| 波浪型倾斜板振动过程中晶粒直接球状长大行为 |
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| 引用本文： | 谢丰广,管仁国,李江平,刘相华.波浪型倾斜板振动过程中晶粒直接球状长大行为[J].东北大学学报(自然科学版),2009,30(3):377-380. |
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| 作者姓名： | 谢丰广 管仁国 李江平 刘相华 |
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| 作者单位： | 1. 东北大学轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004
2. 东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | 利用金相显微镜、能谱仪研究Al-6Si-2Mg合金的凝固与长大行为.研究发现在波浪型倾斜板振动条件下,合金流经斜板表面时在合金凝固过程中伴随着非枝晶组织演化行为,并存在晶粒直接球状长大行为.倾斜板为形核提供足够大的过冷度和异质形核基础,大量晶核在斜板表面和内部形成,使熔体爆发形核,在流动和振动作用下斜板表面形成的晶核游离,弥散到熔体内部,晶核在均匀的成分场与温度场条件下,可以保持直接球状生长.爆发形核与直接球状长大是波浪型倾斜振动条件下合金组织细化与球化的重要机制之一.
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| 关 键 词： | 波浪型倾斜板 振动 半固态 凝固 晶粒长大 |
Direct Growth Behavior of Spherical Grains in Vibration Process of Sloping Corrugated Plate |
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| XIE Feng-guang,GUAN Ren-guo,LI Jiang-ping,LIU Xiang-hua.Direct Growth Behavior of Spherical Grains in Vibration Process of Sloping Corrugated Plate[J].Journal of Northeastern University(Natural Science),2009,30(3):377-380. |
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| Authors: | XIE Feng-guang GUAN Ren-guo LI Jiang-ping LIU Xiang-hua |
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| Institution: | XIE Feng-guang1,GUAN Ren-guo2,LI Jiang-ping2,LIU Xiang-hua1(1.The State Key Laboratory of Rolling & Automation,Northeastern University,Shenyang 110004,China,2.School of Materials & Metallurgy,China.) |
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| Abstract: | Metalloscope and energy spectrometer were used to investigate the behavior of solidification and growth of Al-6Si-2Mg alloy.The results showed that in the vibration process of sloping corrugated plate,the alloy solidification process is accompanied with non-dendritic structure evolution and direct growth behavior of spherical grains when the molten alloy is flowing along the plate surface.The sloping plate can provide sufficiently the under-cooling for nucleation and lay a foundation for heterogeneous nucle... |
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| Keywords: | sloping corrugated plate vibration semisolid solidification grain growth |
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