| Effects of quenching rate and over-aging on microstructures, mechanical properties and corrosion resistance of an Al-Zn-Mg (7046A) alloy | |
| Jiang, Fuqing1,2,3; Huang, Jiwu1,4; Jiang, Yingge1; Xu, Chenglong1 | |
| Corresponding Author | Huang, Jiwu(huangjw@csu.edu.cn) |
| 2021-02-15 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 854Pages:11 |
| Abstract | To provide insight to the relationships between quenching rate and aging treatment on the microstructure and properties of Al-Zn-Mg alloys, 7046 A alloy, a low Cu-content commercial Al-Zn-Mg alloy, was selected in the present study. As-received hot-extruded 7046 A alloys were quenched in air and room temperature water and then aged at 120 degrees C for 0-120 h. The mechanical behavior, corrosion resistance and microstructures of the aged alloy were compared and analyzed. The experiment result shows that quenching rate exhibits a greater influence on the precipitates and precipitation free zones (PFZs) of aged alloys than over-aging treatment and the reasons have been discussed. The eta equilibrium phases preferentially take the Al3Zr and Al6Mn dispersoids as the heterogeneous nucleation core and grow quickly inside the grains during the slow cooling process. Over-aging treatment would broaden the grain boundary PFZ and the space of grain boundary precipitates, thus improving the corrosion resistance of water quenched alloys, while it is harmful to air quenched (AQ) alloys. Pitting resistance can be summarized as: AQ24 < AQ120 < AQ60, WQ24 < WQ60 < WQ120. The yield strength, ultimate tensile strength, and elongation the T6 treated WQ alloys (similar to 120 degrees C/24 h) are similar to 532 MPa, similar to 568 MPa, similar to 12.4%, respectively; and the corresponding values of T6 treated AQ alloys (similar to 120 degrees C/60 h) are similar to 475 MPa, similar to 521 MPa, similar to 11.4%. Long-term over-aging (120 degrees C/120 h) has little effect on the hardness, while the tensile properties decrease by similar to 5-6% compared to T6 treatment. (C) 2020 Elsevier B.V. All rights reserved. |
| Keyword | Al-Zn-Mg alloy Quenching rate Over-aging Microstructure Mechanical properties Corrosion resistance |
| Funding Organization | Scientific and Research Plan Program of Guangdong Province ; Key-Area Research and Development Program of Guangdong Province |
| DOI | 10.1016/j.jallcom.2020.157272 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Scientific and Research Plan Program of Guangdong Province[2016B090931004] ; Key-Area Research and Development Program of Guangdong Province[2020B010186002] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000596245900004 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158711 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Huang, Jiwu |
| Affiliation | 1.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 4.Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China |
| Recommended Citation GB/T 7714 | Jiang, Fuqing,Huang, Jiwu,Jiang, Yingge,et al. Effects of quenching rate and over-aging on microstructures, mechanical properties and corrosion resistance of an Al-Zn-Mg (7046A) alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,854:11. |
| APA | Jiang, Fuqing,Huang, Jiwu,Jiang, Yingge,&Xu, Chenglong.(2021).Effects of quenching rate and over-aging on microstructures, mechanical properties and corrosion resistance of an Al-Zn-Mg (7046A) alloy.JOURNAL OF ALLOYS AND COMPOUNDS,854,11. |
| MLA | Jiang, Fuqing,et al."Effects of quenching rate and over-aging on microstructures, mechanical properties and corrosion resistance of an Al-Zn-Mg (7046A) alloy".JOURNAL OF ALLOYS AND COMPOUNDS 854(2021):11. |
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