD, Strength, Hardness

N. Thangapandian, S. Balasivanandha Prabu , K. A. Padmanabhan. Effect of Temperature on Grain Size in AA6063 Aluminum Alloy Subjected to Repetitive Corrugation and Straightening[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(7): 835-844.

Figures/Tables 10

Fig. 1 Schematic of a corrugation die, b straightening die

Fig. 2 Room temperature hardness for AA6063 alloy processed at RT and three elevated temperatures

Fig. 3 Stress-strain curves for alloy AA6063: a processed at RT, b processed at 100 °C, c processed at 200 °C, d processed at 300 °C

Fig. 4 Arrhenius plot to determine activation energy for rate controlling process

Fig. 5 a EBSD GB map, b grain size distribution, c misorientation angle map of AA6063 alloy

Fig. 6 EBSD images of AA6063 after a 4 passes at RT, b 6 passes at RT, c 8 passes at RT, d 4 passes at 100 °C, e 6 passes at 100 °C, f 8 passes at 100 °C, g 4 passes at 200 °C, h 6 passes at 200 °C, i 8 passes at 200 °C, j 4 passes at 300 °C, k 6 passes at 300 °C, l 8 passes at 300 °C

Fig. 7 Grain size distribution in AA6063 after a 4 passes at RT, b 6 passes at RT, c 8 passes at RT, d 4 passes at 100 °C, e 6 passes at 100 °C, f 8 passes at 100 °C, g 4 passes at 200 °C, h 6 passes at 200 °C, i 8 passes at 200 °C, j 4 passes at 300 °C, k 6 passes at 300 °C, l 8 passes at 300 °C

Fig. 8 Misorientation angle fraction in AA6063 after different treatments: a 4 passes at RT, b 6 passes at RT, c 8 passes at RT, d 4 passes at 100 °C, e 6 passes at 100 °C, f 8 passes at 100 °C, g 4 passes at 200 °C, h 6 passes at 200 °C, i 8 passes at 200 °C, j 4 passes at 300 °C, k 6 passes at 300 °C, l 8 passes at 300 °C

Fig. 9 Inverse pole figures of alloy after RCS at different temperatures: a 4 passes at RT, b 6 passes at RT, c 8 passes at RT, d 4 passes at 100 °C, e 6 passes at 100 °C, f 8 passes at 100 °C

Fig. 10 XRD patterns of alloy after RCS at different temperatures

[1]	Xiaosheng Zhou, Hao Chen, Chenxi Liu, Yongchang Liu. Residual Ferrite Control of 9Cr ODS Steels by Tailoring Reverse Austenite Transformation [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(2): 187-195.
[2]	Jinglin Liu, Qi Song, Lihui Song, Shude Ji, Mingshen Li, Zhen Jia, Kang Yang. A Novel Friction Stir Spot Riveting of Al/Cu Dissimilar Materials [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(1): 135-144.
[3]	Lin-Yue Jia, Wen-Bo Du, Jin-Long Fu, Zhao-Hui Wang, Ke Liu, Shu-Bo Li, Xian Du. Obtaining Ultra-High Strength and Ductility in a Mg-Gd-Er-Zn-Zr Alloy via Extrusion, Pre-deformation and Two-Stage Aging [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(1): 39-44.
[4]	Tianbo Zhao, Yutaka S. Sato, Hiroyuki Kokawa, Kazuhiro Ito. Predicting Tensile Properties of Friction-Stir-Welded 6063 Aluminum with Experimentally Measured Welding Heat Input [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(9): 1235-1242.
[5]	Yuan Yu, Peiying Shi, Kai Feng, Jiongjie Liu, Jun Cheng, Zhuhui Qiao, Jun Yang, Jinshan Li, Weimin Liu. Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1077-1090.
[6]	Qiuxin Nie, Hui Liang, Dongxu Qiao, Zhaoxin Qi, Zhiqiang Cao. Microstructures and Mechanical Properties of Multi-component Al_xCrFe₂Ni₂Mo_0.2 High-Entropy Alloys [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1135-1144.
[7]	Hao Wu, Si-Rui Huang, Cheng-Yan Zhu, Ji-Feng Zhang, He-Guo Zhu, Zong-Han Xie. In Situ TiC/FeCrNiCu High-Entropy Alloy Matrix Composites: Reaction Mechanism, Microstructure and Mechanical Properties [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1091-1102.
[8]	Yu-Ning Zan, Yang-Tao Zhou, Xiao-Nan Li, Guo-Nan Ma, Zhen-Yu Liu, Quan-Zhao Wang, Dong Wang, Bo-Lv Xiao, Zong-Yi Ma. Enhancing High-Temperature Strength and Thermal Stability of Al₂O₃/Al Composites by High-Temperature Pre-treatment of Ultrafine Al Powders [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 913-921.
[9]	Ning Li, Cun-Lei Jia, Zhi-Wei Wang, Li-Hui Wu, Ding-Rui Ni, Zheng-Kun Li, Hua-Meng Fu, Peng Xue, Bo-Lv Xiao, Zong-Yi Ma, Yi Shao, Yun-Long Chang. Achieving a High-Strength CoCrFeNiCu High-Entropy Alloy with an Ultrafine-Grained Structure via Friction Stir Processing [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 947-956.
[10]	Xiaochao Liu, Yufeng Sun, Tomoya Nagira, Kohsaku Ushioda, Hidetoshi Fujii. Effect of Stacking Fault Energy on the Grain Structure Evolution of FCC Metals During Friction Stir Welding [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 1001-1012.
[11]	Yunhai Su, Xuewei Liang, Yunqi Liu, Zhiyong Dai. Effect of Ti Addition on the Microstructure and Property of FeAlCuCrNiMo_0.6 High-Entropy Alloy [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 957-967.
[12]	Yue Su, Shun-Cun Luo, Liang Meng, Piao Gao, Ze-Min Wang. Selective Laser Melting of In Situ TiB/Ti6Al4V Composites: Formability, Microstructure Evolution and Mechanical Performance [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(6): 774-788.
[13]	Feng Shi, Ruo-Han Gao, Xian-Jun Guan, Chun-Ming Liu, Xiao-Wu Li. Application of Grain Boundary Engineering to Improve Intergranular Corrosion Resistance in a Fe–Cr–Mn–Mo–N High-Nitrogen and Nickel-Free Austenitic Stainless Steel [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(6): 789-798.
[14]	Juan Liu, Yuze Wu, Lin Wang, Hui Wang, Charlie Kong, Alexander Pesin, Alexander P. Zhilyaev, Hailiang Yu. Fabrication and Characterization of High-Bonding-Strength Al/Ti/Al-Laminated Composites via Cryorolling [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(6): 871-880.
[15]	Fengqiang Xiao, Dongpo Wang, Wenbin Hu, Lei Cui, Zhiming Gao, Lanju Zhou. Effect of Interlayers on Microstructure and Properties of 2205/Q235B Duplex Stainless Steel Clad Plate [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(5): 679-692.