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Semi-solid extrusion of TiC_p/2024Al composites prepared by contact reaction method 被引量:3

Semi-solid extrusion of TiC_p/2024Al composites prepared by contact reaction method
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摘要 The contact reaction method was employed to prepare TiC p/2024Al composites and the semi solid extrusion was employed to manufacture composite rods. Through many experiments, suitable processing parameters were obtained, under which sound rods can be fabricated. It is found from the extrusion pressure—stroke curves of semi solid extrusion that the deformation force during semi solid extrusion is low and steady. The reason for lower extrusion pressure of semi solid extrusion was given. Some fabrication defects, such as break out and excessive extrusion force, owing to the inappropriate selection of processing parameters were also observed. The microstructures of TiCp/2024Al composites are characterized by well densified matrix, uniformly distributed TiC particles, some banded particle clusters and realignment of TiC particles along the extrusion direction, and no fracture of TiC particles. The mechanical properties of TiC p/2024Al composites are much higher than those of unreinforced alloy. In the meantime, the elongations of the composites are maintained at the level enough for practical applications. The contact reaction method was employed to prepare TiCp/2024Al composites and the semi-solid extrusion was employed to manufacture composite rods. Through many experiments, suitable processing parameters were obtained, under which sound rods can be fabricated. It is found from the extrusion pressure-stroke curves of semi-solid extrusion that the deformation force during semi-solid extrusion is low and steady. The reason for lower extrusion pressure of semisolid extrusion was given. Some fabrication defects, such as break-out and excessive extrusion force, owing to the inappropriate selection of processing parameters were also observed. The microstructures of TiCp/2024Al composites are character;ed by well-densified matrix, uniformly distributed TiC particles, some banded particle clusters and realignment of TiC particles along the extrusion direction, and no fracture of TiC particles. The mechanical properties of TiCp/2024Al composites are much higher than those of unreinforced alloy. In the meantime, the elongations of the composites are maintained at the level enough for practical applications.
机构地区 Harbin Inst Technol
出处 《中国有色金属学会会刊:英文版》 CSCD 2000年第3期304-308,共5页 Transactions of Nonferrous Metals Society of China
关键词 TIC p/2024Al SEMI SOLID EXTRUSION microstructure mechanical properties TiCp/2024Al semi-solid extrusion microstructure mechanical properties
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