Materials Reports  2019, Vol. 33 Issue (Z2): 402-405 |
| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Cu Content on Precipitation Behavior of Al-Zn-Mg-Cu Aluminum Alloy |
| CHAO Daiyi1, SUN Youzheng1, LIU Xiaoteng1, LI Xingdong1, LI Weijian2, LYU Zhengfeng1, CHENG Rence1
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1 National Engineering Research center for Plastic Working of Aluminium Alloys, Shandong Nanshan Aluminum Co., Ltd., Longkou 265713;
2 College of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005 |
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Abstract The effects of Cu content on precipitation behavior of GP area and η′ phase of Al-Zn-Mg-Cu aluminum alloy was investigated by using the aluminum alloy module in thermodynamic simulation software in detail. The results show that the content of some Cu element was in GP area and η′ phase. Under aging temperature of 120 ℃ and 160 ℃, with the increase of Cu content from 1.9% to 2.5%, the content of GP area decreased from 2.65% and 1.11% to 2.60% and 1.02% respectively. While the content of η′ phase decreased from 6.71% and 6.52% to 7.25% and 7.07% respectively. The used time of η′ phase content reaching 6.5wt% decreased with the increase of Cu content. The time from 23 h and 5 h droped down to 16 h and 2.8 h with the increase of Cu content at the aging temperature 120 ℃ and 160 ℃, respectively. The nose temperature kept at 150 ℃ of GP area and 330 ℃ of η′ phase with the increasing of Cu content, as well as the critical cooling ratio kept at 16 ℃/s. In other words, the content of Cu have a little effect on quenching sensitivity.
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Published: 25 November 2019
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About author:: Daiyi Chao received his master of engineering in environmental and material engineering from Yantai University in June 2013. From September 2013 to March 2017, he studied for doctorate in school of materials, Harbin Institute of Technology. Mainly engaged in heat treatment and deformation process of stainless steel and high strength aluminum alloy. At present, he is a failure analysis expert of Chines Failure Analysis Institution of CMES.
Weijian Li, Ph.D. lecturer, since August 2019,worked at College of Nuclear Equipment and Nuclear Engineering of Yantai University, mainly engaged in the research of first-Principles calculations of interface pro-perties and process properties of metal materials. |
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