Effect of rolling temperature on the microstructure and mechanical properties of 6201 Al alloy

Hongxiang Li; ShengLi Guo; Jianjun Zhang; Peng Du; Shengpu Liu

doi:10.3139/120.111340

Article

Effect of rolling temperature on the microstructure and mechanical properties of 6201 Al alloy

Hongxiang Li , ShengLi Guo , Jianjun Zhang , Peng Du and Shengpu Liu

Published/Copyright: April 30, 2019

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From the journal Materials Testing Volume 61 Issue 5

Abstract

An 6201Al alloy was rolled at room temperature (RT), liquid nitrogen and alcohol mixed temperature (LAT) and liquid nitrogen temperature (LNT). The effect of the rolling temperature on microstructure and mechanical properties was investigated by means of hardness measurements, tensile tests, optical microscopy (OM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Microstructural observations reveal that the dislocation tangles and dislocation density increased with decreasing rolling temperature. The dislocation accumulation was enhanced, and the formation of dislocation tangles and cells occurred during deformation under low rolling temperature. The substructures of the rolled sample at LAT and LNT are similar, consisting of dislocation cells, high dislocation density with networks, dislocation array, dislocation tangles and subgrains. Compared with rolled samples at RT and LAT, the rolled samples at LNT presented strengthened hardness and strength. The improvement of mechanical properties contributes to the fine substructures and accumulation of higher dislocation density during low temperature rolling. In addition, with decreasing rolling temperature, the average dimple size decreased.

∗Correspondence Address, ShengLi Guo, General Research Institute for Nonferrous Metals, No 2, Xinjiekou Street, Beijing, P. R. China, Research Institute of Engineering Technology, No. 11 Xingke East Street, Yanqi Economic Development Zone, Beijing, P. R. China, E-mail: guoshengli007@163.com

Hongxiang Li is studying for a Master's Degree at the General Research Institute for Nonferrous Metals, Beijing, China.

Dr. ShengLi Guo is Professor at the General Research Institute for Nonferrous Metals, Beijing, China, with expertise in metal material processing engineering. He received his PhD degree at the General Research Institute for Nonferrous Metals, Beijing, China, in 2009. He joined the General Research Institute for Nonferrous Metals in 2009.

Dr. Jianjun Zhang is an Associate Professor of Materials Science and Engineering at the School of Materials Science and Engineering, Xihua University, Chengdu, China, with expertise in wear resistant materials. He received his PhD degree at Xi'an Jiaotong University, Xi'an, China, in 2009. He joined Xihua University in 2012.

Peng Du is an Associate Professor at the General Research Institute for Nonferrous Metals, Beijing, China, with expertise in metal material processing engineering. He received his Master's Degree at the General Research Institute for Nonferrous Metals, Beijing, China, in 2010. He joined the General Research Institute for Nonferrous Metals in 2010.

Shengpu Liu is studying for a Doctoral Degree at the General Research Institute for Nonferrous Metals, Beijing, China.

References

1 X.Sauvage, E. V.Bobruk, M. Yu.Murashkin, Y.Nasedkina, N. A.Enikeev, R. Z.Valiev: Optimization of electrical conductivity and strength combination by structure design at the nanoscale in Al-Mg-Si alloys, Acta Materialia98 (2015), pp. 355–36610.1016/j.actamat.2015.07.039Search in Google Scholar

2 B. B.Zhang, N. R.Tao, K.Lu: A high strength and high electrical conductivity bulk Cu-Ag alloy strengthened with nanotwins, Scripta Materialia129 (2017), pp. 39–4310.1016/j.scriptamat.2016.10.022Search in Google Scholar

3 Young GunKo, SeungNamgung, Byung UkLee, Dong HyukShin: Mechanical and electrical responses of nanostructured Cu-3 wt.-%Ag alloy fabricated by ECAP and cold rolling, Journal of Alloys and Compounds504S (2010), pp. 448–45110.1016/j.jallcom.2010.02.198Search in Google Scholar

4 Kun XiaWei, WeiWei, FeiWang, Qing BoDu, I. V.Alexandrov, JingHu: Microstructure, mechanical properties and electrical conductivity of industrial Cu-0.5 %Cr alloy processed by severe plastic deformation, Materials Science and Engineering A528 (2011), pp. 1478–148410.1016/j.msea.2010.10.059Search in Google Scholar

5 S. H.Lee, Y.Saito, T.Sakai, H.Utsunomiya: Microstructures and mechanical properties of 6061 aluminum alloy processed by accumulative roll-bonding, Materials Science and Engineering A325 (2002), pp. 228–23510.1016/S0921-5093(01)01416-2Search in Google Scholar

6 X. P.Chen, L.Mei, D.Chen, Z. L.Bao, Q.Liu: The effect of initial aging treatment on the microstructure and mechanical properties of cryorolled 6016 Al alloy, Materials Science and Engineering A667 (2016), pp. 311–31610.1016/j.msea.2016.04.099Search in Google Scholar

7 V. L.Niranjani, K. C. HariKumar, V. SubramanyaSarma: Development of high strength Al-Mg-Si AA6061 alloy through cold rolling and ageing, Materials Science and Engineering A515 (2009), pp. 169–174,4 10.1016/j.msea.2009.03.077Search in Google Scholar

8 S. K.Panigrahi, R.Jayaganthan: A study on the mechanical properties of cryorolled Al-Mg-Si alloy, Materials Science and Engineering A480 (2008), pp. 299–30510.1016/j.msea.2007.07.024Search in Google Scholar

9 M.Abbasi-Baharanchi, F.Karimazadeh, M. H.Enayati: Thermal stability evaluation of nanostructured Al6061 alloy produced by cryorolling, Transactions of Nonferrous Metals Society of China27(2017), pp. 754–76210.1016/S1003-6326(17)60086-4Search in Google Scholar

10 C. S.Tsao, C. Y.Chen, U. S.Jeng, T. Y.Kuo: Precipitation kinetics and transformation of metastable phases in Al-Mg-Si alloys, Acta Materialia54 (2006), pp. 4621–463110.1016/j.actamat.2006.06.005Search in Google Scholar

11 R. Z.Valiev, M. Yu.Murashkina, I.Sabirovc: A nanostructural design to produce high-strength Al alloys with enhanced electrical conductivity, Scripta Materialia76 (2014), pp. 13–1610.1016/j.scriptamat.2013.12.002Search in Google Scholar

12 S. K.Panigrahi, R.Jayaganthan, V.Chawla: Effect of cryorolling on microstructure of Al-Mg-Si alloy, Materials Letters62 (2008), pp. 2626–262910.1016/j.matlet.2008.01.003Search in Google Scholar

13 S. K.Panigrahi, R.Jayaganthan: A study on the mechanical properties of cryorolled Al-Mg-Si alloy, Materials Science and Engineering A480 (2008), pp. 299–30510.1016/j.msea.2007.07.024Search in Google Scholar

14 Y. M.Wang, M. W.Chen, F. H.Zhou, E.Ma: High tensile ductility in a nanostructured metal, Nature419 (2002), pp. 912–91510.1038/nature01133Search in Google Scholar PubMed

15 N. NagaKrishna, M.Ashfaq, P.Susila, K.Sivaprasad, K.Venkateswarlu: Mechanical anisotropy and microstructural changes during cryorolling of Al-Mg-Si alloy, Materials Characterization107 (2015), pp. 302–30810.1016/j.matchar.2015.07.033Search in Google Scholar

16 D. R.Fang, Q. Q.Duan, N. Q.Zhao, J. J.Li, S. D.Wu, Z. F.Zhang: Tensile properties and fracture mechanism of Al–Mg alloy subjected to equal channel angular pressing, Materials Science and Engineering A459 (2007), pp. 137–14410.1016/j.msea.2007.01.062Search in Google Scholar

Published Online: 2019-04-30

Published in Print: 2019-05-02

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