| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Static and Dynamic Precipitation Behavior of the Al–20wt.%Zn Alloy |
| Chong-Yu Liu1,2**, Hong-Jie Jiang1, Chun-Xia Wang1, Hai-Quan Qi1, Yi-Bing Li1,3, Ming-Zhen Ma2, Ri-Ping Liu2 |
1Key Laboratory of New Processing Technology for Nonferrous Metal & Materials (Ministry of Education), Guilin University of Technology, Guilin 541004
2State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004
3Guangxi Key Laboratory of Universities for Clean Metallurgy and Comprehensive Utilization of Nonferrous Metal Resources, Guilin 541004
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| Cite this article: |
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Chong-Yu Liu, Hong-Jie Jiang, Chun-Xia Wang et al 2016 Chin. Phys. Lett. 33 056101 |
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Abstract The static and dynamic precipitation behavior of solution-treated binary Al–20 wt.% Zn alloy is investigated via artificial aging, cold rolling and artificial aging combined with cold rolling. The solution-treated Al–Zn alloy exhibits high thermal stability during aging, and low densities of nano-sized Zn particles are precipitated along with Al grain boundaries after aging at 200$^{\circ}\!$C for 13 h. Compared with static precipitation, dynamic precipitation occurs more easily in the Al–Zn alloy. Zn clusters are obtained after cold rolling at an equivalent plastic strain of 0.6, and the size of the Zn phase reaches hundreds of nanometers when the strain is increased to 12.1. The results show that the speed of static precipitation can be significantly enhanced after the application of 2.9 rolling strain. Grain refinement and defects induced by cold rolling are considered to promote Zn precipitation. The hardness of Al–Zn alloy is also affected by static and dynamic precipitations.
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Received: 26 February 2016
Published: 31 May 2016
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| PACS: |
61.46.-w
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(Structure of nanoscale materials)
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61.46.Bc
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(Structure of clusters (e.g., metcars; not fragments of crystals; free or loosely aggregated or loosely attached to a substrate))
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61.72.Cc
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(Kinetics of defect formation and annealing)
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66.30.Lw
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(Diffusion of other defects)
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