| 高能超声对Al-5Ti-1B中间合金组织和细化行为的影响 |
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| 引用本文： | 韩延峰,李克,王俊,孙宝德.高能超声对Al-5Ti-1B中间合金组织和细化行为的影响[J].航空材料学报,2005,25(5):8-14. |
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| 作者姓名： | 韩延峰 李克 王俊 孙宝德 |
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| 作者单位： | 上海交通大学,金属基复合材料国家重点实验室,上海,200030 |
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| 基金项目： | 国家高技术研究发展计划(863)(2002AA336072)，上海市优秀学科带头人计划(03XD14009)，上海市科委纳米技术专项(No.0352mm054) |
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| 摘 要： | 在A l-5Ti-1B中间合金的制备和重熔过程中引入高能超声处理,研究了其对中间合金组织和细化效果的影响。结果发现:在市售A l-5Ti-1B重熔过程中施加超声处理,可以显著改善合金组织和细化作用;制备过程中施加超声处理可以加速氟盐和铝熔体间反应的进行,均匀化组织,提高细化效果;中间合金制备及凝固过程联合超声处理,不仅可以改变TiA l3相的形貌,而且改变了TiB2聚集团的形态,使其变为疏松的鱼卵状,粒子之间不再存在粘连现象,中间合金的细化效果进一步提高。
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| 关 键 词： | Al-5Ti-1B中间合金 高能超声 细化 |
| 文章编号： | 1005-5053(2005)05-0008-07 |
| 修稿时间： | 2004年9月5日 |
Effect of High-intensity Ultrasonic on the Microstructure and Grain Refinement of Al-5Ti-1B Master Alloy |
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| HAN Yan-feng,LI Ke,WANG Jun,SUN Bao-de.Effect of High-intensity Ultrasonic on the Microstructure and Grain Refinement of Al-5Ti-1B Master Alloy[J].Journal of Aeronautical Materials,2005,25(5):8-14. |
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| Authors: | HAN Yan-feng LI Ke WANG Jun SUN Bao-de |
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| Abstract: | The influence of high-intensity ultrasonic,which is applied in fabrication and remelting of Al-5Ti-1B master alloy,on microstructure and grain refinement of the master alloy is investigated.When the commercial Al-5Ti-1B master alloy is treated with high-intensity ultrasonic in the remelting process,its microstructure and grain refinement property are improved.The ultrasonic vibration in fabrication can accelerate the reaction of halide salts and aluminium melt,uniform the microstructure and increase the grain refining performance.The united ultrasonic treatments in fabrication and subsequent solidification of the master alloy can change not only the morphology of TiAl_3 phase,but also the morphology of TiB_2 particles agglomeration.As a result,the particles in the agglomeration do not conglutinate and are spawn-like form instead,and the performance of the master alloy is further improved. |
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| Keywords: | Al-5Ti-1B master alloy high-intensity ultrasonic grain refinement |
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