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金属学报  2018, Vol. 54 Issue (5): 637-646    DOI: 10.11900/0412.1961.2017.00503
  金属材料的凝固专刊 本期目录 | 过刊浏览 |
高性能镁合金凝固组织控制研究现状与展望
吴国华(), 陈玉狮, 丁文江
上海交通大学金属基复合材料国家重点实验室轻合金精密成型国家工程研究中心 上海 200240
Current Research and Future Prospect on Microstructures Controlling of High Performance Magnesium Alloys During Solidification
Guohua WU(), Yushi CHEN, Wenjiang DING
National Engineering Research Center of Light Alloys Net Forming, State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
全文: PDF(8022 KB)   HTML
摘要: 

高性能镁合金的开发应用与凝固组织控制是当前的研究热点。采用定向凝固技术、快速凝固技术以及在镁合金凝固过程中施加外场能够有效地控制镁合金的凝固组织,从而改善材料的综合力学性能。本文主要综述了定向凝固技术、快速凝固技术以及电磁搅拌3种方式对高性能镁合金的凝固组织进行控制的研究现状。最后,展望了凝固组织控制的发展趋势。

关键词 镁合金凝固组织定向凝固快速凝固电磁搅拌    
Abstract

The researches on development, application and solidification microstructures of high performance magnesium (Mg) alloys have received considerable interest recently. The solidification microstructures of Mg alloys can be effectively controlled by using directional solidification technology, rapid solidification technology and the application of external field during solidification, and thus the enhanced comprehensive mechanical properties of the materials are obtained. The current researches on solidification microstructure controlling of high performance Mg alloys by using directional solidification technology, rapid solidification technology and electromagnetic stirring were reviewed. Finally, the development trend on the controlling of solidification microstructure was proposed.

Key wordsmagnesium alloy    solidification microstructure    directional solidification    rapid solidification    electromagnetic stirring
收稿日期: 2017-11-28     
ZTFLH:  TG146.2  
基金资助:资助项目 国家自然科学基金项目No.51775334
作者简介:

作者简介 吴国华,男,1964年生,教授

引用本文:

吴国华, 陈玉狮, 丁文江. 高性能镁合金凝固组织控制研究现状与展望[J]. 金属学报, 2018, 54(5): 637-646.
Guohua WU, Yushi CHEN, Wenjiang DING. Current Research and Future Prospect on Microstructures Controlling of High Performance Magnesium Alloys During Solidification. Acta Metall Sin, 2018, 54(5): 637-646.

链接本文:

https://www.ams.org.cn/CN/10.11900/0412.1961.2017.00503      或      https://www.ams.org.cn/CN/Y2018/V54/I5/637

图1  Mg-38%Zn合金定向凝固过程中不同部位初生α-Mg柱状晶及二次枝晶臂的同步辐射图片[7]
图2  Mg-6%Gd合金在不同冷却速率下定向凝固的组织演变[19]
Alloy Tg / K Tx / K ΔTx / K Ref.
Mg58.5Cu30.5Y11 425 495 67 [26]
Mg60Cu25Y10 420 490 70 [34]
Mg65Cu25Y10 418 468 50 [35,36]
Mg61Cu28Gd11 422 483 61 [37]
Mg65Ni20Nd15 459.3 501.4 42.1 [38]
Mg85Ni5Y10 450 467 17 [39]
Mg70Zn30 352 374 22 [40]
Mg67Zn28Ca5 359 374 15 [40]
Mg65Cu15Y10Ag10 428 469 41 [41]
(Mg61Cu28Gd11)97Cd2 426 496 70 [42]
Mg65Cu20Zn5Y10 404 456 52 [43]
Mg59.5Cu22.9Ag6.6Gd11 425 472 47 [44]
Mg66Zn30Ca2.5Sr1.5 369 386 17 [45]
Mg66Zn29Ca4Ag1 369 383 14 [46]
(Mg0.585Cu0.305Y0.11)90Be10 428 478 50 [26]
Mg65Cu12.5Ag5Gd10Ni7.5 428.1 490.8 62.7 [47]
Mg65Cu7.5Ni7.5Zn5Ag5Y10 422 463 41 [48]
(Mg0.98Al0.02)60Cu30Y10 418 454 36 [49]
表1  一些典型的镁基非晶合金成分和热力学数据[26,34~49]
图3  NZ30 合金浆料搅拌不同时间后的组织[75]
图4  电磁搅拌过程中NZ30合金浆料初生α-Mg颗粒演变过程示意图[75]
图5  不同流量制备的AZX912合金半固态浆料[82]
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