Cone-shaped part prepared by pure Al powder sintered material processed by HPT was studied by compressible rigid plastic FEM, the distribution and the variational trend of strain and density in HPT process were analyzed; The specimen was deformed by HPT equipment and die, microstructure, microhardness and density of different points in undeformed and deformed specimens had been examined. The results show that HPT process is a useful tool for reducing the porosity in specimen, the relative density of specimen is above 0.996 in FEM, while it reaches to 0.98 in the experiment; the strain-effective of different points in specimen are different, it reaches to the highest in the edge of specimen, about 4.5, microhardness reaches to 61.12HV0.1/10 in the edge of specimen, it is also the highest.
Zhilyaev A P, Nurislamova G V, Kim B K, et al. Experimental Parameters Influencing Grain Refinement and Microstructural Evolution during High- pressure Torsion[J]. Acta Materialia, 2003,51 (3) : 753-765.
[4]
Krasilnikov N A, Sharafutdiniv A. High Strength and Ductility of Nanostructured Al- based Alloy Prepared by High-pressure Technique [J]. Materials Science and Engineering A, 2007,463 (1/2): 74-77.
[5]
Zhilyaev A P, McNelley T R, Langdon T G. Evolution of Mierostrueture and Microtexture in fee Metals during High-pressure Torsion[J]. Journal of Material Science,2007,42(5) :1517-1528.
[6]
Zhilyaev A P, Lee S, Nurislamova G V, et al. Microhardness and Microstruetural Evolution in Pure Nickel during High- pressure Torsion[J]. Scripta materialia, 2001,44(12) :2753-2758.
[7]
Wetscher F, Vorhauer A,Stock R, et al. Structural Refinement of Low Alloyed Steels during Severe Plastic Deformation[J]. Materials Science and Engineering A, 2004,387/389 : 809-816.
[8]
Vorhauer A,Kleber S,Pippan R. Influence of Processing Temperature on Microstruetural and Mechanical Properties of High-alloyed Single-phase Steels Subjected to Severe Plastic Deformation[J]. Materials Science and Engineering A, 2005, 410/ 411 : 281-284.