高性能镁合金凝固组织控制研究现状与展望

doi:10.11900/0412.1961.2017.00503

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

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[J]. Acta Metall Sin, 2018, 54(5): 637-646.

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 words： magnesium 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

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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]

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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