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固溶处理过程中不同加热和冷却速率对AA7050合金丝微观组织和性能的影响

Effects of Different Heating and Cooling Rates during Solution Treatment on Microstructure and Properties of AA7050 Alloy Wires.

作者信息

Gao Xinyu, Gao Guanjun, Li Zhihui, Li Xiwu, Yan Lizhen, Zhang Yongan, Xiong Baiqing

机构信息

State Key Laboratory of Non-Ferrous Metals and Processes, China GRINM Group Co., Ltd., Beijing 100088, China.

Northeast Light Alloy Co., Ltd., Harbin 150060, China.

出版信息

Materials (Basel). 2024 Jan 8;17(2):310. doi: 10.3390/ma17020310.

DOI:10.3390/ma17020310
PMID:38255477
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10817534/
Abstract

In the present study, the effects of varying heating and cooling rates during the solution treatment process on the microstructure and properties of AA7050 alloy wires were investigated using tensile tests, metallographic microscopy, electron backscattered diffraction, and transmission electron microscopy. It was found that the recrystallized grain size of the alloy, subjected to method of rapid heating, exhibited a smaller and more uniform distribution in comparison to method of slow heating. The low density of η' strengthening phases after the artificial aging treatment was formed using air cooling method. Meanwhile, by using the water quenching method sufficient solute atoms and more nucleation sites were provided resulting in a large number of η' strengthening phases being formed. In addition, the alloy processed using the water quenching method displayed higher strength than that treated using the air cooling method for the T6 and T73 states. Furthermore, coarse precipitates formed and less clusters were observed in the matrix, while high density nanoscale clusters and no continuous precipitation are formed when using the water quenching method.

摘要

在本研究中，通过拉伸试验、金相显微镜、电子背散射衍射和透射电子显微镜，研究了固溶处理过程中不同加热和冷却速率对AA7050合金丝微观结构和性能的影响。结果发现，与缓慢加热方法相比，采用快速加热方法的合金再结晶晶粒尺寸更小且分布更均匀。采用空冷方法进行人工时效处理后，η'强化相的密度较低。同时，通过水淬方法提供了足够的溶质原子和更多的形核位置，从而形成了大量的η'强化相。此外，对于T6和T73状态，采用水淬方法加工的合金比采用空冷方法处理的合金具有更高的强度。此外，采用空冷方法时，基体中形成粗大析出相且观察到较少的团簇，而采用水淬方法时，形成高密度的纳米级团簇且无连续析出。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/e234be8a4420/materials-17-00310-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/64e95b72fe50/materials-17-00310-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/5101424610d8/materials-17-00310-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/d822c3dabcf1/materials-17-00310-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/92dbe59e8d30/materials-17-00310-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/e234be8a4420/materials-17-00310-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/64e95b72fe50/materials-17-00310-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/211c1e0e2dcb/materials-17-00310-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/2b6dd1d5430d/materials-17-00310-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/5101424610d8/materials-17-00310-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/537d82853c4a/materials-17-00310-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/d822c3dabcf1/materials-17-00310-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/92dbe59e8d30/materials-17-00310-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4584/10817534/e234be8a4420/materials-17-00310-g009.jpg

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本文引用的文献

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Acta Mater. 2021 Oct 15;219. doi: 10.1016/j.actamat.2021.117268. Epub 2021 Aug 26.
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Corrosion Resistance of Aluminum Alloy AA2024 with Hard Anodizing in Sulfuric Acid-Free Solution.无硫酸溶液中硬质阳极氧化的AA2024铝合金的耐腐蚀性
Materials (Basel). 2022 Sep 15;15(18):6401. doi: 10.3390/ma15186401.
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Effects of the Quenching Rate on the Microstructure, Mechanical Properties and Paint Bake-Hardening Response of Al-Mg-Si Automotive Sheets.
淬火速率对铝镁硅系汽车板材微观结构、力学性能及烤漆硬化响应的影响
Materials (Basel). 2019 Oct 31;12(21):3587. doi: 10.3390/ma12213587.
4
Atomic pillar-based nanoprecipitates strengthen AlMgSi alloys.基于原子柱的纳米沉淀物强化了AlMgSi合金。
Science. 2006 Apr 21;312(5772):416-9. doi: 10.1126/science.1124199.