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铝板搅拌摩擦加工后原位自生第二相颗粒及焊核

腊月:快赢彩票网    发布时间:2017-12-13 点击量:
铝板搅拌摩擦加工后原位自生第二相颗粒及焊核区晶粒尺寸In-Situ Produced Second Phase Particles and Grain Size in Weld Nugget Zone of Aluminum Plate after Friction Stir Processing对1060铝板进行了搅拌摩擦加工(FSP), 通过在加工区添加钛粉的方法原位生成了第二相Al3Ti颗粒, 研究了第二相颗粒的分布及焊核区晶粒尺寸。结果表明: 在焊核区前进侧钛粉的弥散程度随FSP道次的增多而增大, 4道次后基本呈弥散分布, 并与铝反应生成纳米级Al3Ti颗粒, 该颗粒从界面处剥落后仍聚集于钛粉周围; 第二相颗粒有效地限制了晶粒的长大, 其数量较多的区域晶粒较细小, 且在加工后热处理中几乎不发生长大。 The friction stir processing (FSP) was performed on 1060-Al plates, and the Ti powders were added into the processing zone to in-situ produce the second phase particles of Al3Ti. The distributions of the second phase particles and the grains in the weld nugget zone were studied. The results show that at the advancing side of the weld nugget zone, the dispersity of Ti powders increased with the FSP passes increase and after 4-pass FSP reached a homogeneous state. Ti powders were reacted with Al and the nano-scale Al3Ti particles were obtained. The particles were peeled off from the interface but still aggregated around Ti powders. The second phase particles can inhibit the grain growth effectively. The more amounts of the second phase particles in the area, the finer grains were obtained and the grains almost did not grow during the heat treatment after processing. 全文下载:

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